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I have a raspberry pi model B, NO B+ OR 2B, jus the model B. I am using it as a brain for a robot but I’m having a little trouble with the motors. I am using the GPIO pins to power it but when I set the output to high, I get under the required 3.3 volts. It’s no the motor because it works on the 3v3 pin. Please help. Thanks in advance.

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    The GPIO pins deliver nearly no current, you can't use them to drive a motor. Perhaps investigate a motor controller driven by the GPIO but supplied by a suitable power source for your motors load. – tobyd Mar 7 '18 at 20:57
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    You run the risk of destroying your Pi if you connect motor leads direct to the GPIO. – joan Mar 7 '18 at 21:13
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I realized that I could use a transistor. To all the people like me, just use a transistor and connect the + to a 5v or 3v3 pin.

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