general-chat

[quartz wren]

this is something I'm quite well versed in

[dusk oracle]

8 bit or 16 bit

[quartz wren]

then for single buffer you can get away with 64K and 128K respectively

double buffer is double that obviously

[dusk oracle]

yeah so i figure that leaves quite alot to work with for small hanheld

[quartz wren]

just x times y times bits/8

[dusk oracle]

yeah

i was just hoping ppl would like 4MB left for textures respectively

[quartz wren]

I'm actually making a game console myself, using the Pico as its core driving video signal through PIO

yeah, that would be plenty for textures, especially on that low res of a system

was going to use a Teensy but uh...it doesn't have PIO and it's like 6x the price

or maybe it does and it just isn't advertised

[wary herald]

That's an AAE question

A good one at that

[quartz wren]

I had a whole elaborate external timing circuit for driving VGA planned out for interfacing to Teensy and then I learned about PIO on the pico and I'm like "yeah, that's the obvious choice, there's already code in existence for making VGA signals"

and it's flexible in possible output resolutions which is really nice

my other design would've been resolution locked unfortunately haha

[dusk oracle]

I implemented a dirty gpu using GL 1.2 on a cortex at 300MHz.
It's software driven right now but i'm moving it to a fpga right now for speed.

[quartz wren]

thing is, the PIO system can drive the signal precisely enough that I don't need to add the extra cost of an FPGA

[dusty citrus]

wow nice!

[quartz wren]

and the whole point is a console anyone can buy someone for christmas

so needs to be very cheap to produce

[dusk oracle]

thats the idea

[wary herald]

https://tenor.com/view/cheap-money-cute-bird-gif-14407449

[quartz wren]

and it will implement a 65C02 also driven by PIO and sharing memory with the pico (which will remap it dynamically) and will be able to set itself up to emulate the hardware other than the CPU of any 6502-based system and run its code more or less natively

yes, lots of work but doable.

and very precise clock scaling to keep them sweet sweet valid high scores

[dusk oracle]

esp32 for the game logic with it's 2 mighty cores.
fpga handling graphics.
and i have found a good sound chip that can handle a bucket of samples a midi and mod formats that sounds really nice thanks to supporting instrument packs and has a slew of filters.

[quartz wren]

just drive it via PCM it'll be fine

then it's all software controlled

😉

alright really though I'm gonna head out...got a lot of stuff to not do because I'm tired...

[dusk oracle]

cheers

[dusty citrus]

metroid is the cooolest game. i'm trying to make a game with random map generation that feels similar to metroid/megaman

[vagrant sonnet]

I managed to (probably) discover by accident why Gnome stopped working except the bottom little bit of the screen by causing it on KDE. I started messing with display refresh rate, and it was at 60 Hz, so I tried 120 Hz and the top little bit of the screen was cut off. Then I tried 144 Hz - the monitor’s native refresh rate - and hey presto KDE looks like Gnome now. So I can’t see the display configuration dialog to fix either one! At least I learned.

[vagrant sonnet]

Yaaay, I fixed it by blindly opening a terminal and running xrandr --output DP-2 --auto - --rate 60 seems like it should have worked but did nothing.

[quartz wren]

still experimenting with placement (held on by blue tape at the moment) but I think I'm on to something

complete with authentic apocalypse damage

I'm thinking IO plugs between, maybe shift the button panel left a bit and add a fourth column, not quite sure yet...

[quartz wren]

OMG how cool would it be to make a signal generator integrated into this that stores samples on magnetic tape?

I mean, yeah noise, but novelty

[delicate stream]

Noise can be fun

[quartz wren]

true, and can help debug a system that's meant to be noise resistant

see, I had this magnetic tape project a while back that I kind of want to pursue again. still have the hardware I printed for driving it from NEMA-17's

turns out when sitting right up against each other, their shafts' separation is perfect for compact cassettes

not sure if intentional or coincidence but it works out for me

[delicate stream]

I wonder if you could make your own tape...

[quartz wren]

was trying to make my own floppies at one point...

turns out laserjet toner is magnetic

[delicate stream]

Some is :D

But not all D:

[quartz wren]

and it turns out if you run plastic through a laserjet that isn't designed to go through a laserjet without properly securing it to a piece of card, it ruins the laserjet ;_;

the toner in my laserjet was for sure, when I put isopropanol on it, it pooled up and got shiny, then I stuck a magnet behind it and saw cool patterns

but uh...yeah that project died with my laserjet

along with a piece of my soul

my lunch meat has holes in it that look like a face

[delicate stream]

F

[delicate stream]

Lol

[quartz wren]

too perfect not to share

[delicate stream]

Haha

Frame it!

[quartz wren]

I should turn it into an NFT...

and yes, physical item was framed

in mah belly

I should probably start winding down for bed...it's almost 5AM

and then tomorrow I finish assembling the interface of this oscilloscope and break out / isolate the control lines for the beam

and then it's O-scope fun times

will do very minimal beam intensity in initial testing to be safe

anyway g'night all

[delicate stream]

Night! Or morning, rather XD

Sleep well!

[delicate stream]

I have a fool-proof, 100% effective way to not end up with yucky earbuds: get headphones

[late fulcrum]

I like your screen 😍

[jovial path]

It looks amazing. ✨ ✅ ☑️

[wooden schooner]

I see the filling fell out of your soup dumpling

[delicate stream]

Crazy way to mess up the planet: build an army of self-replicating robots that just take things, pile them in one place, but eventually dig up the other side of the planet and bring it to the pile... So eventually the planet has been entirely thrown off balance and deconstructed, only to be reconstructed as the pile.

Thinking this could be a SciFi story where an AI misinterprets a command like "bring everything here", not understanding that the human meant "figure out how to have all company operations function in this location/building"

[jovial path]

I'm making an YouTube live studying and the server stoped my video 3 times already. I had to begin a new transmission. It's pretty annoying, I do not think this happens often,

https://www.youtube.com/watch?v=FTLIS2YX5xI

It's already in part 4.

[hasty quarry]

@wooden schooner Turns out I took 10 milligrams

Let’s just say…

That was a good night

LOL

[delicate stream]

Sleep good

I no sleep good

[hasty quarry]

The two biggest things I have recently discovered I never appreciated enough are sleeping well, and drinking lots of water

I started taking water seriously. My god, it’s amazing. I can’t explain it, and I’m sure it’s not placebo, I just feel better generally

[tardy badger]

Ya know, scientifically speaking, the placebo effect is actually very beneficial to our health

[hasty quarry]

No way

[tardy badger]

Even if effects aren’t directly from healthy or perceived healthy habits, placebo effect helps our body produce the hormones and enzymes we need to be healthier and help improve the functions we are targeting

The thought of using crystals to help your mood or your “aura” actually does help improve mental health through placebo 🙂

That’s why a healthy mindset around any activity helps us make progress even if it isn’t physically noticeable

[hasty quarry]

That’s…very weird

I don’t know, I find it very weird that a purely psychological thing causes such physical reactions

[tardy badger]

https://www.health.harvard.edu/mental-health/the-power-of-the-placebo-effect

[hasty quarry]

To clarify I’m not disagreeing

[tardy badger]

I know, I’m just providing professional context 🙂

I don’t want to be spouting stuff without reference:)

[hasty quarry]

Right

[delicate stream]

Mind over matter. It's part of why folks who are active and won't stop moving in their 80s on tend to live longer, whereas people who sit back and don't fight against their slowing bodies tend to pass sooner

[tardy badger]

Yeah, I knew of a man who worked at a grocery store I went to a lot who was 105 when he retired. He lived for about 6 months when he passed on

[delicate stream]

That's a shame... At least he had a long life

[tardy badger]

He died happy

[delicate stream]

That's how I want to go. Happy.

[jovial path]

I want to be 105 still working. This person was amazing. I hope he's well in heaven right now.

[delicate stream]

By the time you're nearing 100, who knows, people might not be "getting old" until closer to 200

[tardy badger]

Lol maybe

[quartz wren]

Thank you, I'm really happy with how the project is turning out

[late fulcrum]

Let's just say I have a fondness for small CRTs

[delicate stream]

I'll give you a plasma rifle for the Watchman

[quartz wren]

Sooooooo @late fulcrum you willing to help me figure out how to directly drive the beam with a Pico?

[late fulcrum]

Are you using electrostatic or magnetic deflection?

[quartz wren]

Making an oscilloscope with software control of the beam so it can rasterise, vectorise, or trace

Magnetic

[late fulcrum]

For magnetic deflection, I'm just getting started: I'm looking at the tubetime.us approach of an op-amp driving a transistor booster with a current sense resistor in the feedback loop.

[quartz wren]

And it already has control circuitry I figure I just need to break out some bases on some transistors and feed signals into them...

[late fulcrum]

For vertical, yes, you can do that, but the horizontal circuitry is less flexible.

There's also limited bandwidth for vertical due to the inductance of the deflection winding.

[quartz wren]

Hmm... So I'll probably just have to redesign the control for the h coil then huh?

U think ua741 op amps will be sufficient

Or too slow?

