An open-source robot controlled by musical notes
Based on the Arduino Uno - Atmega328P (easily compatible with other Arduino boards)
Can be found under /schematics Two versions: Wigl v0.1 - a small board with all necessary components and 4 mount holes Wigl V0.1-KIT - Similar to above, but circular and has cutouts for wheels, motor mount holes, etc.
Wigl is available under the MIT License