I have been designing a robotic arm with 5 servomotors.
I have been testing each one separately and when I feed the motor via arduino board It works perfectly.
If I feed the motor via protoboard with the power of arduino board, some of them start behaveing bad.
If I feed the motors via protoboard with external power supply of 3 doble A batteries it happens the same, bad behaviors .
What could be the solution?
Is there any external power supply of 5V that can give me the same amperage of arduino or higher?
Thankyou in advance