The idea behind our project was to create mini piano using Arduino. Since we wanted each button to play one note and have many keys, we decided to use multiplexer for the inputs instead of connecting ...

An Arduino Pro Mini drives an LSM303DLHC compass/accelerometer breakout board and a 12-LED NeoPixel ring. The heading is indicated with a red ‘Pixel between two yellow ones.

The core of the watch is an Arduino Mini. To make it good for time telling, a real-time clock module was added. A DHT11 monitors the temperature and humidity.

It’s going to be incredibly exciting to see how the Arduino community reacts to it. We can only imagine what you guys can achieve with the extra features of the Nano RP2040 Connect board.” ...

We'll mount and connect it to the Arduino using only a 2-pin header for two-wire (SDA & SCL - I2C) communication and a couple more wires for power. As the motion sensor works with voltage ranges ...

The YouTube channel DIY Builder has published and created a DIY Arduino laser engraver which is powered by an Arduino Nano development board and is fitted with a 200-250mW 650nm Laser Module.