Hi, I'm controlling two identical DC gear motors with arduino and a L298N. I'm powering the arduino from USB and the L298 with a power supply (7.5 v / 300mA). One of the motors is clearly spinning a bit slower than the other. I tried also connecting ENA & ENB to PWM digital pins and I need to reduce the speed in one of the motors in order to get both spinning at the same pace.
My understanding is that the L298N provides simetrical output on both sides. What could be the cause of this problem and how could I avoid it without using different PWM dutiy cycle values for each motor?