(imported but inexpensive - possibly 'genuine')
#general-chat
dusty citrus
slim ledge
extended family in boston has a great old antique grandfather with the slowly-falling counterweights... always been fascinated with different clock mechanisms. cuckoos too!
dusty citrus
Yeah I would really like to have an overscale cheap one with good parts that you could take apart and examine. Like a kit meant for that.
Maybe $250ish cost range for decent (possibly brass) parts and designed to take apart and put back together again.
burnt tendon
I dono, the last time someone offered to clean my clock, it didn't go so well
slim ledge
yeah that would be neat... i'm sure there's one out there somewhere
I'd love to see this thing someday: https://www.atlasobscura.com/places/the-giant-ghibli-clock-tokyo-japan
dusty citrus
wow
(This being New England USA) we still have quite a few tower clocks.
They tend to go in and out of repair and stand for years, not working, then they get a repair.
I live near Waterbury and Bristol and I think both have a place in 'clock history' in the States.
(Connecticut)
Timex was very close by, I'm told. They moved out and I don't know where to.
Timex Group USA, Inc. (formerly known as Timex Corporation) is an American global watch manufacturing company founded in 1854 as the Waterbury Clock Company in Waterbury, Connecticut.
wikipedia ;)
I had absolutely no idea they had a local history until I was in my 40's.
But there was always a sign in Bristol (not far from Waterbury) about a clock museum or something. Was at the base of a very steep hill.
burnt tendon
For you, that really puts the Connect in Connecticut.
dusty citrus
I think it's an 'indian'word - Connecticut (anglicized).
The word "Connecticut" is derived from various anglicized spellings of โQuononoquett (Conanicut),โ a Mohegan-Pequot word for "long tidal river". - wikipedia
We did a sailboat 'mast stepping' op on the far side of a RR bridge underpass - the boat just barely cleared the underside of that bridge, down at the shore.
Had to wait for the tide to come up all the way (marked by a submerged post of a dock on the upstream part of that river).
The marina was on the wrong side of the tracks. ;)
Once the mast was stepped we sailed into Long Island Sound, traveled in the Sound (bay) for 15 miles, put down anchor and slept overnight, on the way to destination (a 'free' Federal mooring).
(In/near Mystic - the marina was way further west than Mystic).
The guy who owned the boat said that in exchange for Army Corps of Engineers' work on dredging the harbour, the deal was there was a small allotment reserved for Federal moorings.
You had to put down a mooring in the spring and remove it in the Autumn, iirc.
We got to the boat by canoe, since the mooring was out in the water a ways. ;)
(Most of the people who could afford a regular mooring had some kind of dinghy for that; we toted the canoe on top of the car, each trip down there ;)
stoic mesa
@dusty citrus there are some inexpensive clock kits like this: https://www.scientificsonline.com/product/deluxe-wood-vera-clock-kit
of course, it is far cry from real old-time grandfather's clock...
dusty citrus
@stoic mesa Timely advice! (for @burnt tendon )
Thanks!
zealous ermine
just picked up an atari 2600 for repairs!
limber jackal
Just saw this. Clever analogy for the explanation
https://twitter.com/shanselman/status/1369139327763054594
crisp oracle
People in tornado zone, y'all ok???
umbral phoenix
Just curious, are there any particular techniques or tools you use when trying to figure out how some code works, especially when it's layered (e.g., multiple APIs at different levels), spans a number of files, and has some complexity to the processing (e.g., efficient but abstruse or arcane code)?
polar bloom
Chop it up into smaller parts, run the smaller parts separately.
umbral phoenix
That could require writing a lot of stubs.
I feel like sometimes I should get a huge whiteboard or very large piece of paper, and map it all out manually.
I'm not a software developer, so this stuff isn't always immediately intuitive ๐
polar bloom
I do this all the time (digging into other people's codebases). It definitely helps if you can isolate individual components and just work with them.
dusty citrus
@umbral phoenix tannewt put me onto 'ag' the silver searcher for that.
https://github.com/ggreer/the_silver_searcher
I think Debian has an official .deb for it now.
cat -n <filename> helps at the command line. Prints line numbers. Can be used in a pipeline.
umbral phoenix
search is not really the issue... it's more like grok-ing the big picture of the code simultaneously with its intricate workings... a strategy for that, tools, techniques
dusty citrus
$ ag my_search_term | cat -n | wc -l tells me how big a hit the search term is, without flooding the terminal with output.
@umbral phoenix Code familiarity is helpful for that .. you get to the point where you recognize larger and larger blocks of information.
Knowing what will be found in an include file (.h) and what will not.
I use gitk a lot to tour the code.
umbral phoenix
for today, I just got out a big piece of paper, read through the code, and color-coded columns for each layer, what functions they had, and what they called, key variables, etc... it's easier if I see it all visually, simultaneously
umbral phoenix
it is a lot of work, and not very editable (not worth doing it digitally), but it's kind of a one-time thing to "get" it for the first time
dusty citrus
I have forced a strong cpp image of the code (Arduino IDE mostly).
To see how it all resolved.
For some kinds of work the objdump tool helps.
umbral phoenix
mine was python, so a little easier I think
dusty citrus
Python's a whole different thing as it is interpreted.
Not really sure how mpycross works - produces bytecode I guess.
I don't know what it is but I sometimes think it's a bit like assembler for a virtual machine. ;)
circuitpython/mpy-cross
umbral phoenix
right, I don't mess with mpy, this is all open source ๐
dusty citrus
I don't see those as orthogonal.
umbral phoenix
well, just haven't had the need to peer into mpy files since py files are easily accessible
dusty citrus
Right - .py is in ascii source which is usually your first stop.
But possibly the mpy-cross thing would illuminate subtle stuff.
umbral phoenix
path of least resistance to my goals
dusty citrus
There's lots of code that rarely is investigated by an individual because .. hm ..
'it just works' and 'it doesn't seem to be relevant to the immediate problem at hand'
Something like that.
umbral phoenix
there's only so much time in the day ๐
dusty citrus
Bare metal programming can shed some light on why 'other stuff' is there in more sophisticated development systems.
dusty citrus
there's only so much time in the day ๐
Lol yeah it's hard to figure some people's depth on these things.
Having a thorough operating system skillset has helped me a lot.
C is fairly readable and I'd guess so is Python.
I don't like large monolithic files - I like very small files that contain source code.
The OS-level tools help to see the larger picture.
(That's arguably why they are there)
Recursive grep seems good for finding related terms in multiple files.
Lets you answer a question faster, I think.
umbral phoenix
yeah, I love *grep
dusty citrus
Since I found ag I use it a lot; but old habits lead me to use *grep (usually egrep).
I use sed and wc -l to summarize or truncate more than I used to.
If I'm lost I may just redirect to a file and load it into the editor and look for stuff that way.
@umbral phoenix You could erase and reask the question here. ;) I don't think I was of much help.
umbral phoenix
it's fine, it's always good to hear about the tools other people use, and different perspectives
dusty citrus
Scott uses 'atom' I think it's called.
(can't remember)
I think this could be it:
Atom
A hackable text editor for the 21st Century
https://atom.io/
Which opens the door to mentioning emacs which I barely know (derivatives of).
There used to be a Mac vs PC thing wrt emacs or vi a while back. I went all vi ;)
(vim is my usual coding editor)
zealous ermine
dusty citrus
Never understood any appeal of 'video games'. Tried Ultima Underworld with a friend who was into it. Once you got over the fact a 'headless' man was attacking you, so what.
ESS European Space Station (?) was fun - orbital physics flight sim. Pluck out satellites and fix 'em (maybe).
You had to rotate axially to match the rotation of the satellite. Was good, back quiet.
Leisure Suit Larry was worth a few hours time as well, since it was a bit humorous.
Any flight sim was often worth trying, as well.
limber jackal
Scott uses 'atom' I think it's called.
