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HowTo: Raspberry Pi - Evaluate MPR121 touch sensor via I2C and Node Red - Nerdiy.de - Nerdy DIY HowTo's about electronic, 3D-printing and more.
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Adafruit Capacitive Touch HAT for Raspberry Pi - Mini Kit [MPR121] : ID 2340 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Python & CircuitPython | Adafruit MPR121 12-Key Capacitive Touch Sensor Breakout Tutorial | Adafruit Learning System
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Overview | MPR121 Capacitive Touch Sensor on Raspberry Pi & BeagleBone Black | Adafruit Learning System
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