13. [ ] Apply only the +5 volt power again, verify the power LED lights and nothing gets hot. 14. [ ] Power off, connect motor power (but don't turn it on!) and the motor. For help with sorting out the motor leads, see: Stepper...
Install the small ceramic monolithic capacitors first. The orientation of these ceramic capacitors does not matter. They are coded with a numeric code that reads like resistor colour code, but in pico-farads (pF): 104 = 100 000 pF, labelled as 100 nF...