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10.11 Wiring of unipolar stepper motor

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10.12 Resistance reading from leads of unipolar stepper motor

Figure 10.12 shows how the resistance of the motor we are using
looks. There is a 13-ohm resistance between the center tap wire
and each end lead, and 26 ohms between the two end leads. The
resistance reading from wires originating from separate coils will
show an infinitely high resistance (no connection). For instance,
this would be the case when reading the resistance between the
blue and brown leads. Armed with this information, you can wire
it properly into a circuit.

First test circuit and program
After you are finished constructing the test circuit, program the
PIC with the following BASIC program. The program is kept small
Team LRN
Chapter ten