user71019: I recently bought an L298 motor driver module for controlling 2 motors(5v each).
When i connect the power supply(which is a normal RC car battery holder(3)) the red light doesn't light up.
Instead if i connect the +ve to the 5v on the motor driver, the red light is glowing, but the motors don't work.

user75377: You need to do math on the power consumption as arduino uno takes takes 5 V 500 mA at least for it to work. That is why it can be powered by USB cables too.
Now if you try calculating power consumption on the motors you would understand that the power you are giving is nowhere enough for the arrangement to work or you could have been able to run the motors without the motor driver.
Try upgrading the power you are giving.

71019: <p>I recently bought an L298 motor driver module for controlling 2 motors(5v each).</p>
<p>When i connect the power supply(which is a normal RC car battery holder(3)) the red light doesn't light up.</p>
<p>Instead if i connect the +ve to the 5v on the motor driver, the red light is glowing, but the motors don't work.</p>
 75377: <p>You need to do math on the power consumption as arduino uno takes takes 5 V 500 mA at least for it to work. That is why it can be powered by USB cables too.
Now if you try calculating power consumption on the motors you would understand that the power you are giving is nowhere enough for the arrangement to work or you could have been able to run the motors without the motor driver.
Try upgrading the power you are giving.</p>
