[ATM] USB stepper controller

[Paul Kennedy]

>My solution was to build my own and for a lot of applications, especially>those not related to track & sweep motion control where switching>between microstepping and full stepping occur, I have found great>reliability in a very simple circuit utilizing only 3 ICs: a 555 timer>connected to a 4017 Johnson counter whose output goes to a 4 diode array.>Speed is tuned with a potentiometer and circuit could easily be>computerized. There is probably some simple trick to make this>circuit even do half and microstepping, but for many applications, such>circuits work gret as is. Building my own stepper circuit was the best>advice I ever got, so I now encourage others to do the same.I am not very experienced with electronics but I would like to build a copy of your circuit.  Can I have a set an electrical plan so that I can be sure to wire it correctly?Thanks,Paul KennedyHusband for 16 years, Father of 4, and son.  What else can a man ask for!:^)