[late fulcrum]

I'm looking at removing the existing yoke from the CRT and leaving it hooked to the horizontal circuitry (so it can produce the high voltage), and getting a second yoke for actual beam deflection, and modifying it for low inductance horizontal and vertical windings.

[quartz wren]

Hmmm that could work...

In fact if I disconnect the control to swing the beam entirely and inject my own steering field from another coil or electrostatic plate... Yeah... Might be feasible...

[late fulcrum]

http://tubetime.us/index.php/2014/05/26/crts-with-magnetic-deflection/

[quartz wren]

Ty for the link!

Hmmmm

[late fulcrum]

Design files are here: http://tubetime.us/index.php/2015/06/27/crt-magnetic-deflection-driver-design It uses an LM4765 power op-amp to drive the coils (I must have seen the transistor booster design elsewhere)

[quartz wren]

Could I stick another inductor in place of the yoke in the circuit with the same inductance so I don't have to wind another yoke or take it off the tube?

(to act as ballast for creating the hv)

[late fulcrum]

Theoretically, if the replacement inductor has similar capacitance and resonance (horizontal sweep circuitry uses the deflection yoke characteristics as part of the wave shaping circuitry)

[quartz wren]

Hmmm well it's worth a shot! Much easier to wind an inductor without a specific shape.

(as one needs for deflection yokes)

[late fulcrum]

Yeah, you don't need any particular shape or uniformity magnetic field for just a ballast.

[quartz wren]

Which would also allow me to pull the control board away from the tube a bit for better access

(since it won't be tied to the yoke)

Still will have the flyback connection and such but most of the connections directly from the original control board are short yoke control wires

Which makes board access a pain

[late fulcrum]

This one is testing out an analogue vector generator and electrostatic (instead of magnetic) deflection driver

[quartz wren]

@late fulcrum glad to know you are willing to give advice... Means that there will be less tears down the road

[late fulcrum]

Sharing experience makes it easier, more fun, and less frustrating for everybody.

[quartz wren]

Electrostatic deflection is easier but less precise, right?

If so I can make some plates for deflection and just use the original yokes as ballast

[late fulcrum]

Electrostatic deflection is generally simple and fast, precision can be obtained either way but it rapidly gets complicated due to assorted physical effects.

Normally external electrostatic deflection doesn't work very well, it's generally done with tubes that include the deflection plates.

[quartz wren]

Ah yeah that would make sense, get the electric field strength right up in there...

Might it be simpler to just rebuild the whole control circuit from scratch and play with hv a little?

[late fulcrum]

That's a great way to get started

[quartz wren]

I mean it's a socketed tube

[late fulcrum]

I finally scored a nice clear CRT where you can see the deflection apparatus easily

[quartz wren]

Oh nice!

I need to get a molecular diffusion pump so I can make my own tubes

Then they can be electrostatic from the get

[late fulcrum]

That would be awesome!

[quartz wren]

researches price and wishes he would ever have that kind of money...

Jk

Not researching prices

Would make sad

[late fulcrum]

It's possible to make a diffusion pump but my glassworking skills aren't anywhere near that level.

[quartz wren]

My glassworking skills are complete trash but that could be because I've only ever had a place to do it outdoors in the wind.

[hasty quarry]

You have glassworking skills at all?

[late fulcrum]

Yeah, I'm a neon bender.

[hasty quarry]

Woah

[quartz wren]

That will change soon though! I am building a lab

If anyone is curious about how that's going

Yes it is smaller than a single car garage but it is like 3x the size of my old "lab" and will have walls and a non leaky roof

(old "lab" is a lean to off the back of a tool shed)

(and I only had enough shingles to cover half the roof)

But this one is gonna be sweet

I have permission to build a couple small particle accelerators and a fume hood :D

[delicate stream]

@late fulcrum Oh, random question... Have you ever heard of/seen Warehouse 13?

[quartz wren]

Actually the permission I got when I asked was "it's your lab set it up how you want inside"

Like this is the most freedom I've ever had on designing a work space and I'm gonna go all out

Camera gantry on the ceiling for sweet vids, some particle accelerator experiments, lots of chemistry I couldn't do (or I guess shouldn't have been doing) in my bedroom and will have CNC PCB manufacturing in-house

[late fulcrum]

I've heard of Warehouse 13, but that's about it.

[delicate stream]

Ah. Well, there's a gadget I was hoping you might be able to help replicate...

[late fulcrum]

Ah yes, camera provisions for vids are nice

[quartz wren]

I'm going to use extra 3d printer pieces to build a 2 axis gantry with a 2 axis swivel head covering as much of the room as I can

And programmable / software controlled via gcode

[delicate stream]

So they have this communication device called a Farnsworth [invented by none other than Philo T. Farnsworth], which is basically a video phone with a CRT display. It's a bit bigger than a modern cell phone, but that would be one tiny CRT -- have you ever seen a display like that, a small, circular, basically flat CRT?

[late fulcrum]

I just have a tilt/swivel camera on a fixed mount

[quartz wren]

So I can either program cinematic shots or move the camera around for streams or have it follow me

[late fulcrum]

All the flat CRTs I've seen are rectangular, but you could mask off a circular opening

[quartz wren]

There are crts that use an angled phosphor plate and the beam going 90 degrees to normal

Would probably work for this

[delicate stream]

Any that small? And how much power would that suck, anyway?

[quartz wren]

https://youtu.be/65ENph8sV-0

This style

[delicate stream]

Durr, I totally forgot about that, madbodger even showed one a bit ago XD

Yeah, could use a display like that, mask it, and have a lens for the round bump look...

[quartz wren]

Really all you need for the bubble effect is one of them cheap plastic magnifiers

(the thin ones that barely magnify)

[delicate stream]

Yeah, just needs to look like the screen is a dome, doesn't need to buldge the image

[quartz wren]

Yep which is why I suggested plastic

Has a lower ior

(than glass)

And less likely to break catastrophically

[delicate stream]

Any idea what the power consumption is like?

[quartz wren]

No clue but I'm sure Dave on eevblog does the breakdown in that video

(tends to be what he does)

[delicate stream]

I'll have to watch later...

[quartz wren]

Looks like it depends on model

But average seems to be about a 200w filament

Not sure about other power consumption

[delicate stream]

Oof

[late fulcrum]

I think it's a few watts. It's a hybrid tube, with magnetic deflection for horizontal and electrostatic for vertical.

[quartz wren]

mW

[delicate stream]

Oh, I was gonna say XD

200W seems impossible for a battery device to handle in that size from that era

[quartz wren]

I read wrong lel

[delicate stream]

lol

Just wondering if I'd be better off with an LCD...

[quartz wren]

Oops

Yeah you might be

I had an idea last night

For emulation of a crt using an lcd

[late fulcrum]

Round LCDs exist too.

[quartz wren]

Just emulate the scan pattern and fade the pixels out after placing them

But within the timing cycle of a frame

So it has that soft glow feel

Would need to be back lit to look right

And would actually look best on OLED panels

Because true blacks

(if you choose, or any offset "black" you want to assign)

Anyway OLED programmed to emulate a scan and the POV of the phosphor could work well

[delicate stream]

The only thing is resolution -- it might need to be really high resolution to keep from looking vs. a CRT

[quartz wren]

Yeah this is true...

Could always invent a new display

[delicate stream]

lol

[quartz wren]

Honestly though in that picture you shared it almost looks like eink

[delicate stream]

I'd need to practice my glass blowing, but I could probably make a fully custom CRT...

[quartz wren]

Yeah I've got custom crt plans in the works but I don't has low vacuum

So I'm just playing with tubes someone else made

[delicate stream]

I need to fix my vacuum system too XD

[quartz wren]

I really want to make a crt with a canning jar and phosphor pulled from scrap

[delicate stream]

heh

[quartz wren]

Just for the apocalypse factor

[delicate stream]

that'd be pretty sweet

[quartz wren]

For now best I can probably manage is a plasma globe with the kind of vacuum I can achieve...

(turns out you can get a fairly decent starter vacuum pump out of an old fridge)

But yeah for the apocalypse tube I definitely want to build all of the precursor infrastructure from scrap too

Because I'm researching for a book series called "how to survive an apocalypse"

[delicate stream]

My vacuum chamber could do near perfect... but the one pump mount imploded and I need to fabricate a new one DX

[quartz wren]

The third of which will be called "how to thrive in the apocalypse"

And will go over rebuilding tech from scrap

[delicate stream]

I know how to make large-pixel LCDs :D

[quartz wren]

I can make a matrix addressed led panel display am I special?

[delicate stream]

Only if you can make the LEDs yourself :P

[quartz wren]

I mean...

That's going in the book

When I figure it out

[delicate stream]

lol

[quartz wren]

Much easier to make a crt in the apocalypse though

[delicate stream]

Most of my apocalypse focus is on tech preservation and building weapons, as well as infrastructure support for surviving tech [power production/storage/conversion, mostly]

[quartz wren]

But if my atomic scale 3D printer (the main thing I need a super high vacuum for) works out it should be something you can build if you've got crt manufacturing tech

Weapons are easy

[delicate stream]

Railguns can be tricky :P

[quartz wren]

Also not essential :P

[delicate stream]

But they have unlimited ammo if you build them right

[quartz wren]

However computer controlled turrets made from scrap electronics...

