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Support Forum » DC Motor tutorial - power

April 16, 2012
by mcgroover
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I am looking through the "motor and microcontroller" tutorial and just wanted to clarify the power supply to the motor. Does the motor require its own power supply? If so, should the power and ground just be connected to two empty rows?

April 16, 2012
by pcbolt
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Generally it's a real good idea to have a separate power supply. It doesn't take much current draw from the voltage regulator to reset the MCU. You can use two unused rows for power and ground, that shouldn't be a problem...just make sure nothing else gets connected there. You can get more info on the Servo-Squirter NK tutorial about this as well.

April 17, 2012
by missle3944
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No it does not, going off of what pcbolt said, but it is also a good idea to have a walwart adapter so the motor doesn't wear down the battery and you have to constantly keep buying new 9v batteries.


April 17, 2012
by mcgroover
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But if you are using a battery to power the microcontroller and motor, how much of the voltage gets used to power the microcontroller (and hence taking away voltage that could be used to power the motor)?

April 18, 2012
by Ralphxyz
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The battery drain of any motor will be greater than that of the mcu. So you could run both from the same source.

The "amount" of drain of the mcu compared to a motor would be minuscule.

Up to you to decide which is best or most practical.


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