[bojan]

Originally Posted by p3nn

Thx Barry. Mine don't have a parallel port. However I went searching for diy pc motor control and came upon the following site which seems quite useful

http://electronics-diy.com/electroni...epper%20Motors

James

James,
This is OK..
However, one day (sooner than you think at this moment) you will want full control over your scope (GoTo, etc).

Bartel's software (which is a full-blown control application for both dobson's and EQ's, with unlimited data base of objects and almost totally configurable for a variety of mechanical designs, supports encoders and interface to star chart programs) does not work via USB (neither does Barry's..).
So, as you are building your stepper interface, try to find a cheap old PC with LPT and two RS232 ports (100MHz is enough for Bartlel's application, probably the same applies to Barry's).