Hey everyone, I recently built an H-bridge with four darlington pairs being fed by PWM from a pic. I have two questions/concerns:
1.) Is it possible to run both an H-bridge and a motor from the same power source without significant interference on the logic side? I'd like to run the h-bridge at 12v, then use a voltage regulator to supply 5v to the PIC. Can a regulator provide clean and stable enough power from the noisy h-bridge circuit?
2.) I built an LM317 based bench power supply to use for projects like this. However, when I use it to supply motors the performance of the motor degrades over the first minute or so and often stops. Can LM317 based power supplies be used for small motors? I also notice it sometimes acts funny when supply circuits with large capacitors.
The LM317 is kept very cool (large heatsink with fan) and the motor doesn't draw more than 1 amp.
Right now I am running my motor with a 9v battery and it works better than the PSU.
1.) Is it possible to run both an H-bridge and a motor from the same power source without significant interference on the logic side? I'd like to run the h-bridge at 12v, then use a voltage regulator to supply 5v to the PIC. Can a regulator provide clean and stable enough power from the noisy h-bridge circuit?
2.) I built an LM317 based bench power supply to use for projects like this. However, when I use it to supply motors the performance of the motor degrades over the first minute or so and often stops. Can LM317 based power supplies be used for small motors? I also notice it sometimes acts funny when supply circuits with large capacitors.
The LM317 is kept very cool (large heatsink with fan) and the motor doesn't draw more than 1 amp.
Right now I am running my motor with a 9v battery and it works better than the PSU.