The motors are universal 8 wire. I am going to drive them unipolar with a circuit from "Robot Builders Bonanza" 2nd ed.
And... while we're on that...
In all the motor drivers I've seen that use power xsistors the load (motor coil) is on the collector like this:
Code:
_______()_()_()_()__________ V
/ motor coil
|/
---| TIPxxx xsistor
|\
\_____
|
|
|
-----
---
- is there any reason not to put the load in the emitter circuit?
like:
Code:
________________ V
/
|/
---| TIPxxx xsistor
|\
\_____()_()_()_()___
motor coil |
|
-----
---
- yes, there should be a flyback diode in there, and probably a current limiter resistor too, but I'm severely challenged in an ascii art sort of way
.
robotic regards,
Tom