hello,

i have made some xyz motion controlled machines
with old stepper motors

now i would try to do it with dc brush motors with encoder feedback for
position

i build the h bridge example from bob blick http://www.bobblick.com
had some problems in the begining because i had used 2n2222a
transistors instead of pn2222a
now i have inserted the 2n222a in a strange way
so the pinning matched
it workes nice up to 10 vdc
above the 10 vdc the 2n2222a will heat up

my question is:
does anyone now off a similar project on the web
for pwm controlled dc brush motor with position encoder feed back
to replace the steppers in my xyz table

using one or multiple pic 16c/f84 ic's

i now microchip has an example
but that is using a pld and a microchip that i have no programmer for

and i know jr kerr has some commercial product

but i would like to waste some time as a hobbyist to reinvent the wheel

thank's in advance!

luberth

http://home.wxs.nl/~luberth/plotter/plotter.htm