I think this is a relatively matter, but somehow I’ve not been able to find this information. Do anyone knows what is the current drawn by the 5V pin in the A4988? I know from the motor it can draw up to 4 amps, but the other 5V pin its not clear.
The reason for this question is that I have connected a an LCD screen which draws 400mA from the power supple (12V, 3 amps). When I connect this LCD in conjuction with a stepper motor, the motor stall initially, and I have to give it a push to start running. My stepper motor operates at a current of 0.95mA, and I’ve set the vref to 0.544 volts (0.068 rs). I am also using an Arduino UNO board, which apparently can draw up to 200mA. I am not sure why would my motor stall with this LCD connected to it.
Any insights would be gladly appreciated