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Note: Flyduino - A 12 Servo Controller (Arduino Compatible) is discontinued now.
This is probably the smallest Arduino compatible controller speically designed for controlling servos. It features a 12 standard servo control capbility with an Xbee socket which can be used in model helicopters or UAVs via the Xbee link. The feather weight (7.5g) makes it an ideal controller for application with a limited payload. The built in regulator allows the input voltage to vary from 3.5-8V which fits most power supplies without any modification.
With the use of Arduino IDE, the coding becomes extremely easy.
Note: A FTDI Basic breakout is required to upload the program (@3.3V)
Warning: The controller is working under 3.3V, please do not program it with a 5V FTDI breakout, it will damage the module permanently.