Touch inputs with Raspberry Pi Pico

Poke data into Pico – no buttons needed

Ben Everard @ben_everard Ben's house is slowly being taken over by 3D printers. He plans to solve this by printing an extension, once he gets enough printers. Raspberry Pi Pico doesn’t have capacitive touch hardware on board. However, that doesn’t mean we can’t use capacitive touch. To understand how, we first need to learn a little about how capacitive touch works. All electrical conductors have some amount of capacitance – basically, this is an ability to store electrical charge. If you put one end of a wire into a circuit without the other end attached, you might think that no electricity flows, but actually, a little does. It charges the wire and this small charge will remain stored in the wire until it’s discharged. How much charge it stores depends…

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The MagPi (Digital) - 1 Issue, #112

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