This provides a visual reference for wiring of the components. They aren't true to scale, just meant to be used as reference.
The 3xAAA battery pack can supply ~4.5V which is suffice to power the Circuit Playground Express. The battery plugs directs into the JST connector.
NeoPixel Strip + Extension Alligator Clips
The Alligator clip Neopixel strips connects to the pads on Circuit Playground Express. The wires on the Strip will need a small extension to reach the blade. We used short Alligator clips to join the strip to the Circuit Playground.
Red connects to Vout
White connects to A1
Black connects to GND