Hey,
I'm looking for a little bit of help here...any input is greatly appreciated.
I'm attempting to build programmable PWM motor controller using a pic16f690 and an LMD18200. I've programmed a set of instructions I'd like the motor to follow in the pic and the LMD18200 drives the motor. I have a momentary switch connected to an input pin on the pic. The program is set to loop infinitely and blink an LED until the switch is pressed. Then the program runs (it moves the motor back and forth a few times and then returns to the blinking "wait" mode)
I built the circuit shown in the link below (without the switch shown). Everything works fine with a small case fan connected to the circuit and the voltages behave as expected with no load however when I connect a motor that draws a significant amount of current (1A) the circuit stops working ( I believe I am well within the specs of the motor driver and power supply).
When there is a larger motor attached, the circuit just resets. ie the motor moves slightly and then the program goes back to the blinking LED without completing the preprogrammed tasks.
I thought adding a cap across the pic power pins would help but still the same problem (3300 microfarad).
Hope that is enough info to get some ideas. If not feel free to ask questions about missing details.
Thanks in advance
Replace the ** in the link with tt
**broken link removed**