Adafruit Industries, Essential service and business: NYC – Executive Order 202.6 https://blog.adafruit.com/2020/03/22/covid/ (if parts are needed for COVID-19 efforts, order and email covid19@adafruit.com)
#covid-19-engineering
south tulip
west hare
those mask are dust mask
harsh owl
note: the respirators in the picture are marked with model number 3M 8210 Plus and a rating of N95. lets please keep this channel on-topic to engineering related discussion.
https://www.3m.com/3M/en_US/company-us/all-3m-products/~/All-3M-Products/Disposable-Respirators/General-Purpose-Respirators/3M-Particulate-Respirator-8210-N95/?N=5002385+8711017+8720542+8720774+8729337+3294857497&rt=r3
dapper summit
Wanted to share some Makerspace face mask fabrication that's happening at my home base of Artisans Asylum: https://www.boston25news.com/news/somerville-artisan-coalition-working-make-gear-hospitals-amid-shortage/G6TGS2IWRNFBHNUAXIIYVH3KMQ/
Really cool to me how makerspaces are able to step up as flexible manufacturing centers in times like these. Hope to have some more news tomorrow
gentle fulcrum
It appears that UV-C LEDs can be used to disinfect. (E.g. https://customcasemart.com/products/60w-uv-germicidal-lamp-led-uvc-light-bulb). Is anyone working on ideas to exploit these?
thick nova
I've been eyeing those myself. They're easier to power than germicidal fluorescent tubes and related things like GTL3 bulbs. Nice writeup here https://www.klaran.com/how-a-uvc-led-works
stone sparrow
I've read that Ozone (O3) is also likely a good disinfectant for COVID19. I was thinking of making a box to drop mail/packages in for a few minutes to sanitize.
thick nova
I've been looking at that too: it turns out the germicidal lamps come in two varieties, the ozone free ones that provide a 254nm wavelength, and an ozone generating one that produces both 254nm and 185nm.
gentle fulcrum
Excellent info and ideas folks, thanks. One area for caution is in safety, as there are warnings about UV-C being a carcinogen and causing damage to human skin and eyes, though it seems understudied (e.g. http://www.uvresources.com/blog/uv-c-lamps-staying-safe/, https://ec.europa.eu/health/sites/health/files/scientific_committees/scheer/docs/citizens_uvc_en.pdf, https://hps.org/publicinformation/ate/q9450.html).
gentle fulcrum
Naomi Wu made a super simple DIY UV curing chamber (for curing resin 3D prints - https://youtu.be/cN1DICOnxCs?t=587) with a bucket and UV LED strip. Perhaps this could be adapted to work as a germicidal chamber if the correct LED strips could be sourced? May need to think about guarding against light leakage?
errant kelp
any opinions on this for a face shield material: https://www.amazon.com/Mybecca-54-Inch-Multipurpose-Upholstery-Projects/dp/B015QD7JXQ/ref=sr_1_15?dchild=1&keywords=bendable%2Bplastic%2Bsheets&qid=1585484863&sr=8-15&th=1
steep summit
anyone from Texas making face shields?
naive birch
We have a cookie cutter shop working with us to print them in Texas (our company is in Arizona).
@steep summit ^
steep summit
any change they have a website?
steep summit
Trying to print 100 over the next week for local hospitals, but also trying to organize more materials and other locals to work on the problem
also buy stuff from people that are helping
naive birch
Gotcha, I would reach out them them. They are printing but dont have the ability to do the visor portion at this time so they are mailing the headbands to me, but if you are local it may make more sense for you guys to work together if you can help them with the clear visor portion.
steep summit
I will reach out to them and thank you for putting that info up
naive birch
No problem
steep summit
This is awesome thanks for the share
dawn jetty
This is is good resource to get started it claims as open source but Arduino Code is not opened Yet, Every one is asking for the source code but no response from the MIT team.
dapper summit
So, a buddy of mine Rory in Seattle has just launched his project Maker Mask, which is a 3D printable respirator! https://www.makermask.com/# It requires a sign in to download right now since you need a liability waiver for PPE, but that might get repealed soon.
sleek wasp
The shields, are they able to be 3D printed or I need go buy some Plexiglass?
thick nova
While there is a way to print the shields, it's time consuming and results are poor. It's easier just to buy acetate sheets and use those.
thick nova
Right, RSSI isn't very accurate. RF signal strength is only fractionally better. You might want to use ultrasonic distance measurement or LIDAR if you want better accuracy.
