Don’t forget to connect Arduino GND to pin 5 on the module as well to complete the circuit. This can be fed to your Arduino’s 5V pin to power it from the motors’ power supply.
If you supply is up to 12V you can leave in the 12V jumper (point 3 in the image above) and 5V will be available from pin 6 on the module. Next, connect your power supply – the positive to pin 4 on the module and negative/GND to pin 5. Otherwise you may need to swap them over when you set both motors to forward and one goes backwards! If you’re using two motors for a robot (etc) ensure that the polarity of the motors is the same on both inputs. First connect each motor to the A and B connections on the L298N module. To control one or two DC motors is quite easy with the L298N H-bridge module.
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