The buttons and the punch card contacts are connected to the Pi via MCP23017 I2C port expanders, since the square display provides a handy I2C pass-through.

APC issue 542 (February) is now available, ensuring you never miss another software update.

20 Arduino based project ideas with codes and circuit diagram. I performed all of these at my university. - Releases · almdpro/20-Arduino-based-project-ideas-with-codes-and-circuit-diagram ...

arduino i2c dht11 spi ssd1306 oled-display potentiometer i2c-display ili9341 tft-display oled-display-ssd1306 ili9488 st7789 expansion-board esp32-s3 dht11-temperature-sensor Updated 3 weeks ago C ...