Hi, I'm using the sparkfun GSM shield: https://www.sparkfun.com/products/9607 . It's currently working fine and I have a 5V power supply going into the 5V pin on the arduino as advised here: http://tronixstuff.wordpress.com/2011/01/19/tutorial-arduino-and-gsm-cellular-part-one/ . I now want to powe…

GSM and motor shield power advice

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