That's a bit more useful and requires preserving the knowledge of how to build that infrastructure

Or a complete rediscovery of it

Which could take who knows how long

People will always find ways to make weapons from what's around. That's inevitable. We need to preserve the progress we've made on technology if we want weapons to not be the only tech race that has any progress during an already vulnerable time for humanity

Heck, even if there's no apocalypse, if we don't preserve, learn, and teach how the infrastructure the world is now based on works, then the grey beards will eventually pass on with that knowledge and we will be stuck with mega corporations controlling the whole tech sector. I'm not letting that happen.

We need to open source all the modern infrastructure information if that means reverse engineering or re-engineering to be simple enough for a given individual to want to try and understand it. Otherwise we get to a point where the only ones who know how to make high tech things are the giants because they hoarded knowledge and made things far more proprietary than they should have on purpose to prevent others from being able or willing to work in harmony and we get fragmentation and then those fragments are guarded from the other fragment holders and everyone else. If we don't open source the infrastructure or build a new one with open source materials then humanity's tech journey will stagnate, backslide, then eventually come to that conclusion anyway

^opinion, and a strong one at that.

[delicate stream]

We're just gonna have technomages be the ones who create and modify tech

[quartz wren]

I feel like I'm in the path to purple robe technomage...but there's a long journey ahead

[delicate stream]

You get purple, I get red

[thick wind]

Following your opinion with another opinion: I think that most commercial infrastructure is simple enough to handle in a post apocalyptic scenario, given the clearance to access the controllers. Security is the main reason for a lot of these technologies not being open source, as ransom ware grows in scale and countries attempting to steal each other’s military tech.

[delicate stream]

not that the closed source infrastructure tech is secure

[thick wind]

In contrast, tech from companies like apple probably aren’t important enough to need

We have open source alternatives for that

[quartz wren]

Right what I am saying is we will eventually settle on those as they are the most long term viable for future generations being able to understand, fix, and reimplement where needed but until then we're going to have a period of tech stagnation as large companies hold more and more power over the higher tech manufacturing processes and at a certain point it won't be accessible to enough individuals to keep those companies going due to inflation/wage divergence and then the open source solutions are all but required and if we don't head it off we will have a backside between stagnation and the inevitable open source future

[delicate stream]

I think rather than making the big stuff open source, we need to try to decentralize things, make them more ad-hoc -- instead of having power grids that can go down and take out huge population areas, imagine if every house had some storage and production, and then the neighborhood level had its own smaller grid, which tied into a larger unit... but all set up in such a way that you can't have a simple cascade failure or have a substation outage 50 miles away cause an issue in your neighborhood

[quartz wren]

We need in-home chip fabrication technology. Don't worry I'm working on it but I need high vacuum.

[delicate stream]

You can make 8086 grade parts at home :D

[quartz wren]

Yes but I want to 3D print MEMs devices at the atomic scale with an ion ray tube

[static flare]

I want to get into bespoke chip fabbing just for custom stuff (as I think it would be neat), are there tutorials on that?

[quartz wren]

I found a video somewhere about in-home chip fabrication lemme see if I can find it again

[delicate stream]

I saw a guide of sorts on it, lemme find it

http://sam.zeloof.xyz/category/semiconductor/

[quartz wren]

https://youtu.be/IS5ycm7VfXg

This guy goes into a lot of detail on his process

[delicate stream]

Lol, that's the same thing XD

Mine was just his blog writeup

[quartz wren]

Ah I guess I just prefer the video form as I can read and listen at the same time

(I do a lot of multitasking)

[delicate stream]

I like text because I can read and listen to music and do something else at the same time :P

[quartz wren]

I have a hard time focusing on text without some voice in the background

And I end up absorbing both much better

(well, text on a screen)

[delicate stream]

I just sing while reading XD

[quartz wren]

Unless I'm reading / writing code... Then I need no words in my ears LOL

Turns out concretion and abstraction are in a bit of a tense friendship

[delicate stream]

I'm abstraction

[quartz wren]

I have schizoaffective bouts (induced by bipolar as far as I can tell) so I tend to blur the line between concretion and abstraction and traverse the spaces in between with impunity

Helps a ton with concept transposition

But annoying when I keep leaping to incorrect conclusions

It was super helpful while learning deeper math because I could see abstract connections others were oblivious to

[delicate stream]

I'm a crazy cat with a list of things wrong with me and sometimes get very, very distracted

[quartz wren]

I get distracted very easily when I haven't had my medicine... Unfortunately it isn't covered by insurance because it isn't federally legal.

[delicate stream]

F

[quartz wren]

(yet, though I'm not holding out hope in my lifetime)

[delicate stream]

if you're in 'murica... might not be that far off

[quartz wren]

Only because the states forced the feds' hand

[delicate stream]

mhmm

[quartz wren]

In my state it's legal but I have state issued insurance because poor

So won't be covered because regulated federally

[delicate stream]

bleh

[quartz wren]

'murrica

[delicate stream]

'murica be nutty sometimes

[quartz wren]

I just want a floating barge in international waters with a garden and a plastic -> fuel converter so I can clean up some of the mess the species I was born into made... Is that too much to ask?

[delicate stream]

No, just gotta build it XD and then watch out for pirates...

[quartz wren]

I mean at that point I would legally be one.

according to international treaties.

because ain't no way I'm going to fly a flag of a country that doesn't support me when I'm out there.

[delicate stream]

I think you have to raid other ships to be a pirate

[quartz wren]

okay then I've been misinformed. Just looked up the legal requirement for it. it must include violence for private ends without authorisation of a port authority

[delicate stream]

Thought so XD

[quartz wren]

here's the thing, if pirates come and destroy what I build then humanity doesn't deserve it.

not my problem at that point as I would have done all I could.

[delicate stream]

I mean it would be your problem if they violence'd you out of existence

[quartz wren]

no, because I wouldn't exist to have a problem.

I love mother earth more than life itself and if giving my life in service of protecting her is what is needed then so be it.

I can't sit and watch our collective mother be poisoned by my brethren and do nothing.

[delicate stream]

Time to build hugbots to subdue troublemakers

[quartz wren]

no, it's time to take money out of politics and put people in. no more robots.

we have enough of them in power as is.

[delicate stream]

Well... Good luck, I have no idea how to accomplish that

[quartz wren]

and that's why I'm leaving at the earliest possible convenience.

gonna build a barge to the pacific, recycle the garbage patch into rocket fuel, build a rocket from shipwrecks and get out of here

anyone willing to help is welcome aboard.

[delicate stream]

Rocket fuel robots!

[quartz wren]

but of course, this is merely fantasy as it would never be allowed by the ruling elites.

apologies for steering this channel into the ground, I'll go

[delicate stream]

I mean, this is offtopic, it's not like you can't talk about random dreamy things XD I've had similar dreams

Hugbots were one of my ideas -- build robots that can literally hug anyone into submission, use them to subdue anyone who won't agree to my rule, and step into power that way... nobody would be hurt in my takeover. Crazy idea.

And then everyone would have to listen when I told them how to fix the planet XD but I'd find actually smart folks to help me

Politicians would basically end up in locked-up hotels out of the way where they couldn't cause any more trouble

[quartz wren]

sooooo...Baymax?

[delicate stream]

Yes. But huggier. Also basically indestructable.

[quartz wren]

blegh...I'm exhausted and am out of medicine...today is going to not be fun and I foresee nothing getting done.

can't even think about what I want to do long enough to formulate a plan on how to do it, let alone implement that...

maybe I'll put in a bit of work on my lab...get some of the roof framed in

[delicate stream]

I'm exhausted and thinking about going for a walk before it rains again...

[wooden schooner]

https://en.m.wikipedia.org/wiki/Ship_of_Theseus (in case haven't seen)

[delicate stream]

The difference with my idea is that the planet will not end up being the same shape afterwards, just the same mass XD vs. the ship being new mass but same shape

[static flare]

Well that's... a lot more specialised than I was expecting

[delicate stream]

beep

[static flare]

The fabbing

[delicate stream]

I figured XD

[static flare]

I mean, it's not like heaps of equipment but more than I can realistically afford so I'll just stare curiously

[delicate stream]

I don't have the time DX

[wooden schooner]

New mast?

[delicate stream]

The Ship of Theseus involves a ship having pieces removed, replaced with new material. The ship eventually is all new material [mass] but the actual ship is the same configuration of parts [and the old parts can be a new ship]. I'm talking about just moving all the parts of the planet... More like putting the ship into a giant woodchipper and turning it to a pile of wood chunks.

[wooden schooner]

I was making a mass/mast joke

I get that your thing is indeed distinct 🙂

[late fulcrum]

Relevant to your interests: https://www.youtube.com/watch?v=SrNVLCHrJtY

[quartz wren]

Yes relevant but out of reach.

[quartz wren]

Plus I want to find a way to make one of them pumps from apocalypse scrap as it's integral to the second book "technological revival in the apocalypse"

Not only that but all of the bits required leading up to it. Part of the reason I'm building a lab.

Yes, lots of work, but glass and metal working have been around a long time.