I'm imagining a simple unit that just sends out ultrasonic pings and listens. If it receives a ping, it also sends one. Additionally, if it receives a ping back within X time, it turns on the beeper. However, I haven't fully thought out how to implement it to avoid coincidence issues, hearing echoes of its own ping, whether a cheap ultrasonic rangefinder could be pressed into service, etc.
I figure you might be able to modulate the pings somehow for ID. The proper transponder/housing should be able to shape the emission profile.
Similar idea, but using RF/WiFi. The problem is harder then (speed of light is much faster than speed of sound), so it requires more precise timing, but is a valid approach too.
coral rose
People often use UWB for time-of-flight RF ranging too. Decawave has a line of transceivers which do that, and other players like NXP are working on some cheap chips to do things like car-key fobs.
dawn jetty
Medtronic is mobilizing to fight the COVID-19 pandemic, They open sourced the PB560 ventilator system. https://www.medtronic.com/us-en/e/open-files.html
fossil torrent
sweet burrow
https://forum.kicad.info/t/kicad-community-meetup/22037
At 9:00 AM US PDT today, April 1st, KiCad leader developer Seth Hillbrand will be hosting a KiCad Community meetup video conference on Jisti Meet:
Last week’s meetup was nice to see and talk with other KiCad users. Let’s do it again this week.
This week, I’m happy to answer questions and I’ll be working through designing a KiCad version of the Medtronic OpenVentilator project (http://www.medtronic.com/openventilator 5). You may have heard that Medtronic (a multi-billion $ company) bought the company that cancelled the original gov’t contract 2 for low-cost ventilators in 2015 and then this week released a “kind of” open source version 3 of their current (not low-cost) ventilator.
In reality, they released scans of the schematics and some word documents for bring-up procedures. I’m going to see if we can turn the scans into a set of useful KiCad schematics + board files. This still doesn’t get to what’s needed to actually recreate more of these ventilators but it is a needed first step.
fyi - Combating COVID-19 Conference: A Collaborative Arduino Community Initiative will take place on April 2nd at 5pm CEST
https://www.arduino.cc/covid-19/conference
ionic wedge
Anyone have a preferred/fast printing 3d model they are using for face shields? I tried the prusa rc2 yesterday and it took me 4hrs (only my second print ever so.... I'm sure I've done something wrong then). Tried one that had sub hour print but it was brittle and scaled for 12"+ paper (in the US and using laminate sheets atm), currently have a working one that takes 2hr on my creator pro but looking for refinements if people have them.
sand pagoda
Just a heads up about what we are doing in West Texas -https://today.ttu.edu/posts/2020/03/Stories/3d-printed-face-masks-shields
what kind of glowforge are they using to cut the face shields?
@ionic wedge we are using the budmen model. it takes about an hour and a half on our polyprinters
marble token
Any glowforge or laser will be able to cut those
Also if you are in the NY/LI area, check out https://hackthepandemic.org
toxic scaffold
I saw the video (https://www.youtube.com/watch?v=SGlWxFGVFJg) you guys posted. I see you're using the camera software on a windows 10 tablet. I'd be willing to work on a version using a raspberry pi and parts I buy from your store. I'm in Manhattan and could pick up the hardware. If the interface is proprietary (not just a webcam) I could take a crack at writing a driver for it using libusb.
I figure if we end up with some STLs, a SDcard image, and a list of parts from you guys then this could become something people could get and put together.
