• Crunch-E is a keychain form factor music-making platform that is both limited and limitless. The current software supports 4 tracks, 10 synth instruments, and 2 drum machine banks, but who knows where developers will take the open-source software next?

• Crunch-E hardware comes in a few flavors. You can build it yourself on the cheap, use the schematic to design your own PCB.

• Crunch-E hardware consists of an ESP32 microprocessor, a MAX98357A I2S sound amplifier, 4 LEDs, and an LM1117 power regulator. It can be obtained in a fully manufactured and very sleek form, or it can be built out of development and breakout boards (ESP32 dev boards, MAX98357 breakout boards, and Arduino keypads can all be purchased on AliExpress or Amazon for a reasonable price).

• DIY Build Parts:
  ESP32 Dev Board
  Max98357 Breakout Board
  Arduino Compatible Keypad
  4 LEDs + Required Resistors

CrunchOS GitHub : GitHub
Scroll down for schematics.

• Contact togglebossgames@gmail.com with any questions.

Function button cheat sheet, press one of the four Fnc buttons and then make your selection

DIY version, as long as you got the time this should cost under $10USD

A wild DIY Crunch-e from reddit!