Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — ...

The code is for directly controlling the LED matrix (I had made a 10X8 matrix) through Arduino Uno. Here, I have used multiplexing which makes the task a bit difficult to understand at first. But once ...

No multimeter handy (for shame)? Well, as it turns out you can actually measure capacitance using your Arduino Uno, with no external components, and only ~20 lines of code.