He uses Sublime Text, but I personally find that at their base, Atom, Brackets and Sublime are all quite similar, visually and in terms of functionality. The implementations and ecosystems vary, but not to any large degree.
umbral phoenix
I use Atom for on-device CircuitPython code, and for GitHub-related editing. Sublime sometimes. BBEdit generally for code on the computer or remote host. I used vi before there was a vim, never went to emacs or vim.
But generally I avoid vi unless it's something super-quick and it would be more work to open the file in an editor, much prefer visual editors. I played around with VSCode, but it was quirky and had a strange overhead to it.
tardy badger
I use Vim
tardy badger
Itโs one of those things where sometimes itโs just easier than fussing with a more featured ide
stoic mesa
๐
tardy badger
Itโs basically all I use at work because a lot of times Iโll edit the repo and immediately need to build it to see if the changes work or not
stoic mesa
never used vim
used to use emacs many years ago...
tardy badger
Iโm not a fan of emacs ๐
Itโs the git edit default on the Unix servers I have to use sometimes and itโs a fight to save and exit my amended git message
stoic mesa
at least emacs has a psychotherapist built-in. Can be handy whne you really need help
limber jackal
Itโs the git edit default on the Unix servers I have to use sometimes and itโs a...
Try setting either the "$EDITOR" or the "$VISUAL" environment variables. Or both,though "$EDITOR" is usually the primary one checked
hasty quarry
I plan to play all of Debussy - Reverie
How's the intro sounding so far? (tiny mistakes in the transitions)
tardy badger
Try setting either the "$EDITOR" or the "$VISUAL" environment variables. Or both...
I rarely need to commit changes from Unix, I just use Unix for building certain tool chains
I use a red hat VM for most of my development and it has Vim defaulted ๐
limber jackal
A large number of programs accept vi keybindings.
For the record, notepad, Terminal.app and iTerm don't. No matter how often I try unintentionally!
tardy badger
Haha
polar bloom
They do accept Emacs style commands though (Ctrl-A etc)
dusty citrus
I use gedit for a quick wysiwyg/whatever flowing text editor but I like the rc shell (plan9/rio/p9port 9term) better.
I keep geany on tap but don't use it much anymore.
Used to use 'JOE' (Joe's Own Editor) as it had good search and replace.
I think moss-doss had QEDIT as its really good (scareware) text editor.
dusty citrus
dusty citrus
I've mounted several target boards on perfboard using extra long header pins wedged into the V-shape of misalignment of the holes.
I'm stacking them now, too. ;)
This module weighs in at about half a kilogram.
Black pill STM32, Feather RP2040, two CP2104's, 24 steel standoffs (pretty good sized) and that chromed low PCB holder adafruit sells as the base, and three perfboards sandwiched.
The low holder was what inspired me to go vertical on the perfboard stack, to get away from it with the extra long header pins sticking out well below the perfboard.
#help-with-projects message
for the pressfit technique (single stratum)
dusty citrus
Thanks in advance!
late fulcrum
That's annoying, the TIA is a custom chip. But at least it's easy to find, unlike the one in the Atari Video Music
tardy badger
Welp... I watched Seaspiracy
And let me just tell you, Iโve always kind of know the fishing industry was bad for the environment but holy wah
And then slavery used by Thai fishing companies... I never want to eat fish again
All these sustainability labels for fish are just one big joke and a huge scam..
Going to just figure out growing my own food year round at this point
velvet pelican
@jovial swift here is a time lapse of the small slide. Gonna put my metal on the awnings in the morning
20 minutes for them small ones to fully pop out
late fulcrum
I'm guessing it's a low power draw for those 20 minutes?
limber jackal
zealous ermine
dusty citrus
That boat ran aground.
real falcon
nis only half of channel is rated for that boat type
there was some stories about blackout but dunno
dusty citrus
It is a very long canal .. must have been quite a feat of engineering and expense to get it to where it was.
They said that section is a single canal, whereas the north section is dual.
(can you dig that)
real falcon
yeah. lot of work. it worked most times, but this shows maybe need to have better emergacy services or something
dusty citrus
Boats are probably built to the canal dimensions, not the other way around. ;)
real falcon
i didnt say otherwise? not sure what youre trying to say
dusty citrus
@real falcon You don't have to say anything to get me to be contrary. ;)
I might just assume an imagined position of an imagined speaker and rebut that. ;)
real falcon
ahh lol ok ๐
dusty citrus
;) seriously it's rarely important; I make assertions as I see 'em.
fergin intertnette
real falcon
lol
grave crest
Wishing there was an low-cost reseller of Goot heat sink clips ๐
About $1 over in Japan, around $7 here in the US.
limber jackal
Maybe the extra is to help dig out the Ever Green from the Suez?
late fulcrum
I used to buy Japanese stuff from Rakuten, but their website has become unfriendly.
velvet pelican
I'm guessing it's a low power draw for those 20 minutes?
I have no idea what the actual draw is.. its a 48 volt dc converter running them with the arduino
zealous ermine
somehow i interfaced a 74ls374 with a cd4040.... not HC, LS
the LS has an average output voltage of 3.1V (datasheet)
and the 4040 has a min input voltage of 3.5
yet they still work fine together??
late fulcrum
5V supply?
CMOS usually has its transition at half the supply voltage, so with a 5V supply, it should be at 2.5V, not 3.5V
zealous ermine
Ahh yeah that makes sense
I was just reading what the datasheet says
Well in the end, it works and my 4-bit computer is happy
:)
dapper hatch
Part of my studies for my Masters we have looked at the impact of open source on the requirements process. That got me a little worried. Then all these supply chain attacks started to happen. I thought back to projects I had worked on where we had blindly imported packages that were part of the framework were using, Angular. Made me shudder. Then I discovered this bit of history where Ken Thompson described this actual scenario, in 1984!
http://wiki.c2.com/?TheKenThompsonHack
I think this is one of the biggest issues facing software development today. And it's just a little scary.
Sleep well tonight. ๐ ๐
stone orbit
5V supply?
What you said about CMOS is a good rule of thumb for transition voltage, but I usually use 60% and 40% as the mid point can cause oscillations.
In fact, if a CMOS inverter is biased into its linear region with a feedback resistor from output to input it makes a high gain analog inverter, which is one step away from an oscillator.
late fulcrum
Agreed: you do want to avoid values near there: I was just pointing out that a 3.5V threshold by itself seemed wrong for CMOS with a 5V supply. If it had been given as a Vih level, along with a Vil level, it would make sense, although that is a pretty big deadband.
stone orbit
I never doubted you knew what I said. I was gilding the lily.
zealous ermine
makes sense!
update: i measured the output voltage of the 74 IC, its 3.8v
even better then what the datasheet stated
anyways if i was getting voltage level issues, i could always swap some of the LS for HC
late fulcrum
Yeah, most of the datasheet ratings are conservative, so the chips will meet them at supply voltage, temperature, and load extremes with manufacturing variation. In most cases, chips will do better.
In general, I don't have problems interfacing TTL and CMOS, they play pretty well together.
zealous ermine
i've been told that TTL and CMOS don't like to work with each other, but i've never had an issue with it
my CPU is 50% ttl 50% cmos
hasty quarry
Is "never/nor" grammatically correct?
Seems to be, but I just used it on a whim and thought "Hm, that sounded unfamiliar"
dusty citrus
@dapper hatch
https://dl.acm.org/doi/pdf/10.1145/358198.358210
Ken Thomspon
Reflections on Trusting Trust
Communications of the ACM August 1984
source:
https://dl.acm.org/doi/10.1145/358198.358210
umbral phoenix
dusty citrus
the problem is to write a source program that, when compiled and executed, will produce as output an exact copy of its source. If you have never done this, I urge you to try it on your own.
He never had taken nor will ever take such strong measures.