And if I can manage to get some of my wilder ideas working would directly lead to making some more advanced tech early in the tree...

Just have to have all the pieces in place in the right order

[jovial path]

https://youtu.be/qiALGL79w3A

Marathon in Canada. It looks fun.

[drowsy zephyr]

im currently trying to search for jobs at linked in
but putting in electronics only bought up computer programming related jobs rather than electronics
im suspecting that electrical engineers in my country are close to useless for now, they all want coders or data analysts

is there a way to search for jobs outside of my country

[jovial path]

Why don't you apply to your local eletricity supply company?

Most of the companies needs electrical/electronics engineers.

[drowsy zephyr]

humm, power engineering huh

idk if it'll be in my expertise to work there

[delicate stream]

Oh, I thought you misread and were confused or had a typo XD

[hasty quarry]

I still think it's funny how "Oh, we can't find the derivative from just one point, because that doesn't make sense. Then we'll use 2 points, and squeeze them together so hard they might as well be one point"

[delicate stream]

https://tenor.com/view/doug-maclean-mac-kyper-kypreos-nick-kypreos-gif-22264825

[jovial path]

I have to do some great electronic project with a single finger pointing at light. Something like the image.

Something to inspire people to be great.

It can be the principal simble of my robot.

A finger pointing at a light.

@late fulcrum what do you think?

Actually it's already decided.

It is the simble(etc.) of the robot(s) that obeys commandments from parents(in the case my parents). It is this forever.

[vagrant sonnet]

Terrible but wonderful idea: get air intake without opening my windows by running the bathroom exhaust fans backwards.

[delicate stream]

Simble?

[wary herald]

I like the idea

[wary herald]

Symbol??

[jovial path]

Yes, like the logo.

Like the G in Google.

Or Google in Google.

[delicate stream]

Ah, yeah, symbol

Unrelated, bought a couple cameras

[tardy badger]

Nice

I made forbidden popcorn

Aka accidental backwards capacitor

[burnt tendon]

Well don't just sit there looking at the forbidden popcorn, get some butter.

[jovial path]

but it's literally a lamp of light (turned on).

[wary herald]

Yay

[wary herald]

Oh, no

[wary herald]

🔦

[wary herald]

More like 7 cameras

How expensive was that??

Vivitar??

[delicate stream]

Actually 50 of them XD $2.99 each! And yes, Vivitar!

Bbl driving home XD

[wary herald]

Wow! Whatcha gonna use em' fer 😉

[grave crest]

That's a good deal

[quartz wren]

Hello friends!

I have decided on something (with inspiration from some external consulting) for my oscilloscope that I think you folks will really like. The button pad will have a rainbow ribbon cable running into the box and since I don't have any actual budget for the oscilloscope I will be crafting it by hand from scrap wire because I have plenty of that in all sorts of colors

Going to use clear packing tape to hold them all in line and break out the ends for soldering to the circuitry

It's not going to be fun but it will look really sleek

Shouldnt be terrible as I only need a few inches of cable

I think today I'm going to dismount the tube, make a development mount for it, and get the rest of the interface planned and holes punched

Then once it's in the development mount I should have better access to all the connections and be able to start learning how to drive the tube

Really wish I had a good signal generator but luckily Pico can be configured to do that with PIO and a handful of scrap resistors

And I have one on headers in a breadboard so I can just set it up for different applications until I settle on something and then I'll use the non-mangled Pico that doesn't have headers on it straight on the final board.

So glad I got the max 3 I could get when I had money for them haha

Because once I get the oscilloscope done I still have one on headers for the game console and I wanted that socketed anyway

And one for Yolo experiments

Because

A Teensy would never work in this condition I broke 2 under normal soldering conditions

Of different designs.

Which means it's just a bad idea to try and pack 6 layers and a crapton of peripheral hardware in such a small place

❤️ Pico the little trooper

Pretty sure it's only 2 layers but it's at most 3 (will check later) because I could easily see the traces on the other side through gaps on the side I was looking from with light on the other side of it

Which makes sense why a razor blade between the layers did nothing

"look at me wrong and I'll fail" - Teensy

"it's just cosmetic" - Pico

[tardy badger]

Forbidden butter only (flux)

[quartz wren]

Forbidden butter + forbidden popcorn = forbidden magicks?

[delicate stream]

Guess! Hint: all will go into one rig

[delicate stream]

I know right?! They're normally $29.99! They're HD, and they're "ok", but for $2.99 a piece that's incredible!

[grave crest]

@delicate stream How'd you manage a deal like that?

[tardy badger]

“Why is this not powering on 😭” probes Schottky diode “ah yeah.. gotta go the other way”

[wooden schooner]

forbidden popcorn + forbidden butter = Flux Capacitor

[hasty quarry]

Why are old historical documents so garbage

They are horrible to read, the english just...

It's so frustrating. It looks like I should understand, but the way they organize ideas, their vocabulary. It's so otherworldly

[thick wind]

In 200+ years, people may think the same of our documents lol

[burnt tendon]

"Gosh, I wish those 21st century people would communicate in some form other than memes."

[hasty quarry]

I don't believe memes are going away

[tardy badger]

2 down, 18 to go

I was going to do 25, but realized I only had 22 capacitors for the NEOPIXEL

[tardy badger]

https://tenor.com/view/great-scott-surprised-amazed-oh-my-shocked-gif-16490502

[delicate stream]

That's just the deal!

[delicate stream]

Memes are the only galaxy standard language from about 2380 to 2728

[burnt tendon]

https://tenor.com/view/star-trek-darmok-his-eyes-uncovered-jalad-gif-16441088

[delicate stream]

Darmok and Jalad on the ocean!

.... I wonder if anyone has tried to craft a ConLang around the idea of the Tamarian language

[vagrant sonnet]

Oh for real? I’ve been wondering about getting a non-garbage webcam. I hope my local Microcenter has the deal too!

[delicate stream]

Good enough to show your face! 720p, good enough!

[static flare]

@delicate stream What are you planning on doing with 50 cameras? Are you making a 3D scanner?

[delicate stream]

Bingo! You get 1000 points!

[static flare]

Basically the only thing I could think of that used that many cameras simultaneously

[delicate stream]

Lol, I could have been putting them all over my house to record everything 24/7... :P

Now I just need to figure out how to take pictures from 50 cameras at once

[static flare]

I mean, I think 50 might be a little overkill for one house, unless you're living in a huge place

[delicate stream]

Gotta have all the angles, yo

[static flare]

haha

[delicate stream]

Any idea how to take pictures from 50 cameras at one time? XD

[thick wind]

50 raspberry pi boards with timed jobs…?

What, are you building a giant 3D scanner?

[delicate stream]

I don't have $1250-1750 for a Pi collection that big XD

[delicate stream]

Yiss

Well... Not giant? But 3D scanner

Take pictures from all angles at once, feed into magic software, boom, 3D model

[thick wind]

Does it need to be simultaneous tho

[static flare]

Maybe not exactly but it's usually a good idea to have them at about the same time, for lighting and movement purposes

[thick wind]

Because sequential capture can be handled by a single board with enough hubs lol

[delicate stream]

Could be sequential, it'll be non-moving things, I just don't know how to make it happen automagically

[thick wind]

Actually that’s the main reason why simultaneous capture is usually avoided in 3D scanners

[delicate stream]

I plan on having a lighting rig, and it doesn't need to be done instantly, I just don't want to have to manually do every camera

[thick wind]

When one camera has optimal lighting, the camera opposite has really poor lighting

[delicate stream]

Unless everything is lit equally

[thick wind]

You’ll need a lot of diffusion to manage that and filter out the cameras opposite

[delicate stream]

Gonna do this, but smaller, and stills, not video, basically https://www.youtube.com/watch?v=umyglbDr4IE

[thick wind]

I know of a project that uses up to 7 raspberry pi cameras and a servo controlling a turntable

[delicate stream]

The software I'm using needs the subject stationary

So turntable is out, otherwise I'd probably use like 5 cameras in a line

[thick wind]

Stationary? It doesn’t pause between position transitions?

[delicate stream]

As in the object shouldn't be moved between images -- it messes with the process

[thick wind]

Ew

[delicate stream]

It uses the backgrounds to help position the cameras in 3D space

photos

[thick wind]

Oh that’s some fancy stuff

Okay

[delicate stream]

Open source fancy!

[thick wind]

Maybe have the cameras and raspberry pi on a moving rail instead?

Stationary table and revolving cameras…?

[delicate stream]

I figured all stationary cameras would be more stable... plus I don't feel like driving an hour to return the cameras. And a stationary rig is easier to build. Plus no worry of wires dragging and catching when things move

[thick wind]

I guess with software like that lighting is less of a concern

[delicate stream]

Yeah, doesn't need to be super even

Just don't want crazy shadows

[thick wind]

So then you have like 40+ cameras, and the software doesn’t manage them for you?

[delicate stream]

You load images into the software, it's not meant to take the pictures itself

[thick wind]

Ahhhhh

Okay I’m starting to understand this better

[delicate stream]

https://alicevision.org/#meshroom

[thick wind]

In my eyes, the easiest way would be to use opencv in your preferred language of choice to capture an image from each camera. It’s sequential, but it’s automated, customizable, and straightforward.

