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[arduino] Computer PSU damaged my servos? Answered

Hi guys! I was hoping You could help me with sort of a problem :(
So I bought this Modecom 400W power supply and hooked up 2 servos to molex 5v line and ground. For control signal i used standard arduino uno "example" code. Servos were buzzing for a while but they did not react to commands.
Did I need a power driver for the servos? I think they should draw as much current as they need from the line, shouldn't they?
So beforehand, I connected the motors directly to arduino for power and they worked. Now - nothing ;/ Nothing inside looks damaged (I think)
Anybody had similar problems?

Arduino UNO R3
Tower Pro MG 996R

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liquidhandwash

3 years ago

The power supply needs to be grounded to the arduno so the 5 volt negative from the psu needs to be plugged in to a GND pin on the arduno

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januszknurliquidhandwash

Reply 3 years ago

Oh yes, I haven't known that until a little later on. But is there a way to tell if servos are definitely going to trash?

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liquidhandwashjanuszknur

Reply 3 years ago

Put the servos back to how they were connected when they were working to test them. If your still not sure if it the arduino thats faulty, try a fresh servo, get that working, then test your other servos.