Hi again,
Oh ok sure, not a problem
I just wanted to make sure we all were talking about the same thing so that
the correct driver could be chosen. It doesnt work to use a bipolar driver
on a unipolar motor unless that motor has two separate coils, not connected
by a common lead like this one does.
BTW AlainB:
I dont think you can use the freewheeling diodes that way because when one side of
the coil is pulled to ground via a transistor collector the other side goes to +24v, which
is two times the supply voltage. This will cause a huge current to flow.
The freewheeling diodes for this circuit would have to go to ground, with cathode on
the outputs of the darlington array and anode to ground.
Perhaps they make an array that is built with the diodes the other way.