I'm trying to control my 3v motor from my 5v arduino.
For this i use :
- 5 volt power source from pc for the arduino
- L9110 H-bridge module
- 2 AA Battery as power source for the L9110 H-bridge
however if I touch the h-bridge pin with the 5v source from the arduino (red cable on the image), nothing happens....
Any idea ? if I power the motor directly from the battery, the motor works
Maybe the problem is that I have 2 different power source