Pi Cobbler Kit
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Pi Cobbler Kit

by NewPiUser1 on Thu Feb 21, 2013 2:47 pm

Hello I recently baught a Pi Cobbler. I am busy working through the lessons in the Raspberry Pi Adafruit learning system. I am interested in trying lesson 8 on using a Servo Motor with the Raspberry Pi and Cobbler. However I have just one concern. Excuse my ignorance. I see the Servo would be powered by a battery pack of 6 volts but the Rasperry pi can only handle 3.5 volts. Is there any chance I can damage my Raspberry Pi by "frying" it.

Obviously I will be careful to follow the instructions carefully. I realise that the signal going into the pi from the servo motor is 3.5 volts. I also realise that only the servo is powered by a battery pack of 6 volts.

However I am still a bit concerned.
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Re: Pi Cobbler Kit

by tldr on Fri Feb 22, 2013 1:47 am

just be careful. i once plugged a 19v laptop power supply in to a 5v display. the display briefly looked very cool, then sounded very strange and then smelled very bad.
"If I had known it was harmless, I would have killed it myself." - Phillip K. Dick, A Scanner Darkly
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Re: Pi Cobbler Kit

by adafruit_support_bill on Fri Feb 22, 2013 10:24 am

Anytime you have low-voltage circuits controlling high-powered devices there is this concern. If you look at the servo connector, it has been designed so that even if you plug it in backwards, the servo power voltage is always on the center pin so it can't damage the control circuitry inside the servo.

As tldr says, just be careful and double check all connections before actually applying power.
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