help please help!!! i have 4 sg90 servo i powered them with 5.4v a 5.4 v 2a adapter is powering the breadboard. then when i power the servo they dont work. but when i put the sg90 into arduino it works.so i dont understand how should i power the 4 servo. because 2 time the servo got buzzing and damaged
Welcome to the forum
Please post a diagram of your circuit that does not work when you use a breadboard and external power supply
My crystal ball says that when you use a breadboard you do not have a common GND connection between the Arduino and the external power supply
Am I right ?
As long as you power the board separately from the servos, you should be ok. Maybe if you hand-drew the wiring and posted a photo of that, we could see more.
i have a common gnd connection betwwenn the arduino and breadboard previously i powered 4 servo with 4.6v and the servo got damaged now i power with 5v but through breadboard it does not work
I look forward to seeing your circuit when you post it
Your 2A 5V supply may be marginal. To test theory, run one servo in the breadboard setup, and verify it works, then add a second, then a third. If it works in the one-servo but not the 4-servo, it's your supply
That is suspicious. How heavily loaded are your servos? Do you force-move them when unpowered?
Breadboards are for temporary experiments with low power logic circuits, and cannot handle motor currents.
You should use a servo power distribution PCB (DIY stripboard version), or servo driver board like this one.
Yes, but for a test, the OP could at least try it. Granted, that may also be the source of their problems.
Post a picture of the hardware setup.
I think that some people do not understand that the servo needs two circuits to make it work. It needs plus and minus of its power supply circuit and plus and minus for the control circuit. But, the servo only has three wires. The minus (or ground) of both circuits are common at the minus servo wire. So the servo power supply minus has to be connected to the controller minus.
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