I'm using a skid steer design for my two motor robot with wheels. I got some new motors , but changing the pwm does not seem to change the shaft speed of the motors; therefore the robot does not turn. Actually I should say that it turns very slowly. Almost so slowly that you can't tell it's turning. I'm using a mosfet for each wheel, and the motors have a separate 5v power supply (rechargeable aa batteries).
I'm not using H bridges. Just using a mosfet for each motor so it goes forward only. Also, using pwm to change direction worked fine with the old motors. The new motors are slightly different.
yes, that makes sense for a lot of things now! Is there a work around from a coding standpoint without the H-bridges? Unfortunately I already had a few PCB's made.
TeslaIaint:
yes, that makes sense for a lot of things now! Is there a work around from a coding standpoint without the H-bridges? Unfortunately I already had a few PCB's made.
No, you have no braking in the circuit. You need at least 1/2 H-bridge circuit for active braking.