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adafruit
2d ago
Desk of Ladyada - Load Cells & HID Keyboards https://youtu.be/HoPInrsFSDI
Waiting for prototype PCBs, we started new projects. We’re designing an HX711 breakout board with SPI for multiple sensors and updating the NAU7802. Also exploring CH9328 for HID keyboards via UART. Looking for compact 1.27mm pitch SMT DIP switches on DigiKey for a new design ..read more
adafruit
2w ago
Preview - Stemma plug-n-play adapter for DS18B20’s
one of the perks of working at adafruit is you get to request hardware - and you’ll probably get fast turnaround! one of our adafruit.io dev’s requested “an easy way to chain DS18B20 sensors for testing with adafruit.io’s wippersnapper service” (https://learn.adafruit.com/using-ds18b20-temperature-sensor-with-wippersnapper) at 11:54am and after a few back-and-forth’s we spun up this prototype idea. you can use JST 3-pin cables (https://www.adafruit.com/product/4336) to ‘chain’ the adapters. then screw terminals mean you can easily connect DS1 ..read more
adafruit
2w ago
CH552 QT Py Tester is Ready to Rock
We designed this CH552-based QT Py to play around with this ‘40 cent’ USB-capable chip, and it’s been super fun! now the hardware is complete and assembled, its time to test it so it can go into the shop. we wrote a test sketch in Arduino (https://github.com/DeqingSun/ch55xduino) board support package to verify the GPIO are working right on the pogo bed. the test output goes to the USB serial port which is then read by a python script. to program it, we use the raspberry pi and ch552tool (https://github.com/MarsTechHAN/ch552tool), we can enumerate, test and ..read more
adafruit
2w ago
Preview! More RISC-y endeavors with CH32V203
we had so much fun with our CH552 QT Py design, (https://blog.adafruit.com/2024/04/15/desk-of-ladyada-the-8051-throwback-episode-ch552-deskofladyada-adafruit-adafruit/) we thought maybe we could make a board with it’s ‘big sister’ the “35 cent” RISC-V based CH32V203. (https://www.wch-ic.com/products/CH32V203.html). this is the CH32V203G6 which is a QFN-28 version of the chip, with 32KB of Flash and 10KB of SRAM. we would have preferred to use the F8 QFN-20 with double the flash and RAM, but this variant part was easier to buy. we wanted to get goin ..read more