'never nor will ever' authenticates both the past and future action.
neither is also in there somewhere.
'nor' is similar to 'not or'
This one's awkward:
'He has never taken, and will never take, such strong measures.'
short bone
lol
stoic mesa
afraid they need to push another update now
limber jackal
afraid they need to push another update now
Why would they? This patch is evergreen! ๐
zealous ermine
time to work on a datasheet for my cpu..... lots of coffee will be consumed
orchid zephyr
*time to work on a datasheet for my cpu..... lots of coffee will be consumed*
You made a cpu holy crap
Like using a big fpga
How?
zealous ermine
You made a cpu holy crap
nope! no FPGA!
just a lot of TTL, CMOS, and a big pcb
if you have any more questions, feel free to @ me
zealous ermine
yep!
orchid zephyr
I didnโt even know this was possible
zealous ermine
oh yeah it is
sure it's not going to make any groundbreaking CPU, but at least it works
it's pretty slow btw
orchid zephyr
What does limc mean
zealous ermine
Oh that's just the name of the cpu, it's an inside joke with a few friends ๐
orchid zephyr
Ah
zealous ermine
i have a few videos of it running if you are interested
stoic mesa
Real men build their own computers with vacuum tubes!
using nothing but their bare hands and stone axes
seriously though, it is really impressive
zealous ermine
i think you mean relays ๐
zealous ermine
seriously though, it is really impressive
Thank you!
This is just the first machine in a series i'm planning on building
zealous ermine
oh wow
zealous ermine
I have this old Underwood Sunstrand adding machine from around the 1940s? could be earlier
it's big, heavy, and uses an ink ribbon and a paper tape for a printout
looks like this
limber jackal
And goes kerCHUNK
stoic mesa
you have it? I'd love to show something like this to kids
I wonder if one can still buy it
zealous ermine
you have it? I'd love to show something like this to kids
I wonder if one can st...
yeah you can still buy them! check ebay, they should have a a fair amount
I found mine on the side of the road around 6 years ago
stoic mesa
indeed, they are on ebay for about $80+shipping
zealous ermine
yea, they are heavy machines
tardy badger
real engineers just use FPGA ๐
limber jackal
yea, they are heavy machines
So you're saying that the eBay shipping prices on these might be more in line with actual shipping costs?
zealous ermine
๐ yeppp!
stoic mesa
@tardy badger but we know that inside these FPGA there are tiny humanoids that just switch a lot of gates real fast...
limber jackal
"I have this really nice sheet of paper, includes 2 feathers glued onto it. Only 0.29$ + 429.36$ shipping"
tardy badger
420.69 for shipping?
limber jackal
real engineers just use FPGA ๐
Real engineers over-engineer their math problems and solutions, and end up filing their taxes late
zealous ermine
๐คฃ
stoic mesa
filling taxes is a software problem
cursive mural
Does it work?
tardy badger
filing taxes is a lobbyist problem
zealous ermine
@cursive mural yes it does!
cursive mural
<@!812161897515450441> yes it does!
Thatโs really cool!
limber jackal
filing taxes is a lobbyist problem
To quote the poet James Hetfield: "Sad but true"
zealous ermine
thank you! I'm working on creating a datasheet for anyone interested in the inner workings of it
tardy badger
what's also funny is the whole "taxation without representation" part of the american revolution wasn't even really that big of a deal
limber jackal
what's also funny is the whole "taxation without representation" part of the ame...
What's not funny is that it's still happening today
tardy badger
yeah, i didn't ask for these taxes
limber jackal
Me either, and I'm still not represented
tardy badger
nor do i actually get a say in where they're spent. I want a refund
limber jackal
"Ehhh, refund? There's a fee for that. And a tax"
tardy badger
(still waiting 45 days later from my tax return being accepted)
zealous ermine
oh no...
tardy badger
yeah, no letters, no communication on what's happening
just "Your tax return is still being processed. A deposit date will be provided when it is available"
so i sit quitely
every morning i check the Where's my refund tool. patiently waiting
stoic mesa
got a message today on FB from a guy who saw a mention of my POV staff and was asking if I'd be interested to work with him to make it collapsible. I said "yes" - adding to the list of my projects - and then he said he might be busy, too, as he was commissioned to make some art installation for Burning Man.
I was really impressed
tardy badger
that is pretty cool
stoic mesa
funny, I am used to discussing math with people of all levels, so getting an email from a Fields medal winner doesn't really impress me, but in the world of electronics, I am a novice and look at some of the more accomplished people with reverence
tardy badger
same
Arturo182, UnexpectedMaker, Star Girl and a bunch of others
I really look up to them as inspiration of things that can be made and that if you put in the right work that things can work out
and definitely look up to the Adafruit folks
they get to do some really cool stuff every day
i couldn't imagine getting to do something you absolutely love every single day
zealous ermine
I really look up to them as inspiration of things that can be made and that if y...
couldn't of been more true
tardy badger
Anywhoodles, I must be off to bed. 5:30am comes far too fast
zealous ermine
๐
tardy badger
one step closer to making open source ASICs
jovial swift
20 minutes for them small ones to fully pop out
Nice pics! Amazing what a cheap Arduino and a ton of labor will do eh?
crystal ore
playing around with a logo for my website
I like the dot on the "i", that's a cute touch.
zealous ermine
thank you!
hasty quarry
Other day I went to a restaurant with my family
We had options for a medium or large bowl of food
My parents chose a medium, I chose a large
Come serving time
The only difference is the size of the bowl
They weren't even trying to hide it, I got the exact same amount of food as my parents did
I was very annoyed
dusty citrus
@hasty quarry If they did that 7 out of 10 times you visited there, you'd have a case.
My pizza guy burns the meatball grinder a good 15 percent of the time by keeping it on top of the oven too long, until the delivery person is ready for it.
I can also tell 'who's on' (who is the cook) that night, as the owner's the only one who does a really good job of it.
(But I've had burned ones on his nights on, so there you go ;)
velvet pelican
Nice pics! Amazing what a cheap Arduino and a ton of labor will do eh?
A ton of labor is right ๐
Long slide awning is just about done outside of the flashing against the wall
zealous ermine
stoic mesa
No, no!
This is the right picture for "Using modern framework": https://static.dw.com/image/57011275_303.jpg
(with the excavator representing me trying to modify the framework for my use case...)
Only half-joking
limber jackal
๐ Congratulations! I know a few people who have attended RIT, so you're in good company!
tardy badger
this has such a fun feel to it
zealous ermine
๐
orchid zephyr
what i wind up doing when using machine screws
the only time that i dont wind up overtightening anything is with pipes
grave crest
Congrats @zealous ermine --- Class of 2007 here, RIT. It's a good school, and you'll get out of it what you put into it ๐งฑ
late fulcrum
$10 for a scope? Why would I pay that much?
limber jackal
- Geiger counter not included
stoic mesa
@zealous ermine congratulations!!
zealous ermine
Thank you!!!!!!
stray wind
Congrats!! Are you excited?
zealous ermine
YES
stray wind
That's excellent. Well done!
elder compass
new toy arriving at my makerspace today
orchid zephyr
i made a very stupid power supply schematic
zealous ermine
lolll
orchid zephyr
your only voltage choices are (factor of 32)x1.5
if you want the batteries to drain at the same time at least
viral spruce
congrats and enjoy the "RIT orange" brick!
zealous ermine
๐ ๐ ๐
charred aspen
How do you make schematics
zealous ermine
There are lots of softwares out there that can be used to make schematics @charred aspen
I go with Autodesk Eagle
Kicad is a good free one
charred aspen
I'm trying Circuit Diagram
zealous ermine
Cool, never heard of that one before
charred aspen
It's just a website
zealous ermine
ah cool
charred aspen
Nice and simple and free
zealous ermine
very nice, i'll check it out
charred aspen
zealous ermine
๐
stoic mesa
There is also Fritzing that can be used for schematics and also for diagrams like this one:
https://4.bp.blogspot.com/-qN0wCxgGyt4/WaONTrMvE-I/AAAAAAAADHo/vU2IQQ2L6gQHMHUDZB15acoibrq69fLAACLcBGAs/s1600/Racing_Drone_Flight_Controller_Logging_bb.png
grave crest
@faint flame Please do not attempt to circumvent the automoderation filter. For the rules, please refer to #code-of-conduct.