If you think this would be helpful i'm very willing to work on it.
south tulip
@toxic scaffold Hello. Please email covid19@adafruit.com with your offer and we'll see what, if anything, can be done.
tight cypress
torpid stag
@tight cypress what kind of filter is that?
quartz acorn
Hey guys, what transparency sheets are you using for the US prusa face shields? I ordered some but they have just a little bit of texture which renders them blurry
torpid stag
@quartz acorn I think the stuff you got is made for inkjet printers
quartz acorn
@torpid stag I definitely did
torpid stag
did what?
quartz acorn
*get stuff for inkjet printers
torpid stag
@quartz acorn they cover with some gel type material to absorb the ink
quartz acorn
@torpid stag I didn't realize this until it arrived. 😫 I'm hoping to hear what others have had success with.
torpid stag
where are you located?
quartz acorn
Nevada - USA
torpid stag
LOL, I don't think you need to worry about it much
quartz acorn
@torpid stag I'll leave that to the local health officials to determine. Thanks for your help
torpid stag
I was joking, I think you need to looking for something that is just PET sheet, or if you just need a few maybe to trim a soda bottle will work for you.
quartz acorn
Good one. Thanks again
spice dirge
Would it be possible to make a wrist-mounted infrared thermometer for healthcare workers so that they don't have to contaminate any handheld thermometers? I was thinking of using this https://www.adafruit.com/product/1296 and an Arduino Nano with an LCD screen and somehow fit it all into a 3D-printed wrist mount, similar to a smartwatch.
Then all you'd have to do is aim your wrist at a patient's forehead, almost like Buzz Lightyear with his wrist laser.
Sorry if this is a little too ridiculous of an idea. I'm a senior in high school and I really want to help out, but I don't nearly have the level of expertise or experience that everyone here has.
coral rose
It's a good idea, but that particular sensor has a field of view of about 90 degrees, so it'll give you the average temperature of several nearby things, including the wearer's wrist, unless it's very close to the target.
tight cypress
@torpid stag I believe initially they were just PLM 3d printed masks. The design was good so now they switched to injection molds
the filter is just a little bit of material rated for hepa
torpid stag
@tight cypress Were do you even get hepa material nw days?
tight cypress
idk you can probs make it
limber hemlock
One thing to be aware of for IR sensors, is that not all have the accuracy you'd need for medical purposes. I've purchased a couple IR thermometers and they came with this disclaimer:
"NOTE: The thermometer can't measure the internal temperature of an object; Temperature readings from this devices are inanimate objects, the measured temperature for humans or animals will not be correct"
But that doesn't keep it from being sold-out. 😉
thick nova
Theoretically, you could stick a bit of polyimide tape to your target human and use that as a measurement target of known emissivity, but that's still not going to be guaranteed.
oak fern
"target human"....holy cow, I love that
young dust
hey guys I just mentioned something on linkedin
I worked on a proejct as slave labor before about 8 years ago
it's a cellulose nanofiber solvent-antisolvent chemical reaction to spin nanofibers to create filters and masks that can block viruses and such
It's from Xanofi, Inc. if you guys want to buy some fibers, it is a tech transfer off of NC-state University Dr. Orlev's lab developed it first from polymer chemists
It was one of those jobs where I couldn't even keep my notepads or anything from the job
I am not sure how far along their machine is to make fibers it was just a middle level prototype machine for the fiber machine, it is under patent right now still
It's probably progressed in 8 years
Xanofi, Inc.
543 Pylon Drive
Raleigh, North Carolina 27606
the website isn't up anymore I don't know if it's still in business
The web manager was this straight up hooker who had a bad repuation with me
I just called the old CSO on linkedin lets see if he gets back to me.
business is closed I gotta locate the machine somewhere I just looked at the seed funding it was only like $150,000 NSF funding and possibly some private investors maybe you guys can buy the machine
spring badger
@torpid stag one source for hepa material is vacuum cleaner bags. We had some 3M hepa filter bags we cut up and put into the cloth masks we made. It is harder to push air through it though, and it is hard to prevent glasses from fogging. I did get a warning from someone concerned that some hepa filters contain fiber glass strands, but the ones we used looked fine.
torpid stag
@spring badger sounds interesting ,do you have a picture of the masks?
spring badger
The pattern we used was called The Olson Pattern and has a pocket you can insert the hepa material, or sew it in.
