I have a project that utilizes two strong digital, coreless servo motors. Whenever I use DC motors, I usually need to have separate power sources for both the microcontroller and the motors (due to noise and such). I don't have as much experience with servos, is this still the case? I'd really like to get away with using just one battery, are there any precautions I can take for this?
Thanks.
Answer
Wherever possibe use a seperate power supply. (We do in a 4kg robot)
Use a proper noise filter if you must share a power source. An isolated DC-DC converter to supply the electronics is very effective (active filter).
Opto-isolate from the MCU to servo power amplifier.
It's the rule in industrial, where reliability matters.
Never share grounds.
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