You write the program once and just fire off every camera with that, and if your software has some sort of terminal access, you can potentially use that to feed the images directly into your software?

[delicate stream]

Meshroom [the software] can do live rendering from a directory as images are put in, so I could have OpenCV save to a common directory and watch it happen

[thick wind]

You could play with other prebuilt programs, but I don’t know how many programs are designed to handle that many webcams at once

[delicate stream]

Yeah, That looks like the way to go. Now I just need a bunch of USB hubs for cheap, lol

[thick wind]

https://www.amazon.com/Sabrent-Adapter-Control-Switches-HB-U14P/dp/B00HL7Z46K/ref=mp_s_a_1_3?crid=28VIO9DSVDFJO&dchild=1&keywords=16+port+usb+2.0+hub&qid=1630273653&sprefix=16+port+usb+2.0&sr=8-3

That’s probably the best balance of price and convenience you’re going to get haha

[delicate stream]

That's not bad, about 30% cheaper than the 7 7-ports I was looking at

Sabrent does good cheap stuff

Would only need 4 of those

Gotta wait for the next paycheck XD

[thick wind]

Yeah price can come down a lot once you pull the 3.0 compatibility

You just need a powered hub to handle that many devices

[delicate stream]

At Micro Center they had 7-port 2.0 hubs, but they were $14.99, and I'd need like 7 of them

[thick wind]

If I had my pre-pandemic access to Chinese electronics, I’d get you a bunch of 8-port hubs for dirt cheap

[delicate stream]

Haha

[thick wind]

Sigh, I miss those days.

[delicate stream]

F

I wonder if a Pi could handle this job

With 4 of those 13-port hubs, I could connect all 50 cameras and a mouse and keyboard

[thick wind]

I picked out the 13s assuming it was for a pi haha

[delicate stream]

lol, noice

[thick wind]

I know it can handle the image capture, but the photogrammetry is a different matter…

[delicate stream]

The processing side 100% needs to be on my workstation -- Meshroom took a while to try 20 pictures from my phone, lol

It's like... 10000x the processing power? XD

[thick wind]

Lol yeah, just capture 50 images and send them to your workstation

[delicate stream]

Yeah XD

I need moar powah

Actually, I should try Meshroom on the other workstation...

Not sure if it prefers GPU or CPU

Also not sure about memory bandwidth preference

[jovial path]

The majority of my clothes doesn't have any drawing on it. They are like blue blue or gray gray, or other colors.

I just noted now.

I like simple :).

It feels light.

[delicate stream]

The majority of my clothes are graphic T-shirts, lol

Uhoh

What is going on

[wooden schooner]

Hey, the progress bar didn't grow between 126% and 130%! What gives?

[delicate stream]

It stopped growing at 100% :O

I think the imager got derpy from being left open... restarted and it worked fine

[quartz wren]

Oh snap I need this for my lab how get

I'm going to have a camera on a gcode controlled gantry and several static cameras around the room

As well as using my phone for handheld shots

[hasty quarry]

Can I have some help coping with steady loss of motivation?

I find I’m not as enthusiastic about programming and electronics as I was a while ago, and it’s a bit depressing

I don’t really get what’s going on

I’m completely mentally stable as far as I’m aware, no issues at all on that front, but I wanna know what has me dreading the field a bit

[tardy badger]

Discipline will take you further than motivation ever will

Or that’s what motivational speakers say

[crystal ore]

The best insight I've run across is that motivation follows action rather than causes it. You get some momentum and get some enthusiasm for it after you take some baby steps and begin working on something. But a blank page is very intimidating, and waiting until you feel in exactly the right mood to tackle that will make you wait a long time.

[quartz wren]

Will retake without the potentially not family friendly item in frame...

After a bit of brain surgery on the CRT

Left the flyback transformer connected because I'm thinking I'll reuse it and build circuitry around that specifically for the HV then just drive the yokes directly and separately from custom circuitry too.

May need to remap the wiring on the yokes depending on how they are layed out too

(based on initial assessment)

For now though I'm just figuring out placement and casement

And no I'm not working in the basement... Because we don't have one lol

[late fulcrum]

Excellent!

[quartz wren]

Aaaaand back in the original bracket for prototyping the control circuitry

Assuming I haven't broken it

But I heard no hisses or pops so it hasn't lost vacuum that I know of and worked right before putting it in the oscilloscope case (at least was scanning and generating a beam which is all I care about)

So yeah I'm thinking op amps and MOSFETs for mixing and driving the control signals from inputs and their associated software control to beam control. Going to have not just software / direct signal controlled scanning that's software selectable between those options but software mixable

That way you can have some percentage of control for each axis and the intensity be coming from direct signals and the Pico at the same time. For very custom modes

Probably only with 8 bit precision on the mix though

So 16 bit precision on each axis and pwm for intensity plus 8 bits of precision for mixing for each of those with a direct signal input

Also I was thinking... Why not just extend the register space and add extra DACs for analog signal generation

Just one more pin required for every doubling of the space

I could even multiplex the register data and address lines if I got fancy and save signals while getting 256 analog output addresses at 8 bits of precision each

A bit overkill but would allow me to use some of that register space for digital signal gen as well...

Without using extra pins

Then just use all the rest for inputs

So if I go that route I need 8 pins for multiplexed address and data to all the output registers, then a pin to tell the system whether it is an address or data (for simplicity and ease of no - standard control via software) and a line for whether it is a read or a write, which makes me realize I can use that to determine whether it's an output register or an input buffer and have up to 256 8 bit input ports

Also it allows me to use some of that address space as coprocessor IO which is nice

[hasty quarry]

Well said

[quartz wren]

(again with fewer pins than I was already going to use)

So I only need like 11 of the 26 pins for IO control, 1 for pwm of the beam intensity which I may just drive through the LED pin to keep things simpler, 3 pins for dedicated analog inputs and the rest can be used for... Whatever really...

I guess fast digital analysis

For systems that are externally clocked rather than from the signal generator off the IO

Oh and there's still USB

Oh so I guess I'll use some of those pins for the standard serial connections Pico has onboard for things like SD access and such.

There job done I have all the Pico's actual IO figured out on the abstract scale... Now for a week+ of implementation time...

Results will be very worth though.

@late fulcrum this will be capable of outputting any standard video signal it gets up to some insane resolution plus much much more when I'm done.

Heya @jovial path hows it going?

Been a while

[jovial path]

Hi, I am fine.

[quartz wren]

This is good to hear :D

See my oscilloscope+ project I'm working on?

I call it "Picoscope"

Also I just realized I can mount my new board right where the old one was when I'm finished making it and use this bracket it came in, even if it doesn't fit one way I can flip it around

And since I'm doing direct beam control that is a simple fix in the op amp setup and software control to counter... Or I guess just flip the vertical yoke wires...

Wait I guess I'd probably want to do both

Or heck I can just flip the tube in the bracket and accommodate the flip with my component placement on my board

Only thing that really matters is the flyback transformer

Everything else is flexible

In fact gonna go ahead and see if the bracket fits as is or if I have to flip it then if I do just go ahead and flip it now so I don't forget later

And just remember during prototyping that it has a 180 degree flip

Sweet I left enough clearance to leave it as is :D this day just keeps getting better and better

Next step on the electronics is to borrow my dad's solder sucker so I can more safely extract the flyback transformer

Then the tube will be completely free from the board

Oh yay it has a label on it!

That means I can probably find information about it on ze interwebz

But for now it is case mod time so I can get it how I want. Should have checked center of mass for handle placement when I had the tube in but I think I'll just center it and balance it with ballast weight later

And thinking about it I think I can take the handle off the (now) back panel with a bench grinder

And not risk the angle grinder

[late fulcrum]

You can often get data from service literature from the set it came from, and pinout by simply eyeballing it.

[quartz wren]

I meant the data for the flyback transformer to get specs from a datasheet

also noice lovely pics

I've got part of the interface layout planned out 😄

decided to throw an FPGA dev board on top for the heck of it

might as well include the kitchen sink if you know what I mean

[quartz wren]

I just found an LCD panel that has clock-style segments with up and down arrows, and I think a couple other things on it

it's the kind that goes transparent when connected and dark when idle

so I'm going to put some RGBW LEDs behind it and do a custom backlight and add that to the scope as well

no idea if I'll ever use it but could be cool if I steal the RTC chip from this old toshiba laptop

[quartz wren]

okay most of the holes are punched for the switch interfacing and I gave it a fresh coat of paint

will do the handle mounting when this dries so I have the paint completely covering the can

Going for a less off-putting green for the can and a nice bubblegum for the handle

So I can grab it from my peripheral easier

More like toy army person green rather than actual military green

Then I'll probably paint the angle brackets for the handle separately and then assemble it all tomorrow :D

Ooh I still have some holes to punch for the arduino robot screen I'm adding and the ribbon cables from that and the button panel

Then I'll touch those spots up, then mount the handle

Probably a bit forward from center to account for the front heaviness of the CRT

[quartz wren]

Aaaaand tube completely extracted for experimentation and prototyping

Borrowed a solder sucker from my dad to get the transformer out without any swears

Heh

Might be able to use some of the active components even :D

I think what I'm going to do since it is so well marked is take out all the components and write down their identifier on the board and the associated value

As I go

Then I can scan in the board and do trace analysis to reverse the schematic

[quartz wren]

Well shoot... Looks like I'm going to be figuring out how to get my dad a desoldering iron for Christmas... His solder sucker fell apart in my hands while I was using it so I'm gonna figure out how to get him an upgrade

And he does a lot of desoldering so I know it will be a huge benefit to him and I can borrow it without fear of it crumbling to pieces due to being as old as me...

