krishnan.asish
Newbie level 2
Iam using a PIC17F877A micro-controller to drive two DC motors (which I got from identical small toy cars) via L293D h-bridge.
I don't know about the specifications of the motors as they are from quite old toys (about 1.5 years old). So the main problem is that the DC motors need a little manual rotation to make it start rotating again and it has a tendency to stop especially when the direction of the motor is made to change according to the code which designed. Also when I used another code (speed regulation via PWM signals) the motor didn't start rotating .It just produced a 'whir' sound and require the initial manual rotation. Iam using a 9V supply to drive the motors via the h-bridge. A single motor runs more faster as if it gets more voltage or power than when I connected two motors to the h-bridge. Can somebody help me with these problems?
I don't know about the specifications of the motors as they are from quite old toys (about 1.5 years old). So the main problem is that the DC motors need a little manual rotation to make it start rotating again and it has a tendency to stop especially when the direction of the motor is made to change according to the code which designed. Also when I used another code (speed regulation via PWM signals) the motor didn't start rotating .It just produced a 'whir' sound and require the initial manual rotation. Iam using a 9V supply to drive the motors via the h-bridge. A single motor runs more faster as if it gets more voltage or power than when I connected two motors to the h-bridge. Can somebody help me with these problems?