#general-chat is for conversations that don't necessarily fit into or digresses from the other channels we have. Keep in mind we're still a technology-focused server.
tardy badger
Wow
faint flame
i was complying with u
tardy badger
Keep in mind moderators can see messages that are deleted by the moderation bots
zealous ermine
do you think this would work for driving a common anode display using an active low input on the transistor?
i'm trying to build a display for the CPU
and the 74154 is an active low output IC
robust olive
like my circuit guys
late fulcrum
@zealous ermine It's a slightly strange lashup, but I think it would work, that's basically shunting off the digits not being used.
zealous ermine
Alrighty, thank you!
sick adder
tardy badger
I might be the non-existent member ๐
grave crest
That's ok, just chmod and your existential crisis is solved ๐
tawny forge
Hello
honest jolt
Hey
zealous ermine
hia
hasty quarry
I don't get it. Why is it two days. I've been hitting the gym recently, and when I have a leg day it takes two days for it to kill me
Not one, but two
I thought I remembered it being much faster to come on, but no, it's been taking two days. Weird
I wake up and can't move
limber jackal
Because if it happened the next day, you might learn your lesson.
But since you felt "ok" the next day, then you felt like you could go out, do more, and REALLY pay the price on day 2!
hasty quarry
That's what happened
I felt fine
And walked 2 miles just because
And then I woke up wishing I was never born
fathom relic
sounds like you need to alternate days between legs and arms or something
velvet pelican
I thought I remembered it being much faster to come on, but no, it's been taking...
This is the transition from a boy to a man ๐
hasty quarry
I suppose so
velvet pelican
@hasty quarry at about that same age that started happening to me. Instead of being sore the next day it was the day after... now its like three days after which is way worse because then i have to think what did i do to make this happen
hasty quarry
Does lactic fermentation have a role in soreness and pain?
Iโve heard that, but Iโm not sure if itโs mythological
zealous ermine
Hmm i think it might
stoic mesa
@hasty quarry I dont' think fermentation is relevant, but indeed in part, muscle pain is caused by buildup of lactic acid
orchid zephyr
Kinda weird how a bunch of ouch chemical all lined up is used to 3D print
stone orbit
@hasty quarry I believe that the only aches caused by fermentation are cause by excessive alcohol after exercise.
But having run 59 full marathons, I can say that breaks during exercise will to allow the lactic acid to clear will help along with making sure that you are eating foods that generate glycogen and adding enough protein to rebuild the muscles that the exercise has broken down.
One of my favorite snacks while running distances is string cheese.
little wagon
i been trying to use the rasberrypi imager tool to put the offical os on my sd card... but it formats it in FAT32... which can only only hold single files of less than 4GB but the imgage is 8gb... this is crazy
haha how odd, i just read the previous messages , im currently going through a lot of pain with lactic acid via Gout..
_<
late fulcrum
I usually use BalenaEtcher to put Pi images on SD cards.
little wagon
hm ill check it out
orchid zephyr
What is this thing btw
crystal ore
That looks like a RFID or security tag. It's mostly a flat loop antenna.
limber jackal
Quick heads up <@&327289013561982976> (sorry for the ping)
Edit to add: Thanks โค๏ธ
sick adder
thanks @limber jackal, entirely appropriate on your part to mention us and no need to apologize.
limber jackal
thanks <@!361158808501747735>, entirely appropriate on your part to mention us a...
Sure thing. I know it's "part of the gig" and all, and that it was appropriate and needed here. Maybe I'm just a bit too Canadian?
sick adder
At least as long as you're a Canadian, you can't be too Canadian.
limber jackal
btw, is proper "etiquette" to delete the message after a situation has been handled?
sick adder
I dunno, you can if you like but then the conversation makes less and less sense.
limber jackal
Ok, will leave it. Thanks again Jeff
orchid zephyr
Protip: every adafruit sticker has a free mini adafruit sticker included for free
dusty citrus
velvet pelican
Sure thing. I know it's "part of the gig" and all, and that it was appropriate a...
sick adder
I suppose an automatapoeia would be a machine that produces the sound of its own name
zealous ermine
Hmmmm
limber jackal
I suppose an automatapoeia would be a machine that produces the sound of its own...
Or a Tesla with a speaker that either a) makes it sound like a gas engine car, or b) literally goes "Vroom vroom"
umbral phoenix
audio skeuomorphism
zealous ermine
Oops...
zealous ermine
Fixed!
polar bloom
What is a BCD, @zealous ermine ?
zealous ermine
Binary coded decimal @polar bloom
polar bloom
Ah. I didn't realize you were talking about that BCD. ๐
zealous ermine
Oh lol
I designed the cpu to be bcd because it was originally going to be a calculator
But i kept adding on to it until it became an entire cpu
polar bloom
Personally I wouldn't describe it as "BCD based" but that it "performs its arithmetic in BCD mode" or something like that.
zealous ermine
Sounds good! I'll do some changes to the datasheet
This is the first datasheet I've ever made so there are a lot of things to fix
polar bloom
I also spotted some grammar issues but I wasn't sure how much feedback you wanted ๐
zealous ermine
lol don't worry, i'll do some proof-reading today!
i wrote most of it very late at night so there are a lot of mistakes
dusty citrus
velvet pelican
Now thats my kind of direct shipping ๐
limber jackal
Now thats my kind of direct shipping ๐
Gonna go ahead and guess that you don't live somewhere near Nebraska or Kansas!
velvet pelican
West coast
hasty quarry
I'm kinda disturbed
I went to my eye doctor, and he says I'm very suspicious for onset keratoconus
Which would explain why I've been seeing double vision worsening and worsening
zealous ermine
oh.... that's really unfortunate to hear...
hasty quarry
@zealous ermine Yeah, I'm kinda scared. As it would turn out, it's closely associated with Ehlers-Danlos syndrome, which makes your body pretty much have excessive amounts of collagen, giving your joints way more freedom of movement and makes your skin and tissues stretchier
But that's correlated with keratoconus because my eyes also have more collagen...so they have less structure, which is not ideal for the cornea
hasty quarry
In the typical case, my doctor explained I can use a gas-permeable firm set of contact lenses
Which would guide the cornea's shape into a proper lens
zealous ermine
Thats interesting
hasty quarry
Another way is a surgery to basically stretch my eye membrane in the right direction to make it stop sagging into a cone shape
And in the extreme case
A full transplant of the cornea
zealous ermine
Eye surgery always freaks me out
hasty quarry
Yes
zealous ermine
Not sure why though
hasty quarry
It's an exposed organ, and incredibly sensitive
It's not at all comfortable to think about cutting into it
zealous ermine
Oh, that's not good
hasty quarry
I hope I don't end up having to see an ophthalmologist (structure of the eye's surface)
Though I don't doubt that coming
zealous ermine
Yeah, i hope your condition doesnt get worse too fast... eye problems are awful
Vision is probably the most utilized sense
hasty quarry
This sucks. Symptoms of keratoconus and ehlers-danlos match me perfectly
He said I'm very suspicious for it, but I'm almost positive I do have these two
He doesn't know I have ehlers-danlos either, I found out about it afterward
hasty quarry
Yeah, I hope to
hasty quarry
Though maybe I should see another doctor who can test me for ED to have some report of it to show him?
