I have the ULN2803 driver chip connected to the Stepper Motor, and GPIO lines from Pi driving the ULN2803 chip.However, when I turned on the GPIO line to drive the ULN2803 chip, the motor is turning but it causes power drop and lost wlan0, IP address and screen flickered. I then put a 10K resistor on the 5V power line, this time the motor is not turning and no power drop. so what's right way to handle this?
I didn't find the right solution from the internet.
https://www.raspberrypi.org/forums/view ... 63&t=73485
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