@ionic wedge I am currently printing the Prusa RC3 US and it takes 3h on my Prusa MK2.5 with PETG filament and the recommended settings in the Prusa docs (I forget the perimeters and infill they said) I am using the 3mf file, and I can see in the sliced file name that there is a 0.25mm but I can't pick that setting just from the menu anymore. I must have updated since slicing.
spring badger
This is the PDF https://www.avera.org/app/files/public/76443/Olson-Mask-with-Pattern.pdf but you can find other instructions if you google The Olson Pattern
spring badger
Respirator? No. I am staying away from those. My robotics team (including myself) are printing these prusa models of a face shield.
marble token
Respirators are dangerous to produce at home. I would stick with designs that are in NIH review like MalaMakers filter packs
torpid stag
@marble token what is the danger?
marble token
Danger may not be the right word. I meant that without proper designs and vetting, most respirators can actually cause asphyxiation due to lack of air exchange
I recommended the MalaMakers project because they have developed a reliable filter cartage so that other 3Ddesigns can be created.
torpid stag
@marble token the filter is the easy part, I'm curious about a something like a 3d printable full face respirator.
young dust
@marble token the filter is the easy part, I'm curious about a something like a 3d printable full face respirator.
@torpid stag This is a great idea
marble token
Hmm. Let me see what I can do
torpid stag
@marble token COOL!
elfin hill
So, I've got a 3 1/2 month old infant who needs to go in for vaccinations, and lives with his grandparents who are in their 60s.
I'm looking for thoughts on how to build something akin to a "Powered Air Purifying Respirator" without trying to apply a mask or hood, instead just using it to provide an airflow over the infant's face of filtered air.
I'm imagining it with a car seat, the idea is to cover the car seat with a blanket and just provide positive air pressure from filtered air in the volume under the blanket.
My first problem is coming up with a reasonable fan I can power from a battery.
thick nova
Ordinary computer fans run on 12V but will generally run on lower voltages as well.
unkempt pulsar
sterile pilot
hey all, we're ordering face masks for our local community in Chicago. We've some distributors from China that can ship masks and they are FDA and CE certified. The certification is issued either by ICR or ECM. Does anyone know if these agencies are recognized by the US customs?
As I understand, there are more stringent checks now being performed for imported masks, and FDA and CDC are constantly issuing/updating guidelines, but there isn't enough information about which certification authority is officially recognized or which one to avoid
as far as I can tell, these are legit masks and the suppliers are legit (I've done business with them before), but unsure if we can import the masks in the country. Any info would be appreciated
desert coyote
merry cape
Hi all, new to all of this. Are these for sale? Would love to have these in our child care facility https://www.youtube.com/watch?v=SGlWxFGVFJg
dry sierra
Hey, I'm trying to develop a papr from easily sourced items. Any guides on how to make a build guide for what I'm trying to build?
fresh bay
I see several commercial products being announced which use BLE wearables to determine if two wearables (and their wearers) are within certain distance of each other and for how long. I see a general "meh" about this approach mentioned about a month ago in this channel, but I'm curious if anyone has looked into the feasibility of this approach with an Adafruit BLE Feather.
marble token
Just a reminder to people with plastic components in their extruders to take a break from PPE production to print a copy of your extruder components so that when stuff starts to melt/break, you can swap over quickly. I was speaking with Matt Stultz who said that Prusa has a ton of requests for new extruder parts right now from people who have been running their printers so long that they start to melt!
thick nova
I should get some PETG so I can print printer parts like that.
celest hatch
Too late. Part broke loose, caught the PINDA sensor on my Prusa i3 MK2. Going to try to glue. DL'ed the stls and print ... if I can get it to stick. Else maybe it's time for an upgrade.
marble token
Is the software used in the Thermal camera demo for Windows? Is there a Plug&Play version or does it need to be configured or rolled? I'm not too comfortable on the software side of things and have a client asking about the setup.
marble token
Just bumping my last question
lusty pendant
Big Clive exploits an inexpensive Adafruit UVA/UVB sensor for quick detection of phony UV sterilizers:
placid herald
@marble token if you are talking about the UniT Thermal camera it's just a regular .exe, plug and play
marble token
Hey @dry sierra I actually am putting the finishing touches on a PAPR for Hack The Pandemic. You can find the information here: https://www.hackthepandemic.org/papr
And no, we are not affiliated with Copper 3D.
dry sierra
yoo that's dope!
what are you using for the pipe/air hose?
