You can easily adapt this idea if you need a simple touch switch. Though we imagine this circuit wouldn’t work well if you were in a quiet environment. We suspect 50 or 60 Hz hum is coupling ...

A switch turns the circuit on or off by completing ... A circuit diagram helps electrical engineers know what to build. Try building simple circuits with your friends and draw diagrams to match ...

If there’re any gaps, the power won’t flow! So to control the scoop, we just need to put a break in the circuit. Let’s put a switch in there – if the switch is off it breaks the circuit ...