zealous ermine
Yeah a real diagnosis is much better then a self diagnosed
Not saying im doubting you
hasty quarry
Nah, I get it, I was just thinking the same
hasty quarry
Keratoconus is where your cornea loses structure
And takes on the shape of a sagged cone
Which is terrible for actual focusing of light
zealous ermine
Oh yeah that doesn't look good
hasty quarry
It causes a blurred, distorted vision
Which, let me tell you
They're for real
When I look at an object, I see a copy image of it slightly above
burnt tendon
Having your eye shaped funny sometimes has astigma.
zealous ermine
When I look at an object, I see a copy image of it slightly above
That sounds awful
Seeing double vision all the time
burnt tendon
But, yah, basically, my mom had her lenses hanging by a thread for her entire childhood and was just short of being actually blind and was therefore paranoid about my vision, so now even the idea of contact lenses sketches me out and I can't watch other people put contact lenses in.
hasty quarry
It's not that obvious. My mind has sort of...filtered it out
orchid zephyr
Like how my brain filters out the chromatic aberrations on my very strong but super low quality glasses oof
orchid zephyr
Itโs from a Boris Johnson Instagram story that got corrupted for a brief moment.
zealous ermine
๐คฃ thats great
tardy badger
๐ถ I once had a dream that I wouldnโt randomly get dropped from my remote connection to my work computer ๐ถ
azure sundial
Why do 0 ohm resistors have the actual ceramic looking bit on them? Why aren't they just bits of wire?
Sometimes I feel like a 0 ohm resistor.
tardy badger
Technically it isnโt 0ohm
orchid zephyr
Well yeah
orchid zephyr
Unless it was a superconductive wire
tardy badger
True, though Iโm fairly certain even then itโs only a few hundred nanoOhms
Still negligible
But hereโs the interesting thing to consider
0ohm resistors actually provide a level of EMI filtering that you donโt directly get from plain wire
Usually very high frequency noise
orchid zephyr
Use an inductor?
tardy badger
So while technically you could ignore 0ohm resistors in some applications to save maybe a penny or two every board, you actually provide a significant source of noise which can cause random bit swaps on data lines and clocking inconsistencies on MHz+ crystals
Eh, inductors would probably have a higher ESR than the 0ohm resistor
Though ferrite beads and ultra low value inductors provide valuable filtering on power rails
orchid zephyr
What is the difference in construction that makes it filter noise
For a 0 ohm resistor
tardy badger
I mean, yeah
The 0ohm jumper resistors I use are film resistors
So itโs the film in it combined with the parasitic capacitance of the data line that essentially creates a filter. Itโs more complex than that, but basically you are using the jumper to filter super high frequency noise
orchid zephyr
That does make sense, but a capacitor could only filter current spikes, inductors can filter voltage spikes
Also is that their intended use?
The only purpose I can find online are for pick and place machines to have a quick way to add jumpers
burnt tendon
...it seems like you really have a chip on your shoulder about this.
burnt tendon
Allow me to tap on my "master punster" role.
orchid zephyr
Might have accidentally got one on me when I walked through the farm that they grow 555s in
tardy badger
Just a microchip.. no one can see it
zealous ermine
Just a microchip.. no one can see it
late fulcrum
hasty quarry
I've temporarily joined the face profile picture club
late fulcrum
Kewl!
zealous ermine
oh nice!
zealous ermine
I've temporarily joined the face profile picture club
nice glasses, they look like mine
dapper hatch
Been spending the weekend parsing some of the files in /proc/ for a little pet project of mine. Wishing they had decided to use Json format. ๐ซ Maybe I should do a RFC on an alternative /proc/ folder where it's the same data but in json format. ๐
[secretly hoping someone will point out it's already been done] ๐
TBH does not need to be Json. Just that all files used the same format and one that has been well defined.
sick adder
good job picking the most relevant extract from the page!
limber jackal
[secretly hoping someone will point out it's already been done] ๐
I'm sure someone's got an sed, python or other form of script assembled to do so!
polar bloom
Amiga will never die!
slim shard
"This is zombie speaking."
limber jackal
Ever been on one (or worse, take over lead) of one of those projects, where every place you look, every leaf you turn over, the pit in your stomach grows ever deeper?
limber jackal
Can't tell if that's an optimistic, or a pessimistic statement!
tardy badger
What if itโs a passive threat? Lol
zealous ermine
all of the above
zealous ermine
so the print is sliiiiiightly peeling up on the back corner
probably because i had my window open because my room was too hot
it hasn't gotten worse so i think(?) i'm fine
terse eagle
Hey everyone ๐ Just wanted to pop in and see if anyone's into some EDM/Chill pop - I just released a single yesterday and would love for you to have a listen if you've go a quick minute ๐
https://open.spotify.com/track/7vCXZMpTrwXJCPfcNWFJeu?si=HVubAwQbR4ScZ7MBAF0hCw
viral spruce
so the print is sliiiiiightly peeling up on the back corner
did you put aquanet on the bed?
or any glue/adhesive?
zealous ermine
Nope
short pulsar
Some mainframe lore:
orchid zephyr
Does is all need to be printed together?
zealous ermine
yeah
tardy badger
Wow nice
zealous ermine
thank you!
i think it looks a lot better now
before it was just lying flat on my desk
tardy badger
Youโre next challenge should be rebuilding it with nand gates and then do it again with transistors LOL
zealous ermine
Oh i actually have a plat for some future builds!
my next one is going to be an 8-bit one build in somewhat of the same way as this one \
then a 2-bit one (because it'll be a fun weekend project)
then relays!
tardy badger
Well diodes donโt provide the transitive property that we need for logic level design
dusk oracle
๐
zealous ermine
Diodes + transistors!
zealous ermine
<@!280477088958382080> i love it
Thank you! it took me 4 years to get to this point!
late fulcrum
I would print the CPU stand as a pair of Y shaped pieces (one for each side), printed flat
zealous ermine
printer wasn't big enough for that, trust me i tried lol
late fulcrum
That's generally when I start eyeing plastic plumbing pipe and hardware
limber jackal
The stand looks a lot like a frame. Just throwing the idea out there, if a photo/art frame might work well (not sure the dimensions of your board), and then you can use the two triangular bases as stands?
zealous ermine
I was considering using wood for a frame, but the makerspace i go to is closed due to covid
So i decided to use what i had on hand, which was a spool of PLA and a lot of time to burn
limber jackal
Makes sense
dapper hatch
@zealous ermine Only here would someone casually say they were printing a CPU stand and as if it's a daily occurrence. ๐ Great work! Love it.
zealous ermine
<@!280477088958382080> Only here would someone casually say they were printing a...
Thank you!
tardy badger
The feeling when all the trees are blooming and so are your allergies
real falcon
weary fiber
Anyone here good with trig maths?
I've got a challenge I've been stuck on for a month :/
real falcon
i used to be good on that lol many moons ago
weary fiber
Here's the challenge
My solution for part 1:
part 2 is kicking my butt though :/
real falcon
lets see, second must be on x axis, and touching first circle
i might be wrong but isnt rad same on both spots to center
zealous ermine
i wrote a program for my TI-81
this is x64 speed cause that z80 can't crunch numbers nearly fast enough for real time
weary fiber
i might be wrong but isnt rad same on both spots to center
nope!
umbral phoenix
can you set up multiple equations, multiple unknowns? the three points on the smallest circle have constrained x and y values, either 0 or in terms of the other known circles.
but there's probably a trig way to do it
late fulcrum
Yeah, there's a trig way
stoic mesa
There is a nice formula in geometry called Descartes formula which tells you how to find radius of a circle tangent to three other circles or lines.
