You will need the Arduino Board, a 560Ω resistor, and LED and the code example below. We set the pinButton variable as integer 8 and we connect the button at pin 8 on the Board. Then the LED is ...

But if you’re going to really go far you’ll also need to get good at electronics, which was part of the reason behind this Arduino servo tester. [Peter Pokojny] decided to take the plunge ...