Use same ground with 2 wires?

Question

So I have 3 ground pins, but I need 4 motors on my Arduino. Can I connect multiple motors to the same ground pin?

Arduino cannot power a motor directly – aaa Apr 08 '15 at 05:05 — aaa, Apr 08 '15 at 05:05

score 2 · Answer 1 · answered Apr 12 '15 at 17:21

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All ground is internal connected.
But anyway, you CANNOT use the Arduino's power to power a motor, you will need an external power source.And again, you will connect the external power source's ground to the Arduino's ground.

answered Apr 12 '15 at 17:21

Mathsman 100

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If you power a motor directly from an Arduino, the Arduino's microprocessor (e.g. AtMega328P) will get fried. – Mathsman 100 Apr 13 '15 at 10:59
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And while using the motors, make sure that the motor does not touch the Arduino board – Mathsman 100 Apr 13 '15 at 11:00
How do I control the motor then? I need to control the speed of the motor. How would I do this? – Mathias Bøgebjerg Apr 13 '15 at 21:41
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link for more info on how to do that. – Mathsman 100 Apr 14 '15 at 08:31
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If you are having problem in coding, comment here and I will give you some sample codes. – Mathsman 100 Apr 14 '15 at 08:32

score 2 · Answer 2 · answered Apr 08 '15 at 06:32

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You can do it as long as the current isn't excessive. I don't think there are any specs available, but the connector and the width / thickness of the copper tracks on the PCB will be the limiting factor.

answered Apr 08 '15 at 06:32

user2973

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score 1 · Answer 3 · answered Apr 12 '15 at 23:34

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You can connect multiple components to a single ground pin. IF you are using a breadboard, be sure to put the wire going to the go

answered Apr 12 '15 at 23:34

Bobdabiulder

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Use same ground with 2 wires?

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