The Servo Power board is for the classic Marcduino compact. The Marcduino can’t provide enough power for all servos at the same time – you’ll notice it on sequences when you get a brownout and the Marcduino resets.
The Servoboard gets only the signal wires from the Marcduino and has it’s own power input for the servos. Please use a stable power source (5-6V >2.5A)
Available at shop.printed-droid.com