So once you get the radius of green circle, you can use it to find radius of purple one
In fact this could all be done by straightedge and compass, no trig functions required - but that would be a different problem
BTW, if you enjoy geometry challenges, check out app called Euclidea
drowsy zephyr
late fulcrum
Not bad, but you could eliminate some vias fairly easily.
orchid zephyr
makes pcbs on a torus to eliminate all vias
zealous ermine
the big brain play
velvet pelican
That's generally when I start eyeing plastic plumbing pipe and hardware
These days plumbing parts are outrageously expensive
dusk oracle
i'm not gona lie the idea of making 3d pcb's excites me
Another idea i like what if i could pick and place parts into a print and print conductive filament to connect it up.
late fulcrum
Now I'm tempted to make a mรถbius PCB to eliminate vias
dusk oracle
๐ค
orchid zephyr
You mold the substrate and hand make the rest of the pcb. Doesnโt seem very hard
burnt tendon
Making your own mรถbius PCBs would be a real flex.
short bone
Yeah it should not be hard with flex pcb
zealous ermine
it needs to be done
limber jackal
And after the mรถbius PCBs, Klein bottle PCBs!
https://www.kleinbottle.com/
orchid zephyr
yes
orchid zephyr
Yeah it should not be hard with flex pcb
the challenge that i'm finding while messing with the kapton is making it continuous with itself
im going to try to use some fiberglass cloth that i can weave into itself, then soak in epoxy to preserve the shape
stoic mesa
Here is a Mobius PCB for you:
https://twitter.com/GeekMomProjects/status/1340478662773067776?s=20
velvet gulch
Anyone know of a source that I can buy qty 200 of the LY68S3200SLT PSRAM for the ESP32 that has it in stock for immediate shipment? Tnx.
old relic
I am often amused by the captions that YouTube's algorithm comes up with...
real falcon
yeah
i often saw weird stuff on youtube before they improved stuff
still sometimes strange but not too bad
old relic
Hah! I was posting one of JP holding up a GPS module, captioned "GPS module in stomach," and Discord came back with "Woah there! The owner of adafruit has requested that Discord block any messages our mostly-accurate robots deem to be explicit, so your message has not been sent." (To be clear, GPS modules should not be in stomaches.)
I'm totally curious as to what the algorithm locked in on
real falcon
no idea
zealous ermine
๐คค
tardy badger
Closer to Turkish
zealous ermine
looks great!
burnt tendon
Lamb rack is my wife's favorite thing in the whole wide world.
tardy badger
I cut it down to chunks to cook it a little longer since the wife doesnโt like medium rare
Overall super tender
Flavors could have come through a little better but I wasnโt sure what to expect so notes for next time
burnt tendon
So, my usual trick is to sear it pretty hard in a skillet that's just about to start smoking, and then toss it in the oven at 295ยฐF
tardy badger
I did the โcool it at 450โ 15 minutes fat side up, 10 minutes fat side down
Did a garlic, rosemary, and olive oil kind of marinade
burnt tendon
Yah, obv there's a lot of personal preference but I tend to prefer to cook my lamb at a really low temperature.
tardy badger
I think Iโll rub it down with course sea salt and peppercorns next time. Let it sit cool for half a day like that and then put it in a marinade overnight
burnt tendon
Yeah.
I'm usually pretty pleased with a celery salt/pepper/papprika/ground-chili-peppers rub. You might marinate it and then put the sea salt and peppercorns on.
tardy badger
Yeah, definitely some fun ways to make it
Most recipes I see are doing the crown lamb ribs thing
burnt tendon
Yah, my wife is Hindu and she's got a little silver baby calf in her little prayer set so I don't bring beef into the house and she doesn't eat it, so I do a lot of lamb.
tardy badger
Lamb is good, Iโve mostly eaten it in middle eastern and Turkish food
burnt tendon
I've never actually done the crown lamb ribs thing. I probably should, just for completeness sake.
I haven't had enough Turkish food. Like, I worked in a group that had a number of turks in it, but all of the listed Turkish places nearby seem to be mostly pan-medeteranian/middle-eastern-plus-turkish places.
tardy badger
Yeah, that tends to be the case
My mom has a complete Turkish cookbook
Things like puff borek are super good
Like Mediterranean Cheetos is kind of what they taste like
Different kinds of kebabs and whatnot
limber jackal
Lamb looks delicious! But I must say, that cutting board.... ๐, with Spiderman cup a close 2nd! ๐
burnt tendon
Yeah! That's a great one. My brother made me a cutting board like that. Obsessive tinkering runs in the family.
limber jackal
Yeah! That's a great one. My brother made me a cutting board like that. Obses...
No matter how you slice it, visually, it is a cut above
burnt tendon
Like, in various obsessive researching quests, I found out about all kinds of very Turkish-specific things like the ice cream that's got mastic in it and even more interesting flavors of Turkish delight.
And I absolutely know where to find an Indian ice cream place that serves extremely Indian ice cream, I do not know of a Turkish ice cream parlour.
limber jackal
Mastic?
burnt tendon
Yah, it's a resin. Literally desert topping and floor wax in one.
limber jackal
That's what I thought (only familiar with the term in French). How... interesting. Treat the taste buds and polish off a meal in one
burnt tendon
I mean, you most certainly eat food-grade shellac at least some of the time unless you are a strict vegan, so it's not really that weird.
limber jackal
Produce wax, yeah
Particularly bad on cucumbers and apples, to where you can scrape them and see the wax come off.
burnt tendon
Yeah, not something to wax estatic about.
limber jackal
indeed!
tardy badger
Lamb looks delicious! But I must say, that cutting board.... ๐, with Spiderman ...
My dad made the cutting board ๐
cloud turret
First NFT art by me with a rookie mistake of loading a huge file so be patient! Took my regular internet connection about a minute to download. ๐ If you have a gigabit connection it's basically instant tho'. This link will load faster than the individual NFT of the Pomegranate MRI.
cloud turret
๐ Sold already!
orchid zephyr
Why did the adafruit logo go back to winter theme
stray wind
@orchid zephyr It looks right to me - I reloaded, and also quit and restarted. It's still showing the standard Adafruit logo.
orchid zephyr
Oh yeah I just reloaded it, itโs good now
spice moss
wooden satellite https://arstechnica.com/science/2021/04/finland-may-beat-japan-in-the-wooden-satellite-space-race/
limber jackal
@sonic bobcat - I meant ask yesterday after the CP weekly meeting, but... life happened. How are you liking your Keychron so far? And have you ordered Swedish caps, or living with the Norwegian ones?
spice moss
Nordic layout caps are similar
sonic bobcat
@limber jackal So far so good. it is a bit high though. And the keycaps are scandinavian.
The letters on the right is the swedish ones.
Interesting to note that norwegian and danish has the ร and ร reversed. ๐
covert spire
K1?
sonic bobcat
K4. I am too used to the numeric part.
limber jackal
Awesome, glad you're enjoying it so far - keycaps "issue" aside!
Still working my K8 here at home, and have my K2 waiting patiently at my desk at the office
And just saw they now have a wired-only series, and REALLY good prices
covert spire
limber jackal
Wow, you went the other way with a 125% keyboard, but with 50% of the keys! ๐
Those caps look really good compared to the original
covert spire
Thanks, lol
I like my typewriters, the keycaps some bigger like that, lol
I also case foamed the keyboard, so it's ultra quiet, lol
dapper hatch
@covert spire That is nice. Will you be doing the space bar too?
covert spire
Actually, I like the spacebar currently. I'm probably going to be replacing the esc key next. I mainly use this one for SBC's & testing switches for other keyboards
Current switches are Gateron Blacks. The other one still has reds, as I prefer to keep ones that allow more light through
covert spire
<@!300680062766678027> That is nice. Will you be doing the space bar too?
Thanks! ๐
grave crest
@limber jackal Those keyboards with really good prices --which ones are those? I've been looking to upgrade and doing some research, and who doesn't like an excellent value? ๐
limber jackal
I find that all Keychron keyboards are really well priced for the product you get: https://www.keychron.com/
The ones I was just mentioning that I didn't know they had, were the exclusively wired - which looks like is a different product "series"/code. That is, the product names start with "C" instead of "K".