Pretty sure I just destroyed what was basically a vintage family heirloom...

Repaired and repaired until it couldn't hang on any more

¯\_(ツ)_/¯

Wasn't on purpose

Had permission to use

Dad seemed to be a good sport about it

[delicate stream]

It was 39C when I went to sleep last night

Am cooked

[grave crest]

Solder suckers, even nice ones, are occasional use tools. Hakko makes a nice entry level desoldering iron — check hakko’s direct site as well as TEquipment.

They’re not inexpensive compared to the manual solder suckers though.

Consider using braid too, it can be just as effective depending on the case.

[delicate stream]

I use braid if I use anything, lol. Sometimes I just use a needle or razor blade tip to scoop out solder

[tardy badger]

(Unrelated to any conversation here)
I’ll say it once, and I’ll say it one hundred million times…

Screenshots of news headlines don’t prove points, and lack in context which invalidates arguments.

There’s a screenshot going around trying to highlight that the vaccine doesn’t work because 95% of Israeli hospitalizations for severe covid are among vaccinated persons.

The context to that is they have a very small 3.4% positive rate on covid tests, much lower than the 16%+ in countries with significantly Lower vaccination rates. Not to mention only <10% of positive cases are severe.

Social media frustrates me to no end sometimes

Anyway, getting off my horse now

[tardy badger]

Razors? 😳 seems a little dangerous

[delicate stream]

I have razorblades everywhere and use them for everything

Just gotta be careful

[wooden schooner]

my desolder process [edit: through-hole, haven't done smt] has ~always gone like this:

• melt the solder and pull the part off
• add a glob of solder so that the pad becomes a dome
• solder sucker
• if it works, great. if it doesn't, then there is probably a piece of something stuck in there, like a wire strand.
• in that case, solder wick it off
• then repeat the solder glob + suck

[late fulcrum]

Data for flyback transformers is often hard to come by, I end up buzzing out the connections on my own and using a test winding and inductance meter to estimate the turns ratios. Note that with the common integrated rectifier flybacks, you'll need a fair amount of voltage to forward bias the HV rectifier.

Having the service literature is also a great help

[static flare]

I'd be careful using anything to "pry" solder, it might pry the pad underneath off with it

[jovial path]

https://www.youtube.com/watch?v=vjIdYm67vd4

[jovial path]

The single thing that bothers me a lot about Tesla. This is like a small bad "infinity" to me.

they could mix the models and avoid this.

Then it touches NASA...

I am sorry(preferably not at all) if I'm a square.

[crystal ore]

Unfortunately there was a prior car called the Model E, so Tesla had to compromise on Elon's master plan.

A trademark dispute with Ford, apparently.

[jovial path]

https://tenor.com/view/really-shrug-seriously-james-little-james-gif-11213198

[late fulcrum]

Apple ran into a similar issue with the Macintosh. The follow-on to the SE would normally have had "X" added (like the SX), but they changed the naming convention for that one.

[delicate stream]

They did this on purpose because they're run by a child

[jovial path]

Kids that obeys their parents doesn't behave badly. Really.

Neither say adult words...

At least... At least from my family.

my family isn't world's family

And I believe there are more than 1 billion different parent's commandments from different families.

[delicate stream]

I mean, yeah, good kids are good?

[jovial path]

I don't know.

[jovial path]

There are more than 7 billion people in the world right (2011) ?

[delicate stream]

Almost 7.9 billion

But most parents probably have the same general sets of rules

[jovial path]

Then a kid that behave badly according to your theory.

[delicate stream]

Elon is literally a child in an adult body XD

[jovial path]

well he should obey his parents then.

many kids do this.

[delicate stream]

...I have no idea if his parents are even alive

[jovial path]

he can remember what they taught him.

[delicate stream]

He definitely remembers the "how to make a lot of money" part

[jovial path]

what about NASA's image

I think this is bigger than money...

[delicate stream]

NASA is always at least a little about money, but yeah, they're mostly folks looking to actually learn and explore

[jovial path]

Look at the word at the website.

[delicate stream]

Tesla is about being appealing and making money

[jovial path]

Now what do you think about saying this inside a school ? Like what everybody do with NASA.

In high school I searched for school projects at NASA website.

[delicate stream]

Not sure if they still do stuff in schools... Haven't followed them that closely in a long time

[jovial path]

Nasa was always polite, and there wasn't any adult words on it.

[delicate stream]

Yup, they're professionals

[tardy badger]

Got my second shot

[jovial path]

mine will be in november.

11th of november I think.

[delicate stream]

Waiting to hear if 3rd shot needed

[tardy badger]

I’d rather other countries get their first and second shots before I get a third

[jovial path]

2th of november.

[delicate stream]

Ideally, yeah... But if the doses are sitting here, I'm not gonna let them go to waste if folks here still don't want to get shots

[tardy badger]

Sure, I just think if they are sitting around we should send them where people actually want them

[delicate stream]

Yeah. Sadly I don't have a voice in that

It is kinda nuts that we have doses sitting in places where people are passing but can't get doses where people still desperately want them

[tardy badger]

Our governments won’t send those vaccines to countries where they would get administered almost immediately

And now they’re talking about boosters and other countries are begging for it.. we live in a messed up world

[delicate stream]

Yup...

Part of why I'm plotting to escape

[stoic mesa]

where?

[delicate stream]

Probs Venus? I'm gonna start my own civilization! With Blackjack and ||[REDACTED]||

[stoic mesa]

Venal civilization 🙂

[delicate stream]

lol

[jovial path]

Venus looks great.

[delicate stream]

It has a lot of potential

[stoic mesa]

gravitational

[delicate stream]

That's one of the main draws

Nowhere else nearby that you could build an Earth-like environment and keep Earth-like gravity

[stoic mesa]

Surface temperature: 475C
Air pressure: 90 times that of Earth
"has a thick, toxic atmosphere filled with carbon dioxide and it’s perpetually shrouded in thick, yellowish clouds of sulfuric acid"

[real falcon]

can always stripo atomsphere off venus and send it it to mars

[crystal ore]

That'll be "Earth-like" before too much longer, indeed! 😅

[real falcon]

get 2 decent-ish planets

[stoic mesa]

my main concern is: how are we going to solder PCB there?

[delicate stream]

All that CO2 can be converted into oxygen and carbon bricks :D

[tardy badger]

Ka-boom?

https://tenor.com/view/madagscar-penguins-kaboom-gif-9833865

[crystal ore]

No, you'd need energy to pull the carbon out, so it wouldn't kaboom.

[quartz wren]

My proto board array is together

Flyback mounted but not soldered.

[delicate stream]

.... I forgot to get more silver and black filament when I went to Micro Center, dangit

[quartz wren]

Case preview

the 4 holes on top are for an FPGA dev board I have 😄

and I seem to have misplaced a few switches and the nut for one of the rotary encoders

[late fulcrum]

If you end up short on flybacks, they're available as surplus

[quartz wren]

oh my

or I can do my other idea and make one from a magneto

XD

(actually was going to attempt that at one point not even kidding)

Actually built a prototype for it but never tested it

(don't have a signal generator and couldn't find any 555's)

Don't have a signal generator yet

This device will be part signal generator

[tardy badger]

Pure oxygen is combustible, highly.. so probably a kaboom

Though smokers on oxygen is kind of a interesting level of irony..

[wooden schooner]

🤦 👍

[quartz wren]

I should add amps and speakers for each analog channel on this thing...

That way you can audio-visualise the signals

Or maybe just one speaker and a mixer

[delicate stream]

Just gotta keep it below 25% and you're fine

[quartz wren]

Or fluorinate the surface of everything

[delicate stream]

Just gotta get some nitrogen

[quartz wren]

Too simple

[weary fiber]

how 'bout argon?

[delicate stream]

Traces

Should ideally be about 78% nitrogen

We know what works, stick with it

[tardy badger]

https://tenor.com/view/if-it-aint-broke-dont-fix-it-ronnie-lee-schitts-creek-leave-it-alone-its-fine-gif-20099041

[delicate stream]

But a bit of argon

[tardy badger]

How about this, we swap the atmosphere of the earth with Venus

Then move to Venus

[delicate stream]

But then everyone here will suffocate and/or be crushed

Possibly melt?

[quartz wren]

Meh?

[delicate stream]

There are a good number of humans I don't want to eliminate in this process o_o

[quartz wren]

Bring them with. Leave the rest.

