The MarcDuino system is based on Arduino. It controls animatronics (panel movement, lights and sound) of the droid.
It was developed by Mowee/Curiousmarc.
This is a Marcduino v1.5 PCB:
His site can be found here:
The Marcduino v1 and v2.0 are outdated. You should go with the v1.5 (Marcduino compact). It runs the latest Firmware and is pretty small.
The system uses 2 Marcduino boards. The Master and the Slave board. Hardware is the same, they differ by the flashed firmware.
The Master controls the Dome panels and Sound . The Slave controls the Holo Projectors and Lights
You can buy Marcduino Boards on the Astromech Forum or solder them by yourself.
The support thread on Astromech: https://astromech.net/forums/showthread.php?28414-Support-Thread-for-MarcDuino-v1-5-s
If you want to solder them by yourself, here’s the needed component list:
Software for the MarcDuino:
Firmware for MarcDuino:
Just follow the instructions