The toughest part of this design was making it fit inside a Raspberry Pi. The existing Raspberry Pi headers actually go all the way through the board and it sits approximately 2mm above the Raspberry Pi (very close). It’s almost as if the board was part of the original board.
Because it sits so close to the Raspberry Pi, care has been taken to ensure that any thru-hole components avoid components on the Raspberry Pi board (so they don’t short them out), and to avoid restricting air getting to the main ARM processor.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.