I am trying to make a robot and I have some problems with the L298N motor driver. I supplied it with 9 V and used its 5 V output to one of the pins. I put two motors at both motor outputs and the motors don't move or move erratically.
I measured the voltage across several points:
- I tried measuring the voltage across the two input terminals and it was 5.1 V.
- When I took out the motors and measured the voltage between the output two output terminals for one of the motors it was 5 V.
- When I put back the motors and measured the same terminals again it was 0.2 V.
- When I replaced the motors with LEDs, the LEDs lit and the voltage between the terminals was 3.6 V.
My question is: why is the voltage across the output terminals so low when I connect the motor?