I am controlling a large number of servo motors from a couple of arduino boards, and am interested in powering the motors from a separate source other than the Arduino’s 5V so I can have a lot of them operating without drawing too much current and lessening the power to each motor. The arduino still send the control (pulse) signal to the motors.
The problem I am having is that when I test separate power source to a servo motor (a power supply w/5V voltage regular) on a bread board and plug the control into the Arduino, the voltage regulator gets VERY hot (like, something is wrong hot). I’ve added a few capacitors, and it doesn’t fix the problem.
Do the control and power source for a servo motor have to be from the same source?
Is this an issue with the external servo power source is adding a continuous 5V to the pulse signal (which i assume is pulsing voltage) and this is causing it to overload?
Is there a way around this, or do the motors have to have both power and control signals from the Arduino?