I've been trying to use a CPAP hose and a 40mm high pressure fan but it's not a vibe
dry sierra
@marble token
marble token
I have not looked too much into the hose as we just designed it to fit the standard 3M stuff. For a fan, you need to due at least 50 cfm to move and for a loose fitting hood you need to push in excess of 140 cfm
dry sierra
:/
marble token
Honestly, most of the hard stuff is all the safety sensors. You need to measure flow, pressure, temperature, humidity, and CO2 buildup in the hood
f
dry sierra
I've been trying to use a 21CFM fan
I have 2 more, ig I can just like stack them one in front of the other? idk how fans work 😦
and for the CO2 stuff I'm going to try to see if I can rig a pulse oximeter to be like
"you need o2"
but if you're constantly pushing air through, why is Co2 buildup a problem if you're constantly getting new air
ig it's still important so people don't pass out
@marble token so what do you think I can do with 3, 21cfm fans?
marble token
3 21 CFM fans should work. You would need to put them next to each other not on top. The goal is to move a volume of air and not at a high speed necessarily. By the time a Pulse OX is detecting that you need air, you are kind of screwed. The point of an in hood sensor is to tell early if a failure has occurred so that you have time to leave the room. Let me find the OSHA guidelines
dry sierra
oh huh that's a very good point
placid herald
I had to jury rig a CO2/O2 sensor, samples air and recirculates it. It's got almost no absolute accuracy, but relative is useful for seeing which mask design is better. Sensors that will fit in a mask and have reasonable accuracy are really expensive...
dry sierra
Woah that's pretty cool
Also that filter looks like it has a huge area, must be a lot easier to breath through than the 3m half face respirators
placid herald
Yeah, and the filters are just flat sheets so easy to source, store, improvise.
marble token
Does anyone know if Adafruit will sell thermal cameras to non NYC businesses yet?
dry sierra
^
covert lava
I have an amazing idea over covid detection
scarlet lodge
Covid-19 is not funny at all. we know this all. Found one video which looks for me the best about this isssue. Have some fun people, and please STAY SAFE:
https://www.youtube.com/watch?v=BEJFD1pI2Z0
junior ether
xD
chilly citrus
i suggest the python module called covid,very good
jovial adder
Hi guys !
I wrote an article a few weeks ago about 3D printing a door pedal to open doors without touching the handle.
If any of you is interested I would love to now your opinion on the project and how I could improve it.
My 3D printer has not been delivered yet so I could not test the design if any of you tested it I would be delighted to see the result
https://www.instructables.com/id/Open-Doors-With-Your-Feet-WE-NEED-YOUR-HELP/
spiral tinsel
Hi there, im doing a school proyect with tinkercad about the covid 19,and even do i still didn't started it, i wanted to know your opinion on my idea:
i wanna make a temperature and distance detector with a piezo,lcd monitor,ldr,ultra sonic sensors,a pushbotton and a temperatur sensor.
are those componets any good for my idea?
uneven plover
quartz sleet
@spiral tinsel How professional/advance does it have to be?
spiral tinsel
not much but the date of the proyect is now over,sorry
fresh lynx
hey, Can anyone suggest a cheap alternative for MLX40914 for a no-contact thermometer?
coral rose
Don't know about price offhand, but TI has some non-contact ones.
dense nimbus
Does this works with the Pi 4 2GB version? Cause Rosetta@home uses 1,89GB of RAM minimum. And i have way less than that aviable.
The foldforcovid19 project
@uneven plover
uneven plover
it should work i think
solar token
This seems like the right channel, let me know if it's not. I have a batch of acetate 7 mil transparency sheets which were foggy, so I can't use them for face shields. I've tried stacking two sheets and laser-cutting an ear saver. It seems to have cut through, and it seems to be strong enough (running a test on that right now to make sure it doesn't rip after 12-20 hours of continuous use). I was wondering if it's safe to laser-cut the acetate sheets.
