I learned some days ago how #moisture gets trapped inside #sealed enclosures used for #electronics when exposed to daily cycles of heat and cold.
The cold creates lower pressure inside. If that overpowers the seals, then outside air gets sucked in, carrying moisture. This extra moisture can condense inside and accumulate at the bottom.
In the next warm part of the cycle, if some air is expelled because of the higher pressure, that moisture is not carried out because it is in a liquid state.🧵
Repeat this a lot of times, and you will get the electronic circuit diving inside the enclosure 😂
I want to measure how the humidity and pressure fluctuate inside an enclosure that I'm prototyping for an industrial composting temperature sensor, so I assembled a quick hack with an Adafruit ESP32 Feather V2 running SensorWatcher that will report that every 10 minutes. The sensors are an HTU31D for humidity and a BMP388 for pressure.🧵
I'm always on the lookout for tiny electronics to use in miniatures (as one does) and I especially want a small board that can run a reasonable Linux. The Luckfox pico mini checks many of the boxes (size, price, speed, storage, etc) though as usual the big question mark with these relatively short run boards is software and support. https://a.aliexpress.com/_mqYEbwO https://youtu.be/1W7ku0vcA1k
The main reason I default to using #Adafruit products is their top notch documentation and community support. Their stuff is easy for me to use but more importantly I rarely need to help customers because they find all of the info they need on the Adafruit learn system. For a one person co like mine, that's a huge win.
My initial goal for the cost of the hardware for a #RaspberryPi based home #Nightscout deployment, including the board, case, storage, and power, was to keep it under $100. With taxes, I think I can get a minimum of about $65 plus shipping. You can go with upgraded hardware and still keep it under $100.
Another observation is, man, Raspberry Pi 4 is expensive on Amazon. Don’t buy them there. Go to #Adafruit or #SeeedStudio.
My #morningrun didn't go as planned today. Temperature was -5°C and my old phone suddenly drained its battery at km 4. I really need a new one 😭!
So I went back, but with no music to keep me focused I stopped after 2ish km.
I must have run for about 6 km only.
Here's an idea buzzing on my mind since some time. I'd like to build a portable wrist device to monitor my HR.
💚 A green LED is ON in zone 2
💛 A yellow LED for zone 3
❤️ A red LED for zone 4+
Then, if this works, I'd like to add a GPS module buzzing and lighting a 💙 LED at every km.
In the past I've tinkered a bit with #Arduino#Lilypad and #Adafruit#eWearable components. Unfortunately there weren't enough modules back then and I lost interest.
My PyGamer handheld game device arrived yesterday! It’s no Steam Deck, but for me, it’s better because it’s good hardware and programming practice, and costs a tenth as much! Looking forward to coding on it! 💻
No luck yet - dumping the firmware and also dumping the APP was not successful. Now ordered an #BLE sniffer (available from #Adafruit btw.) - #TrailCamera reverse engineering
I load to current Circuit Python, it copies over and....
The device does NOT show the CircuitPython directory
I can load a makecode program from maker.makecode.com and see it work fine. So my data transfer is working fine - Circuit Python just doesn't activate.
At long last, the 1:10 scale Connection Machine miniature is complete and listed on my store! It takes quite a bit of time to build so currently there's only one listed. As someone who never knows what will sell, perhaps it will be the last one. 🤷 😺
This was a fun one! https://store.transmutable.com/l/ecm2 #retrocomputing#miniatures#cm#restock
These little boogers are what drive the display in the electronic 1:6 scale TRS-80 Model III minis. The board with the USB port is an Adafruit QT Py ESP32-S3 with wifi and BLE. The bottom board is an adapter for their EyeSPI ribbon cable that connects to the display. The same setup will be in the NeXTcube w/MegaPixel minis and eventually in tiny Xerox Altos. #adafruit#miniatures
I wonder whether I could trim down the circuit board behind this display panel to be the same footprint as the display panel without cutting anything important. I only want to use the EyeSPI connector and I don't want mounting holes. Otherwise I'll need to make an identical board but slightly smaller. #adafruit https://www.adafruit.com/product/1673
Many of my exhibit installations at national parks are not connected to the internet because… they are too remote! Hooray! No internet! Go nature! I manage the device shutdown schedule using #Adafruit DS3231 real time clock module. Works great! Ask me how I manage the daily startup. #raspberrypi#museum#maker
This is the general configuration for the electronics that will live inside the tiny TRS-80 Model III. It's a QT Py running CircuitPython driving a TFT via SPI. #adafruit#miniatures#python
This light and proximity sensor using the VCNL4020 https://www.digikey.com/en/products/detail/vishay-semiconductor-opto-division/VCNL4020-GS08/2813348 was designed a few months ago, but we were dragging our feet on writing the library code as its kind of a tedious process. Now, with our new BFF ChatGPT4, we can crank through a library with minimal typing. Of course, we check each function and #define as it is written - sometimes typos and misunderstandings come through.
Folks, help me out please: There’s been some controversy around #Adafruit some time ago, but I don’t remember what it was. But one of you certainly does, right? I think it was some kind of LGBTQIA+ issue, but I’m not sure about that.
Edit: Found it, at least the thing I was referring to. It was NFTs and bullying people. See my reply below for details.
Okay, I had to dig out my Twitter archive and use archive.org, but I found out what the #Adafruit controversy I remembered was about: It was NFT crap, and bullying users who criticized them. Back in 2021.