Circuit Diagram

Connections

The circuit diagram above shows how the components will be wired together. This won't be 100% exact in the actual circuit but it's a very close approximation. Please note the buttons connected to the capacitive touch sensor do not have to be buttons. They can be any piece of electrically conductive material.

  • Slide Switch to GND and EN pins on Adafruit Feather 32u4 Bluefruit LE
  • VCC from NeoPixel to 3V on Adafruit Feather 32u4 Bluefruit LE
  • GND from NeoPixel to GND on Adafruit Feather 32u4 Bluefruit LE
  • Data In from NeoPixel to #6 on Adafruit Feather 32u4 Bluefruit LE
  • SCL from MPR121 to SCL on Adafruit Feather 32u4 Bluefruit LE
  • SDA from MPR121 to SDA on Adafruit Feather 32u4 Bluefruit LE
  • IRQ from MPR121 to A4 on Adafruit Feather 32u4 Bluefruit LE
  • GND from MPR121 to GND on Adafruit Feather 32u4 Bluefruit LE
  • VIN from MPR121 to 3V on Adafruit Feather 32u4 Bluefruit LE
  • 0-5 on MPR121 to Touch Pads

Battery Power

The circuit will be powered by a 3.7V 2500mAh Lithium ion battery via JST connection. The battery plugs directly into the Adafruit Feather 32u4 Bluefruit LE, which allows had a built-in charging circuit so you can recharge the lipo battery over the microUSB port.

This guide was first published on Feb 15, 2017. It was last updated on Feb 15, 2017. This page (Circuit Diagram) was last updated on Nov 20, 2019.