This guide will use the capacitive touch pads on the Circuit Playground Express and the capacitive properties of fruit to create a full scale tone piano. We will write the code using CircuitPython to use each of the touch pads to light up the Neopixels in a different color and play a different tone through the onboard speaker.
We've taken the original Circuit Playground Classic and made it even better! Not only did we pack even more sensors in, we also made it even easier to program. The board is round and has alligator-clip pads around it so you don't have to solder or sew to make it work. You can power it from USB, a AAA battery pack, or with a Lipoly battery (for advanced users). Circuit Playground Express has built-in USB support. Built in USB means you plug it in to program it and it just shows up, no special cable or adapter required. Just program your code into the board then take it on the go!
One of the great and features of the Circuit Playground Express is the addition of an infrared transmitter and receiver. In this tutorial you will learn how to receive and decode IR signals from a remote control such as those used for TV, DVD, cable boxes and how to transmit IR signals making your Circuit Playground Express an IR remote itself.
Use Circuit Playground to make a classy seashell necklace that goes with every outfit. Change colors and brightness on the fly with a click of Circuit Playground's onboard buttons. We even included a sound reactive mode to invoke Ariel's necklace from the Little Mermaid. This is an easy project that kids of all ages will adore.