Arduino Micro has some extra leds that it is tricky to programme. Like almost all Arduinos, has a built-in led – the green one on the left in the photo. And it has a pair of yellow leds – called TX ...

The inexpensive module (shown above) provides easy access to the MCP4725 12-bit DAC. According to the official datasheet, the device address contains four fixed bits (device code = 1100) and three ...