The cut was a bit messy, with some brown stuff coming out and covering the acetate (which was easily brushed off)
dense nimbus
it should work i think
@uneven plover I think not cause Rosetta@home uses natively a lot of RAM and i think even this os will use its amount of RAM which it needs to run the os even if its just a non-grapical-interface
static drum
i wanna invent a face shield that blows out clean air when you speak but i have no idea on how is it done
young heath
That's where the "invent" part comes in 😉
wind jasper
hi
gritty flame
Hello everybody
I am a grade 9 student developer from India
I am currently working on a project for covid
Can I share it with u guys here ?
@desert coyote Sir can I post my project here ?
gritty flame
And do also check out the explanatory video in YouTube - https://youtu.be/iP1sRTamuUI
Don't forget to give a suggestion/comment...advices always accepted
quasi ivy
👏
thick nova
I am amused that there are Circuit Playground masks available. https://www.redbubble.com/shop/?iaCode=u-mask&query=adafruit&ref=search_box
gritty flame
@quasi ivy Thanks for the appreciating
quasi ivy
Oks
indigo minnow
Is there anyone that can give me feedback on a product I'm developing that allows you to run code on an arduino online without needing the physical device?
storm imp
Sure @indigo minnow
granite orbit
covid-19 is is a very bad sickness that causes people to die and lose evry thing
scenic niche
dapper summit
@tacit merlin Want to post the ventilator project in this channel? @north estuary these folks made a circuitpython-powered ventilator, might be cool for the newsletter?
runic lotus
I dont mean to be negative, but ventilator running any flavor of python doesnt sound great, I would almost rather have a ventilator powered by windows. They have validated versions of rust just for applications like that
Maybe for hosting a frontend... but not for control
carmine lotus
I’d have to agree, mostly because when it comes to physical control C will almost always be faster than python.
Bit late to comment but I just saw this 😂
young heath
Fast usually isn't the issue, but predictable is.
carmine lotus
Well, that too. I was just going off projects that needed fast and accurate responses and C was chosen for those reasons.
knotty cape
Hi..I have a problem with my program I am trying to send the images I collect from the MLX90640 thanks to the Raspberry to process them in a remote PC. I am using a Raspberry 4 as a client and the data is routed to a PC. I am using the socket to start the server which is to receive and the images and thermal images. For the images connected to the camera, I took care of it my problem is to transfer the thermal images. I am currently using a wifi connection that I share with my cellphone for the tests.If necessary I will post the server code. But I have this error message I have tried many solutions and I have not found it. In fact, the Raspberry is the client and the PC is the server. So I collect data from the raspberry to transmit it to the PC for processing. I want to detect the temperature of the face and for that the MLX90640 which is connected to the Raspberry must send the thermal data. Knowing that it collects 768 values, so I want these values to be transmitted or the maximum value to be returned to the PC. Can someone help me.
import cv2
import io
import socket
import struct
import time
import pickle
import zlib
import adafruit_mlx90640
import board
import busio
import numpy as np
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect(('192.168.43.134', 8485))
connection = client_socket.makefile('wb')
i2c = busio.I2C(board.SCL, board.SDA, frequency=800000)
mlx = adafruit_mlx90640.MLX90640(i2c)
print("MLX addr detected on I2C")
print([hex(i) for i in mlx.serial_number])
mlx.refresh_rate = adafruit_mlx90640.RefreshRate.REFRESH_4_HZ
frame1 = np.zeros((24*32,))
#max_t=0
#moy = 0
#cam = cv2.VideoCapture(0)
#mlx.set(3, 32);
#mlx.set(4, 24);
img_counter = 0
encode_param = [int(cv2.IMWRITE_JPEG_QUALITY), 90]
while True:
frame = mlx.getFrame(frame1)
result, frame = cv2.imencode('.jpg', frame, encode_param)
data = zlib.compress(pickle.dumps(frame, 0))
data = pickle.dumps(frame, 0)
size = len(data)
print("{}: {}".format(img_counter, size))
client_socket.sendall(struct.pack(">L", size) + data)
img_counter += 1
@knotty cape this might be better posted in #help-with-linux-sbcs
glass sigil
Also, if its longer than few lines I would suggest using one of those text paste sites
knotty cape
Ok @fresh bay
marble nimbus
marsh scroll
dense nimbus
Here's my 7XRaspi 4B 4GB Rick with ethernet switch and all in a box with fans attached to it to support air flow at the bank and the front
I could cramp a lot more Raspi's in there but for this I need a smaller power solution, like a 3-way USB @ 1A outlet.
