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In addition to what Bens said, what does your electronics that is buggy look like (noise suppression wise)?You also want a voltage regulator with a few .1uF ceramic caps both before and after it.If this still doesn't work, I suspect you are having a brownout problem, meaning when motors run the voltage drops below what your electronics are meant for (even if for a split second). This means that your power supply isn't supplying enough current, and/or your starting voltage is a bit too low. You can try putting a big cap (3000uF+) across your battery terminals if you want.And worst case, just use a separate power supply for the motors (with common ground!).
what if the motors are rated at 12v and are being supplied 12v, and the curcitry is 5v. would you still make teh ground common? and would it affect it?
Now your MCU sends 0V to your motor driver, but your motor driver thinks its -5V and it fries.
k. so all ground even diferent voltages are connected.
so at 8.4V, its less than 1 amp of stall current. I'm using rechargeable NiMH 2/3A batteries, which should be good for 15 amp continuous drain
The kind of noise I am getting seems to interfere with sensor readings and PWM signals . . . The motors kind of "glitch" when they run (it isn't smooth) and the one servo I have twitches a lot when the motors begin running . . .It isn't browning out constantly because I have a 2 second delay on startup which I don't observe very often, but it does sometimes reset.
I have tried twisting the motor wires and using both 1uF and .01uF. Will .1uF be much better? I've found that the .01uF is slightly better than the 1uF. Also, I have 3 capacitors on each motor, but plugged in on the breadboard near the h-bridges. Will it affect it that much if i solder them on to the motors directly?