They started as making mechanical bluetooth keyboards, which is quite niche, and then they went and did something crazy, and made them affordable!
grave crest
@limber jackal Woah, you're not kidding. Their C2 model is a mere $45....that's insanely affordable.
limber jackal
Right? I've seen dome keyboards that cost more. Of course, they were decent quality, but still!
And even their "base level" bluetooth boards - such as no LED/RGB or hot-swap switches, are really well priced
And the nicest bonus is that they make sure their layouts and keys work on Mac! No re-mapping!!!
grave crest
.....well, I'll have to poke around their site and maybe impulsively try one out. When a keyboard is cheaper than a sheet of plywood.....
dusty citrus
tardy badger
Ugh PayPal is messing with Tindie and itโs like.. a makers worst nightmare
Iโve got $40 in limbo
I couldnโt imagine a bigger maker having hundreds of dollars just sitting there unable to get it
limber jackal
And now they play "their fault, no, their fault" and the sellers are the ones suffering
burnt tendon
I deeply loathe PayPal.
tardy badger
Yeah same
I really try to encourage my shoppers to use my store and to pay the traditional route
My payments are processed through Square
umbral phoenix
even if PayPal is the processor for a given merchant, I'll do it as a standard credit card transaction rather than as a PayPal transaction
they email me every month now telling me my statement is ready, but I have not used them in years
tardy badger
Yeah, PayPal provides absolutely no recourse for sellers if something bad happens
I just hope that tindie is able to satisfy PayPalโs demands so I can get my money
$40 is a lot for a small company like mine ๐
burnt tendon
Well, Square Cash has been pulling a PayPal lately.
My perpetual frustration is that some people from my CS program, really smart folks, were some of the early PayPal founders, affiliated with the PayPal mafia. And they had grandiose ideas based off of Snowcrash for what it was going to be... and it didn't pan out.
Then cryptocurrencies come along and try to solve the wrong problem.
And now Square I'm starting to treat with some suspicion.
tardy badger
Them as a payment processor and not square cash is good
Technically Iโve had no issues with PayPal
But Iโm always wary
burnt tendon
Yeah, but the "hey, we're going to help yourself to your money" thing seems to be addictive for companies.
tardy badger
Yeah
burnt tendon
I used to ride the train with a buncha Square engineers, but some of them have left.
Also, I haven't riden the train in over a year.
tardy badger
I donโt know who to really trust anymore
I like Stripe too but I havenโt been able to use them with Weebly because Square bought Weebly
burnt tendon
Payment processors are number two on the stack-ranked list of why I have no side hustle.
But, yeah, I strictly avoid any "Pay with PayPal" buttons on all sites.
limber jackal
For a while, when Paypal and eBay were still one and the same, apparently a scheme that was going around was:
- Buy stuff on eBay
- Pay through Paypal (were there other choices?)
- Seller ships
- Buyer receives
- Buyer files a complaint about the product, such as "not as advertized", "sent the wrong thing", etc.
- eBayPal refunds buyer 100%
- eBayPal charges the seller 100% of the price, including their cut, and then dings the seller's reputation
People wound up with "free" stuff, and sellers lost out on a LOT of income and inventory
real falcon
paypal wasbasically forced on ebay lol but they later bought it out
hasty quarry
I've now learned that in the devonian period, long before trees, the world's surface was ruled by giant mushrooms of the genus prototaxites
Artist's representation
The genus name means "first yew", referring the the conifer family Taxiceae. Because the first scientist to classify it in 1843 judged its fossil to simply be an extremely old conifer trunk
They were 8 meters tall and 1 meter wide
I find this beautiful
real falcon
man wish have time viewer tech of some kind
real falcon
congats!
stray wind
@zealous ermine Congratulations!
zealous ermine
thank you! it's nothing too fancy (food prep) but it's a good way to get started!
real falcon
just be timely. leave earlier rather than rush to work everyday ๐
bring a book or something to read before work
zealous ermine
yeah, smart idea!
edgy apex
I'm gonna be a presenter for a local highschool hackathon at the end of the month. It's virtual so I had to make a video which I have little experience with but I managed to get done what I think is a decent intro to raspberry pi/raspberry pi projects. The first couple minutes is a video by raspberry pi that I found on youtube.
https://youtu.be/_wrIlRV29q4
hasty quarry
What if our bodies were 100% energy efficient
No electrical resistance in nerves and neurons
And our muscles, 100% energy into mechanical energy
No heating up when we exercised
What else would happen
vestal pier
we would get cold
tardy badger
We wouldnโt exist
Because we violated the laws of thermodynamics
Lol
โIn this house we follow the laws of thermodynamics!โ
- Homer Simpson
hasty quarry
So according to thermodynamics, a material which would not resist is impossible
Even in theory?
Even if it existed because โletโs just sayโ, it wouldnโt fit in laws?
zealous ermine
What if our bodies were 100% energy efficient
whenever a hypothetical situation of something being 100% efficient exists, it almost always ends in an explosion larger then you can imagine
hasty quarry
What the heck
late fulcrum
In a sense, our nerves have no resistance, but it's the same as transatlantic cables: the signal is regenerated periodically as it travels.
slim shard
when something is slightly more than 100% efficient you can end up with energetic situations for sure
late fulcrum
Flubber!
slim shard
biology is hard though, odds are various bits are designed to expect inefficient operations (thus, we aren't cold, and sweat when we have to), which would lead to general sadness were that knob significantly turned
umbral phoenix
so many Github notifications... either people have been very busy, or I had my head buried doing taxes for longer than I thought
jovial swift
only two things in life are certain...
dusty citrus
Does anyone know the total height of a raspberry Pi 3/4 with a 2.4 piTFT hat
jovial swift
Please don't cross post
green copper
Does anybody know if you can use a teensy microcontroler with a sd as a flash drive๏ฟผ
burnt tendon
I've now learned that in the devonian period, long before trees, the world's sur...
What you learned is that during the devonian period there was mushroom on the surface for things to grow.
topaz juniper
Just got my lil' hands on an ItsyBitsy RP2040! So excited!
wild temple
Does anybody know if you can use a teensy microcontroler with a sd as a flash dr...
im pretty sure the teensy can access the sdcard, but the "as a flashdrive" bit sounds strange...
green copper
It sounds a bit strange but I was thinking of trying to developer a dynamic file application where you can drag a file to the teensy and the teensy will read and manipulate the file and save it back to the drive
wild temple
you probably can do something similar with a serial connection
with your own bootloader
pearl vigil
It sounds a bit strange but I was thinking of trying to developer a dynamic file...
Do you mean like UF2 but compiled binaries are stored on an sdcard with execution of the files later from the teensy?
real falcon
wow! https://www.sciencemag.org/news/2021/04/glass-molded-plastic-could-usher-new-era-complex-shapes
proven olive
wow! https://www.sciencemag.org/news/2021/04/glass-molded-plastic-could-usher-ne...
I find it amusing that their example is a gear. While yes, it does show the potential for the shapes.... glass is one of the last materials I'd want for a gear
real falcon
probably though it could be used in loq torque applications in highly corrosive space though
real falcon
and chemical reactors
proven olive
Yep!
They mention a bottleneck but... I honestly don't think it's much of a bottleneck in certain situations. Washing the PEG taking days is annoying if you want a new part now, but if you're producing the same thing day after day, well. Sure, this one going in takes a few days. But the one you put in a few days ago is coming out right now!
It's a really neat concept!
real falcon
i was thinking very long belt of constantly moving belt
i used to work in pastry company, they have belt that loops inside giant freezer for days
or 24 hours but easy enough to double for 2 days, and double again for 4
dusty citrus
01234567 !
limber jackal
Nice!
covert spire
@limber jackal @grave crest I just poked around kickstarter a bit, & per their K12 posting, Keychron is entering 2 more switches in as options. Also non-backlit. Which may be for $$$ & battery effeciency.
limber jackal
<@!361158808501747735> <@!217791511708958722> I just poked around kickstarter a ...
