HI !
I use a amplifier card connected to the parallel port , you probably can
get cards like that from many places, the one I use is from conrad electronic
(www.conrad.at) . The card is absolutly 0-inteligence, so you write a
coil-1 on/off, coil-2 on/off and curent high/medium/low/off bit pattern to
the parallel port and then toggle a control bit . via parallel port I run
three rt-threads at 2.5kHz each (its only a 486SX/33 doing the job...)
the card itselfe need an external power supply with 12-28V max 2.5A
Card type:
"schritmotor-steuerkarte SMC800" maximum 800mA motor coil curent
"schritmotor-steuerkarte SMC1500" maximum 1500mA motor coild curen
I'm not claiming that these are in any way special or high quality, but they
work for me without any problems, and controling them with rtlinux is trivial.
hofrat
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