H546 Unipolar Stepper motor driver
April 3, 2011
Hi, ive been trying to make a steppermotor driver for 2 http://www.active-robots.com/products/motorsandwheels/stepper-motors/datasheets/103h546-0440.pdf
I have used a ULN2003 like this:
(the second motor is in 5, 6, 7, 8 (I have a bigger ic)
Only the first motor works. The other just wobbles back and forth. Does annyone know what I have done wrong?
PS the circuit worked tempromentaly when I breadborded it on 2 seperate ICs. I thorght that the tempromental-nuss was due to a dodgey connection somewhere (which I am plauged with on breadboards)