In contrast to many trendy microcontrollers, RP2040 doesn’t include a local capacitive contact peripheral. This doesn’t imply you possibly can’t do it – the same old software-driven method works splendidly, and solely requires an exterior pullup resistor! In case you wished an indication or you’ve got a capacitive contact venture in thoughts, this lighthearted video by [Jeremy Cook] is a should watch, and he’s received a wholesome quantity of sources for you in retailer, too!
On this video, [Jeremy] presents you with a KiCad schematic and an PCB design you should utilize to shortly add complete 23 capacitive contact sensing inputs to a Pi Pico! The board is versatile mechanically, simple to assemble as [Jeremy] demonstrates, and all of the pins concerned can nonetheless be used as common GPIOs for those who’d like. Plus, it’s totally open-source, can simply be assembled by yourself, and out there on Tindie too!
After all, such a board doesn’t get created for no cause – [Jeremy] has a wholesome quantity of musical creations and nifty concepts to point out off. We fairly preferred the trick of utilizing previous PCBs as capacitive contact sensing, utilizing copper fills as electrodes – which has helped create an amusing “macropad of macropads”, and, there’s fairly a bit extra to see.
If capacitive contact tasks ever struck a chord with you and also you take pleasure in music-related hacking, [Jeremy]’s received a whole YouTube channel you ought to take a look at. Oh, and if one of many musical tasks within the video caught your eye, it’d simply be the one we’ve featured previously!
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