Circuit Diagram

This provides a visual reference for wiring of the components. They aren't true to scale, just meant to be used as reference. The NeoPixel strip features alligator clips that connect directly to the pads on the Circuit Playground Express.

Power Pack

The 3xAAA battery pack can supply ~4.5V which is suffice to power the Circuit Playground Express and 30 count NeoPixel strip. The battery plugs directs into the JST connector. 

Wired Connections


  • Orange signal wire connect from the Servo to A1 on Circuit Playground Express
  • Brown ground wire connects from the Servo to GND on Circuit Playground Express
  • Red power wire connects from the Servo to VOUT on the Circuit Playground Express

NeoPixel Strip

The following connections are setup for the program in MakeCode. The data input from the NeoPixel can be switched to any available pins (except for A0 but OK on A1-A7 ) on the Circuit Playground. 

  • GND from NeoPixel strip to GND on Circuit Playground Express
  • DIN from NeoPixel strip to A7 on Circuit Playground Express
  • 5V from NeoPixel strip to 3V on Circuit Playground Express

Foot Switch

  • A2 on the Circuit Playground Express connects to one of the cardboard squares
  • A3 on the Circuit Playground Express connects to the other cardboard square


This guide was first published on Dec 12, 2018. It was last updated on Mar 08, 2024.

This page (Circuit Diagram) was last updated on Mar 08, 2024.

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