Hello everyone,
I am designing a simple LSD motor drive and I am having unexpected results. I attached a drawing of the schematic. When I turn on the arduino, the LED turns on and I am not able to modify it with my pot. I am basically taking a reading of pot on an analog pin and modifying the pwm out of pin 5 on an arduino duevmilo (sp?).
So some more details. I am trying to use a PMOS with a PWM to raise the logic level to a 12V PWM signal so I have a low on resistance for the NMOS. The PMOS is pulled up with a 10K resistor on the gate. The PMOS has a 10K resistor to ground that is tied to the gate of the NMOS. This ties the NMOS to ground with a pull down resistor. Do when the PMOS is turned on the 12V signal is PWM'd to the NMOS because it is the path of least resistance. This should result in a PWM control of the motor but like I said, the signal is not working. I am running out the door currently so I haven't had a chance to scope the signal but I will check the signal and voltages by tomorrow and look back at this. Thanks for any help you can give me!