Â鶹´«Ã½

What you need:

As required for Electric candle, plus:

Piezo buzzer
Kitchen foil
Cardboard
Chopsticks

Previously, we gained mastery over light and the basics of circuits. As your devices get more complex, it will make life a lot easier if you can turn the circuit on and off without dismantling it. That means adding a switch.

Switches come in many flavours, depending on what you want them to do. But what they all have in common is that they make or break a circuit, letting you control how electricity flows. For our purposes, we need look no further than kitchen…