I bought the following stepper motor with a ULN2003 based controller module and I am trying to get my head around how the darlingtons in the ULN2003 chip are arranged in a H-bridge for each stepper motor coil.
I have looked at the datasheet (http://cdselectronics.com/kits/uln2003.PDF
It shows the elements in the chip as diodes with 1 input and 1 output.
How do you get a H-bridge from a diode?