I'm cool to be in either group

[delicate stream]

Not big on Thanos-ing the human race

[quartz wren]

Not really big on being part of it

[tardy badger]

“It’s not genocide if it’s random”
-Thanos

[quartz wren]

"it's not genocide it's semicide" -Thanos

[delicate stream]

Yeah, that's not how it works Captain Genocide...

[tardy badger]

Lol

[delicate stream]

I just had a wild crossover idea

[tardy badger]

Captain Genocide and Captain Marvel?

[delicate stream]

What if the Avatar from Avatar: The Last Airbender/The Legend of Korra were thrown into the Marvel universe, and took on the task of maintaining balance in the universe instead of just the world, including going up against Thanos?

[It doesn't matter which Avatar it is]

[tardy badger]

I read avatar and defaulted to blue humanoids

[delicate stream]

lmao, that's why I specified

[tardy badger]

Yeah

[delicate stream]

Giant blue kitty alien people is the default for most folks XD

Having them in the Avengers army might be interesting too?

[tardy badger]

Super strong and great fighters

They’d be probably equal to super soldiers

[delicate stream]

Yeah, they'd be useful, but I don't know if it would really be interesting

The ATLA/TLoK Avatar at least has interesting powers to explore against Marvel baddies

[tardy badger]

Firebenders would be equal to the human torch

Imagine if Ozi (spelling?) said “flame on!” Every time Hw fire bended lol

[delicate stream]

Yee. I have a feeling that benders as a whole might be seen in the vein of sorcerers like Doctor Strange

[tardy badger]

Well, I’d have to agree there

Being a good bender was about being in touch with who you were, at least this was particularly true of the avatar

[delicate stream]

Haha, Ozai is a bit too serious to have a catchphrase... Zuko, on the other hand...

[tardy badger]

The only person to have the “balance” to maintain all the tugging of all the elements

There were in a way like the infinity stones.

[delicate stream]

Yeah, the Avatar probably has about as much overall power as the set of Infinity Stones... Seemingly the ability to manipulate all of reality

Other benders do need to be balanced in themselves to effectively bend though

Actually the effects of emotional trauma/instability is seen in TLoK

Man, the Avatar going against Thanos could be amazing

Especially if it was like a 2 movie thing like Infinity War and Endgame -- Avatar comes in, things are dire but seem like they'll be fine, then things go bad, first movie is a painful ending, but then fix things the next movie [although maybe without time travel?]

[not that the Endgame time travel was bad, just not Avatar style]

[tardy badger]

Yeah, use bending to create new infinity stones to defeat Thanos

But it’s a metaphysical journey to discover the origins and balance of the universe

[delicate stream]

Although I guess if we really want it to be Avatar vs. Thanos and not all the Avengers + Avatar vs. Thanos, then we'd probably want to have Thanos thrown into the Avatar world and find Infinity Stones there

[tardy badger]

Then a big battle as Thanos realizes that Aang created new infinity stones

[delicate stream]

Ohhh yeah, that'd be cool, going back to before all the backstory we know of the Avatar world...

But would we want it to be Thanos vs. Aang, or Thanos vs. Korra?

[quartz wren]

officially Thanos vs. Korra and Aang just ends up stumbling into some solution that saves the day 😉

and Sokka attempting to help with his boomerang but only managing to hit himself in the head

[delicate stream]

lol

Walk time... ttl peeps

[hasty quarry]

I got in a philosophical discussion with my precalculus teacher today

[terse lion]

hello yall

[hasty quarry]

He argues that the answer to the limit of a function such as the square root of x, where x does not approach negative infinity, is no answer

He's literally letting us leave it blank if it comes up in a test

But I argue the answer is undefined. Because if you're going toward a zone of the domain in which nothing is defined, then you're approach a lack of definition as well. I don't know what to really piece together here

He disagrees with me, but I don't want to let it go that easily

[terse lion]

huh

imaginary numbers?

[hasty quarry]

I mean yeah, you're getting imaginary numbers when you go left of 0 in sqrt(x)

But you're not approaching something real then

[terse lion]

exactly

[hasty quarry]

You're not approaching anything

You're approaching positive infinity from the right, but he argues there is no answer for the left

The conditional is illogical, so there can't be a conclusion, he says

[terse lion]

the left would possibly go to negative Inf, which could lead into the realm of imaginary numbers since yall are talking about square roots

[quartz wren]

don't you normally use an arrow to say what it's defined as from each direction?

then one has an answer, the other is undefined

and if it's the same, it is the limit definition for that point in that function

[hasty quarry]

But it's not a point specifically, it was the limit as x approaches infinity

[quartz wren]

right and you can't come to infinity from positive

[hasty quarry]

Sorry, "from" wasn't the right word

As x approaches positive infinity, the function is positively infinite. But what about when it approaches negative infinity?

Again, he argues there is literally no logical answer

Because well...x doesn't approach negative infinity in the first place

He said it's a philosophy issue. The question isn't logical, so there can't be a logical answer

[terse lion]

but SHOULD it in the first place

[hasty quarry]

No, it shouldn't

[terse lion]

oh lol

[wooden schooner]

Or you could give a precise mathematical definition to limits...

[hasty quarry]

It's the sqrt(x), it literally goes nowhere near negative infinity

[hasty quarry]

Delta epsilon?

[wooden schooner]

That's one way

[hasty quarry]

Do you think he is right though?

[wooden schooner]

I think the statements you are relaying from your argument, as far as I can tell, are essentially over what the right definition for limits and square roots are, but you're both coming at the issue obliquely

By arguing about what statements that use that vocabulary should or should not be true, rather than directly addressing the issue that you don't have an agreed-upon precise definition of the terms

[hasty quarry]

Hmmm

Then let me ask, what is the answer for lim x -> neg inf sqrt(x)

[wooden schooner]

One sec

[crystal ore]

Technically it's undefined, though informally you could call it i * inf or something like that. That's not really a limit, though.

Not every expression has a well-defined limit.

[hasty quarry]

Well, we can't say the limit straight up doesn't exist, or can we?

In this case

[wooden schooner]

oh, I thought you said positive infinity

[hasty quarry]

I edited it, I'm sorry

[wooden schooner]

to illustrate the point, let me answer what I would have answered to "what is lim_{x -> infty} sqrt(x)"

[hasty quarry]

Wait you thought I said positive infinity this whole conversation?

Ahh

[wooden schooner]

if "limits at infinity" are defined as screenshotted here, then there is no limit.

[hasty quarry]

I mean that does approach positive infinity doesn't it

Oh god this is terrifying

[wooden schooner]

if we instead use the "extended" definition that allows the limit to be either a real number or one of the symbols infty or -infty, as screenshotted below, then the lim_{x to infty} sqrt(x) = infty

[hasty quarry]

What about to negative

[wooden schooner]

they are initially-scary definitions that take a lot of digesting to make sense of, but if you agree on that definition, there is absolutely no ambiguity as to what the answer is

for negative, you need a definition of sqrt

if you agree that sqrt defined only for nonnegative numbers, and is undefined for negative numbers, then you can just go to the above definitions and see that neither of them is met

in general, if you're writing mathematical exposition and talking about a function f that is defined over nonnegative numbers only, it would be weird and kind of confusing to say "lim_{x to -infty} f(x) is undefined." The reader would probably think, "why are you even talking about that?"

if on the other hand you want to have a philosophical discussion about whether the symbol "sqrt" should refer to a function from nonnegative reals to reals, or should instead refer to a function from reals to complex, that is another possible discussion

but I'd say there is no inherent reason that that discussion has anything to do with limits

as you can probably tell, I kind of have a pet peeve when teachers argue about definitions (i.e., by fiat) and act as if it's a logical argument 😛

[hasty quarry]

I come back to this thesis

You people are funny

It's wonderful

[late fulcrum]

"A negative number raised to an irrational power is Complex! That is, Pluto reappears, but with a complex mass. The real part of this complex number is negative. While this idea may be repellant to some, Pluto will be repellant to everything at this point." – A. J. Dessler and C. T. Russell, "From the Ridiculous to the Sublime: The Pending Disappearance of Pluto"

[wooden schooner]

Dat branch cut tho

[stoic mesa]

I always knew that duct tape and WD40 solve 90% of mechanical problems.
https://twitter.com/1stMAW_Marines/status/1432493031693844481?s=20

1st MAW Marines (@1stMAW_Marines)

Caption this!

Lance Cpl. Bobby Smith III, left, and Lance Cpl. Luke Stell, both assigned to the "Green Knights" of Marine Fighter Attack Squadron VMFA-121, apply duct tape to an F-35B Lightning II…

Twitter · Aug 30, 2021, 11:58 PM

[jovial path]

...

I think someone hacked my twitter and unfollowed a lot of British Royal Family accounts that I used to follow.

Pretty weird.

[real falcon]

weird

[jovial path]

There is weird people for everything on earth.

But I really do not think it is this for sure. At all. Maybe I did this in the past without noticing or something like this besides I can follow again.

[real falcon]

make sure to secure your account

[jovial path]

I use premium Antivirus. A very cheap one, but I use it.

https://tenor.com/view/high-five-heck-yeah-oh-yeah-whats-up-toca-aqui-gif-21966282

[quartz wren]

@late fulcrum hey crt question. If I have a vector display mode would it be feasible to do spiral triangle fills for 3D games?

