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购买 mpr121 capacitive touch sensor
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gadgetronicx.com
Make any surface touch sensitive with MPR121 and Arduino - Gadgetronicx
Interfacing MPR121 with Arduino to make any surface touch sensitive. Capacitive touch sensor MPR121 breakout board tutorial on interfacing with Arduino uno. Learn how to make any surface react to touch and use that surface to feed input to your arduino and control other elements using that.
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