The world needs more switch types! lol
covert spire
Alao looks like they're now getting their Optical brand cheaper than Gateron. So, for $49 for cheapest option, to $89, which is more spread that I like to see. showing massive list of options
grave crest
I'll have to pass on the K12 -- I'm a big fan of the arrow keys (num pad, not as essential). I appreciate that they have options though, that's pretty rad.
dusk oracle
@zealous ermine awesome to the max
zealous ermine
i found a strange bug / quirk in my CPU
some programs will refuse to start at 1mhz, but starting them at a slower speed then switching to 1mhz works
also some programs will just downright not run at 1mhz
i currently don't have a logic analyzer so i have no idea what is going on
tardy badger
That is rather interesting
zealous ermine
yeah it's really odd
and also, the program counter is different when it crashes at different speeds
which is even weirder
burnt tendon
Well, whatever the cause, I guess it'll hertz to find out.
limber jackal
Well, whatever the cause, I guess it'll hertz to find out.
Not as bad as reading that message was!
velvet pelican
Are you saying his message hertz
zealous ermine
๐ the puns never stop
weary fiber
hrmm.. I need to implement this with NANDs, and I only have 3 of them
ABC Z
100: 0
010: 1
011: 0
weary fiber
nvm, figured it out
zealous ermine
what for?
weary fiber
final project for this beginner circuits class, assignment is just "make something useful with this limited set of components"
zealous ermine
ohh, cool!
zealous ermine
ooh, like a thermometer of sorts?
weary fiber
Yeah, and two potentiometers are allowed, so I'll use em to make the reading adjustable
weary fiber
ensuring only 1 LED is on, using only 4 NANDs, was a challenge lol
zealous ermine
yeah, did you use K-mapping?
weary fiber
That comes in the next semester, so I actually haven't learned karnaugh stuff yet
it seems super useful though!
zealous ermine
oh yeah it is
it saved me so many times
its somewhat difficult at first tho
@weary fiber are you going to be learning about state machines?
weary fiber
Yup!
I'm a freshman Computer Engineering major, hoping to get an MS & emphasize in digital design, but I also know it's wayyyy too early to start planning that stuff lol
zealous ermine
Ayee I am too!
I took classes in HS tho to get a head start
It's super fun stuff, i think you are going to enjoy it
weary fiber
I wanted to do that, but my highschool only emphasized math & social studies
so... we had a literal professor teaching a constitutional law class, but in terms of CS, a singular Java class
weary fiber
eh, I took lots of APs which helped with college gen-eds
weary fiber
What classes are ya taking right now?
zealous ermine
I'm taking general CS (not really sure what to call it)
weary fiber
just the one?
zealous ermine
yeah its my major
i am taking other classes like normal accademic stuff
have you started with building real hardware?
weary fiber
How do you mean?
weary fiber
Oh, yeah I do that on my own time
currently playing with using some soviet VFDs:https://youtu.be/gl7ZYev0b4o
weary fiber
My fave project was this though: https://youtu.be/kxr4IkeiZ1s
weary fiber
thanks! it was a pretty challenging project haha
I had to learn how to use op-amps (translating analog voltage levels), 3d design (3d-printable & alignable laser mount), and make lots of hyper-efficient arduino code
zealous ermine
wow yeah thats a lot
weary fiber
well, not hyper efficient, I'm not that good
but it had to be reasonably fast to send all those signals x3
zealous ermine
for that, you need to dive into the scary world of assembly
weary fiber
I'm actually learning a bit of that for my current project
I have 8 of those tubes, turned sideways, used as 8 bar graphs
my plan is to make a music visualizer
but uh
doing FFT, transforming it into values that look good, transforming THAT into segments to turn on, piping out all that data, and doing it fast enough to multiplex the display?
And, all an an arduino uno?
it's a challenge lmao
zealous ermine
oh yeah i bet
i've been doing assembly for some time now, and that seems like quite a challenge
have you looked into different microcontrollers?
weary fiber
I realized you can have portions of your project in C++, and portions in assembly, calling the assembly code as if it were a function
zealous ermine
WHAT
weary fiber
yeah, I imagine it's just some weird pre-compiler instructions
zealous ermine
totally
the type of assembly I do is for older systems, so i have no idea how an AVR system would work
weary fiber
I taught myself ARM assembly a while back, at least as much as I could self-teach
all I could do was make a Fibonacci generator lmao
late fulcrum
AVR assembler is fairly clean. C code just compiles to assembler, and has conventions for subroutine calls, so if the assembler follows the same conventions, you can call it from C.
velvet pelican
jovial swift
and the "noise fix" is holding up in the real world?
velvet pelican
Yup pulled them fron slides in to attach my awnings
jovial swift
it is really shaping up since I saw the first pics
velvet pelican
Yeah its way way further along
Hope in another month to be almost completed on the interior... depends on how fast i can build my cabinets
jovial swift
too bad it's a 3000 mile trip for you or else i'd ask you over for a beer and some cabinet making help ๐
velvet pelican
Lol from what ive heard having a tracsaw is the best way to go
Im painting mine so if my cuts arenโt perfect i can cover with caulking and then paint and nobody has to know
jovial swift
I've played with wood working since grade school, still can't cut straight with a straight edge, a buddy is a carpenter, he holds a piece with one hand, saw in the other, zip - a perfect cut...
velvet pelican
Depends on how steady you are and having a good blade so you dont force the saw through... slow n steady
jovial swift
i mean a table saw with a guide ๐ฆ
velvet pelican
jovial swift
nice all green board
velvet pelican
Ive actually been told not to use a table saw for cabinets before lol
And just greenboard for the wet areas
jovial swift
how many sq ft will it be all done? looks big
velvet pelican
680
jovial swift
yeah wish i had green board in bath, next project needs doing...
velvet pelican
I have a buddy doing the taping n mudding. Im terrible at that part but ill hang it and texture
jovial swift
well it looks like it'll be luxurious! and hand made so you know it's done right...
zealous ermine
so i found where the code is crashing
and i found out how to fix it, but still not what the cause is
setting register Y to 0 after the cmp operation fixes it
but why?!?!?!?!?!?!??!?!?!??!??!?!?!?
jovial swift
2/3 of the way to resolving it, you know that not knowing the cause will drive you nuts...
zealous ermine
true!
but the next question is why is it only crashing at 1mhz?
how does the contents of the y register relate?
jovial swift
more bypass caps?
zealous ermine
yeah that might be it
i'll break out the logic analyzer and do some more in-depth testing soon
who knew that building a homebrew processor would lead to weeks (if not months) of debugging
zealous ermine
update again: ran more tests and yeah, the value in register Y can cause a crash during a jump to sub operation
but it gets weirder
after the crash, the last 3 bits in the program counter are set to 111, but the rest are low
its making less and less sense the more i debug it
dusty citrus
IF you figure it out it'll make some sense, in retrospect.
I have about 900 sq ft (maybe a bit less) by floor space but that's also square and up so it's cubic feet for many uses. Dropping the ceiling about 11 inches would change the heating profile I'd think (though a cold basement seems to raise the oil bill anyway).
900 sq ft floor space is a bit excessive for my 'real' needs but (of course) I expanded into that space, from where I stood just moving in.
Getting rid of a lot of clutter is now a very high priority; it's not easy to get rid of things.
velvet pelican
Thats one of the biggest challenges for everyone i think
velvet pelican
well it looks like it'll be luxurious! and hand made so you know it's done right...
Maybe done right ๐ at least to my standards which in framing and strength are pretty high. Just textured the bathroom and loft. Tomorrow is paint and loft ceiling. If done early enough the bathroom floor will get started as well