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I have noticed that while hooking up arcade buttons to the GPIO set on the model b board that along with the joystick I should be able (by assigning certain GPIO pins to ground) to connect 7 other buttons with individual grounds. However if I could attach multiple inputs to the same couple of ground pins (probably something rough like soldering the ground wires together) I could connect something like 11 buttons. Would it be likely for this to cause an issue with the input buttons? I am very new to this sort of thing, thank you for your time.

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you need only 1 (one) ground pin for does not matter how many input buttons. there's absolutely no reason to use any other pin as a ground as long as you have one already used.

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Excellent, That is what I was hoping to hear. Thank you. – Caritaspax Apr 13 '14 at 17:22
You could also hook them up to an Arduino, and then send that data via USB. – AwesomeUser Apr 14 '14 at 0:53

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