I am using a motor similar to this one https://www.indiamart.com/proddetail/dc-motor-small-size-3-to-9v-3000rpm-12388061791.html and I connected it to the arduino like this https://www.instructables.com/DC-Motor-Control-Arduino-Uno-R3/One of two things, there is a very low DC voltage present, not enough to rotate the armature?
The other there is a low AC or ripple content causing the buzz, a DC motor generally is silent or very quiet.
What is the motor,PS, and drive method details?
What do you mean "by hear it working?"
Max.
thank youHere is one hook up.
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