They are all currently running boinc client on maximum power since a few months 😍😃. Generated 50-60k points each Raspi :D
thick nova
You could use larger 5V supply to run multiple Raspis.
runic lotus
Yeah, like a ATX computer power supply
Grab one from that computer your grandmother had and is too slow for her thats now in the basement corner.
dense nimbus
Yeah but can it hold the 3 amps? I have the raspi 4B's...
thick nova
ATX style supplies can supply quite a few amps, and there are also packaged supplies that can do so.
thick nova
Most any Arduino would do for most such projects
Yes, Arduinos support that sort of thing.
It uses a language called "Wiring", which is very similar to C++.
There are boards available that run CircuitPython, which might be a better choice for you (most of them can also run Arduino code, if you care to try it out)
mystic terrace
If your grandma sadly is no longer around, check the Goodwill or other second-hand outlets.
mystic terrace
Wow sorry for that bit of randomness I thought I had posted that long ago...not sure why it’s showing up now. Glitch in the matrix? Anyhow please disregard and sorry for the randomness.
zealous adder
mental beacon
I’m working on reverse engineering my Xbox 360 network adapter. Does anyone have documentation or tips?
proper nymph
Is anybody doing something with the scd30 sensor? Its CO2 ppm measurement is fairly consistent but each temperature measurement is slightly lower than the previous one, and the humidity is higher, so after 2min I'm at 5°C and 155%rH. Soft reset and everything is well again, but …
tropic oar
Sensing the sensor is causing it to chill out and go for a dip in the pool? 🙂
deft hawk
You could use larger 5V supply to run multiple Raspis.
wouldn't it throw a low voltage warning?
thick nova
I don't think so, the RasPi normally runs on 5V, doesn't it?
deft hawk
well i have bad experience running PI of something else then official psu
mby i'm just doing something wrong
thick nova
It does draw a fair amount of current, and in a variable fashion, so you need a solid supply with plenty of current capability, that can react to changing loads quickly, and low-impedance (both resistance and inductance) wiring. Some local bulk capacitance would likely help as well.
deft hawk
hmm, I tried 5V 2.5A mobile charger then laptop charger of 5V 5A and cherry on top I hooked up pc PSU and use 5v pins, every time I get low voltage warning in some cases it wouldn't even start booting but I hooked it up with regulated PSU put 5.3V and voltage waring disappeared it occasionally appears but the most part is okay. I'm too scared to run my PI on 5.3V
thick nova
I was thinking one of the Mean Well brick supplies. I would expect the mobile chargers not to be sufficient. A PC supply might manage it, but they need special load considerations to stay in regulation. Also, your wires might have too much inductance or resistance.
deft hawk
Isnt this well power adapter?
thick nova
I was thinking something like this
deft hawk
thank you, I will try that
spiral tinsel
@thick nova Thanks! Been looking for a small PSU instead of a wall-wart for Raspberry Pi 3B plus a 1A 5V load (Lumex 96x8 RGB array).
The 'everything plugs in via molded connectors' approach was going to present too many connections inline with the PSU by using off the shelf stuff. Wanted screw terminals instead (lower resistance bonding).
Those are like 12 bux at DigiKey for a 25W model (5V 5A) which hits the sweet spot, I think.
https://www.digikey.com/short/8r7qff79 Mean Well (haha) RS-25-5
visual nimbus
Ohhhh that's a good price
frozen carbon
And their shipping is less that Digikey. I just got another one from Mouser today for a Pi on a 3d printer.
steep jetty
visual nimbus
I need to print a new mask
fair sequoia
We need to use our engineering knowledge to create solutions for COVID-19.
I tought in create a timer to measure the last time a person got out of the room, them the timer will tell me when it's safe to take out my mask.
What do you think?
coral rose
Bonus points for incorporating a CO2 / VOC air-quality sensor to try to correct for the effects of good versus bad ventilation.
visual nimbus
We'd need better data on how long viral contamination may hang in the air -- and I'm not sure there's much data regarding that
half light
Yeah, I agree