That way it's a continuous loop that doesn't self-intersect on a given triangle

And just turn the beam off while over parts where another triangle occludes it (using software control, which could also overlap triangles for transparency)

(and do a beam intensity ratio for the overlap between the two depending on opacity value)

Could even possibly be done using a color CRT but I didn't pick up the one I saw on the side of the road because no space for it yet...

(it was a chonker and would be well suited to this if it works)

But rather than filling triangles in RAM with virtual rasterisation only to then rasterise that directly on the screen seems a waste... Makes sense for video but not for games.

Might as well save RAM, draw the triangles directly to the screen, and be smarter about the drawing pattern

You could even get this to work with an LCD panel with a bit of black magic circuitry that uses ADCs to control the x and y matrix inputs with a slow discharge on the panel and an input for intensity

Heck might be able to make an actual tracing oscilloscope with an LCD using this...

I have just such a panel to experiment with. It has all the wires conveniently separate rather than in a ribbon cable and I found a datasheet for it

Though I may need to go deeper than the wires and datasheet allow lol

So it might be good to start with a monochrome matrix addressed 3D printer display

And because if you use the style of ADC that uses a counter with a DAC and a comparator it takes some time to settle on a value, it will also have beam swing delay built in

So you would effectively have a virtual CRT that can be mounted in a smaller space. If you array the pixels it uses like phosphor dots it would even look accurate

Ish

Idk don't have LCD panel fabrication capability in home so I can't test that

But I can modify some

Since I have a bunch in scrap that don't have homes yet

[vagrant sonnet]

I hear why this webcam was marked down to $3

[jovial path]

I had a dream today that Lary Page(fouder of Google) wanted to be the son of my father. It was pretty annoying, he was like talking too much with my father and was too much close to him. I tried to get him out of my house.

Pretty annoying dream.

[late fulcrum]

Yes, there are several ways to do that, in analogue, digital, and hybrid approaches.

[tardy badger]

Starbucks at home

Homemade caramel and homemade vanilla syrup to make a caramel macchiato

[wooden schooner]

Estimated ratio (home production cost) / (sbux price)?

[tardy badger]

Idk.. maybe $2/cup?

Better taste control too

Plus the satisfaction of making it yourself

[wooden schooner]

Where does most of the cost come from?

I have a $60 espresso machine which I use only to steam milk, and buy good black tea by the bag. Usually my drink of choice is some variant of tea au lait, which I can make for 40 cents and costs $4.75 at Starbucks

Paid for itself in under 2 weeks

Sadly, when Starbucks bought Teavana, they stopped selling Teavana earl grey at retail stores, and while I have found good earl greys, I haven't found one that has the particular feel of that one

[stoic mesa]

I first thought you are calibrating a 3d printer....

[polar bloom]

lol

[tardy badger]

Lol

[tardy badger]

Probably the coffee grounds. I use a French press so I end up using more than I want to

[tardy badger]

Today is not the day I tell you what

If anything else bad wants to happen today, it’ll have to wait until tomorrow

[jovial path]

Good morning

[stray wind]

Ok, this sounds amazing. I'm a bit jelly here.

My folks a few years ago bought me a really nice espresso machine and an equally nice grinder (which it turns out is absolutely necessary.... had a crappy one to use for coffee before that and tried to use it with this machine and it was faaaiiilll) for xmas and my birthday. I'm not sure I ever would have sprung for this machine myself, but now that I have it, I can't imagine not having it.

[tardy badger]

i hope to one day have a great grinder and espresso machine

maybe a nespresso

[stray wind]

Mine is a Rancilio Silvia, and a Rancilio Rocky.

Other than dialing in the grind for new beans, it's basically a perfect pull every time. Not a lot of fiddling. Also it's apparently super hackable, though I haven't crossed that line yet.

[tardy badger]

lol, i just like good coffee. the french press is great but the sediment leaves much to be desired

[wooden schooner]

What would you hack your espresso machine to do?

[shadow siren]

Express it's self

[stray wind]

Better control temperatures, or pressure, to really dial in your espresso experience. There's other stuff folks do as well, but those are the major things.

I like how it works already, but maybe I'm missing out. 😄

[wooden schooner]

Oh, so basically improve the machine 😆

Rather than uh... idk, unlock some secret function or hook it up to your alarm clock

Not like that brouhaha over the McDonald's soft serve machines which had sekrit codes that only the repair people knew

[tardy badger]

and add bluetooth to add a Siri shortcut to send the brew command upon turning the alarm off

[stray wind]

Hah! No, not to unlock sekrets. Though you could probably hook it up to your alarm clock, though I feel like opening up the machine to do that is superfluous - it would make more sense to put something between it and power.

[jovial path]

@night crescent Will Adafruit produce big electrical components in the future?

Like supercomputers and related.

[stray wind]

Please don't tag adafruit with arbitrary questions. If you really need an answer to a question, please email [e-mail]. Otherwise, simply ask the question here and someone might answer.

[jovial path]

Ok. I did not know. Sorry miss.

[ancient rivet]

@jovial path yep. also, please read through #welcome and #code-of-conduct

[jovial path]

I can re-read in the near future.

[quartz wren]

wonderful

okay today I think I'm going to reverse engineer the original control PCB

which means a lot of desoldering and writing

because I want to rebuild parts of it from the original circuitry

since clearly it has circuitry capable of generating the HV I need

[quartz wren]

@late fulcrum this is one of the jars I plan to make into a crt when I get a molecular diffusion pump

Also very ambitious but I want to make one out of this too

Thinking something along these lines but... You know...glass...

(as far as the back end piece which just has a plastic and silicone piece as standins)

And I found a friend who wants to learn how to do glass making anyway but hasn't had the opportunity to learn... So I'll let him practice in my lab with lab equipment as payment for the space and training tools / materials

Since I want to learn but I can get twitchy sometimes so uh... Delicate stuff can be hard...

So I should be able to get a hand made molecular diffusion pump effectively for the price of being a friend and collecting all the glass I can find

And he said he'd be willing to help me start a bespoke CRT manufacturing company

[delicate stream]

Lmao, I didn't even test audio... Didn't occur to me. But that would explain it!

[quartz wren]

So if anyone has projects that need a tube made to spec... Eventually I'll be able to do it...

Probably some time next year

(maybe the next)

Working toward something along the same lines but far more complex of a system (an ion ray tube with selections between several different atom types to build up chips atom by atom but that's way down the line) so I will need to get really good at designing particle accelerators so CRTs should be simple after a bit of practice towards the end goal

And yes, I will make a phosphor plate attachment with a camera sensor for running system calibrations

Might even just make it so that there is a slide out drawer on the side using a metal gasket on a hinged panel for swapping the product target plate out and just have the end of the tube have a phosphor screen built in below the target plate slot for running calibrations and then putting a plate in without the calibration system being removable and therefore error prone

Point is eventually I want bespoke chip manufacturing to be a process available to everyone for cheap.

With just the purchase of a system that's similar to the kind of monitor I grew up staring at

Hopefully smaller than that for a one-off chip printer

In fact if my initial assessments about space requirements and my ability to even pull this off are close to reality, it will be smaller than most desktop 3D printers

(in its final form)

The hardest part is pulling off a high vacuum with that small of an apparatus but I think I can manage safely with a gallium sprengel pump

Just will be slow to draw the vacuum

Then use an active getter (a sacrificial positively charged plate) and send a bunch of electrons through to ionise any gallium that made it into the system and pull it out before it gets into areas it could damage

Point is I'm still in early design phases and when I figure it out, CRTs will be a cinch

Not only that when I have a working prototype I can miniaturize I will be able to really show off what its capabilities are (and test the limits a bit)

And one of the simpler things it should be capable of is a solar powered chip-sized drone.

With all of the processing, power generation/storage, sensors, actuators, the works printed in place

Yes I know this tech is a long shot but I think it is feasible and even doable with apocalypse tech.

So I'm pursuing it as a life goal to make it not just feasible and doable but available to all who want it.

This project started when I asked myself "if I were in the woods, making things only from my environment, what would be the fastest way to get MEMS tech?"

As that was the actual plan, but if I did that I couldn't share it with everyone as easily

Plus I've since come to the conclusion that I may legitimately need a care taker so I probably won't be able to do the "go it alone" thing anyway

Anyway sorry for taking over off topic with pipe dreams again...

It's a thing I'm working on not doing...

[jovial path]

I bought new glasses today 🙂

I'm very happy.

they are very standard, I searched for the more standard glasses possible there, they will arrive until 20/09 , but they will probabily arrive earlier than this date.

[jovial path]

I am nearly obligated to be stilysh, very hard to find something like a perfect square or something like this nowadays... I think in 1910 it was easier to find it.

[dapper hatch]

@jovial path Know what you mean. To me the frame is just to hold the glass. Why it need to be any more? 🙂

[quartz wren]

I should get some glasses again... It's been a while since I lost mine on the other side of the country so eye strain when looking further than about 6 meters is real...

[dapper hatch]

You only need glasses when your arms are no longer long enough to move the part away to see it. 😄

[quartz wren]

Actually I have to move it closer haha