#hardwaretesting

This 1.3" round TFT display will be in the shop soon, thanks to this tester, which lets us quickly verify all functionality: We're reading a display bitmap off of the SD card, displaying it, and then pulsing the backlight. We do this all through the EYESPI connector https://www.adafruit.com/search?q=eyespi and this one is passing just fine. After we package the display, we can stock it in the shop!

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OK, our 10164227-1004A1RLF (https://www.digikey.com/short/3z8mb49f) Compute Module connectors came in, so we're ready to fab this prototype of our Compute Module 4 or 5 backpack. Timon updated it to have an EYESPI connector to bring out some GPIO's and make it easy to connect small displays. There's so much packed on here; we're worried about how we're going to make a test jig for so many connectors! We may need to use an IO multiplexer to address so many pins with a microcontroller - while using a CM5 to do the test sounds 'fun,' it would not be good to have such a delicate board used for testing hundreds or thousands of these in the fabrication department.

WLED-compatible board. We're doing the audio-reactive test with the built-in I2S microphone this time. This digital mic will give great audio quality without needing any extra work. If you want an external mic wired far away, there are GPIOs exposed that you can solder to for another I2S connection - ESP32 lets you use any pins, which is nice! this demo is a graphical equalizer that makes verification easy! All we have left is to test the IR remote and fuse, and we're good to go!

Sparkle Motion Mini testers. The Mini came together fast, but classic testers had cascading issues. We used Claude for firmware and got cool samples, including filament letters and enclosures for Sparkle Motion Stick. And our dinosaur tissue holder fell, disassembling an arm! Time to find strong foam tape for reattachment.

OK, after a long hiatus, the ESP32 Itsy Bitsy prototypes are built and ready for testing! We first designed this board Feb 20, 2020 - and it's been waiting oh so patiently for its turn. The ESP32 Pico module packs 8 MB of flash and 2 MB of PSRAM. Despite its small size this board can handle fairly complex programs. This board is very small but has lots of pins, with a USB-serial converter, NeoPixel, reset and user button, Stemma QT connector, and a 5V-logic output specifically for driving NeoPixels. to do my final 'all in one' test we're reading temperature and humidity from an I2C sensor, sending it to IO, then reading back the onboard NeoPixel color from the dashboard. It's an excellent way to make sure the whole thing is working the way we like. Last up, we'll do a low-power test, and then it'll be ready for fabrication!

The Adafruit TS3USB30 1 to 2 USB Switch is a nifty breakout board for the TI TS3USB30 (https://www.digikey.com/en/products/detail/texas-instruments/TS3USB30ERSWR/2092506) that will let you connect one of two USB devices to a single port, handy when you have multiple chips that you may want to communicate over USB but you don't want a hub. Our new breakout will connect one or the other. We designed for USB to handle high bandwidth USB 2.0 connections of 480 Mbps. But before we put it into stock, we gotta test it! This tester has two different USB peripherals connected: a CP2102 on a Metro Mini and an FT232RL in a console cable. We're using the Metro RP2040's bit-banging USB host stack (https://learn.adafruit.com/adafruit-feather-rp2040-with-usb-type-a-host) to test enumeration: when the RP2040 detects two different PIDs based on the switching pin, we know the board is good!

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