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Is the DEV-09815 motor shield from sparkfun compatible with the Arduino Mega 2560? Does the DEV-09815 require any protection from back EMF if I'm powering the Tamiya dual motor gearbox? Thank you.
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Yes, it should be. Digital lines 3 and 11 are used for PWM and both those pins are PWM-capable on the Uno and the Mega2560.

Back-EMF protection is provided by 8 diodes on the shield so no additional protection should be needed.

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The Gadget Shield: accelerometer, RGB LED, IR transmit/receive, speaker, microphone, light sensor, potentiometer, pushbuttons

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Thank you for your reply, much appreciated.
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