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CH32V003J4M6 - Miniature microcontroller board
I wanted something small but relatively capable, and since I have some experience with the CH32V003J4M6 chip from my other projects (remote-controlled fume extractor, breadboard voltmeter, low-power applications), I decided to make this board based on the chip. This chip has an SOIC-8 package, so it is a simple 8-pin SMD chip. Similar to the Attiny85, but it is a bit more powerful.
Update 2026-03-04:
Based on this little board, I built a small weather station. I used a 0.42" OLED display and a BME280 combined pressure, temperature and humidity sensor. The project has a small 3d-printable enclosure. The design files can be found below.
CH32V003J4M6 - Miniature microcontroller board
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