user8025: So I have 3 ground pins, but I need 4 motors on my Arduino. Can I connect multiple motors to the same ground pin?

user8431: 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

user2973: 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.

user8420: 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.

8025: <p>So I have 3 ground pins, but I need 4 motors on my Arduino. Can I connect multiple motors to the same ground pin?</p>
 8431: <p>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</p>
 2973: <p>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.</p>
 8420: <p>All ground is internal connected.<br>
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.</p>
