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Terry, I'd like to have more details about your project. I wonder, wouldn't
be easier if you use a PICMicro MCU? or maybe another controller family?
Tell me more, maybe I can help.
Best Regards,
CarlosLuis Rendon M.
"Terry King" <tking@together.net> wrote in message
news:MPG.180b8240bf4a69d5989682@lugnet.com...
> We need to control larger motors with a separate 12V
> power supply, from the RCX outputs. We would like to
> 'mirror' the RCX bipolar, pulse-width-modulated outputs
> to a separate circuit with a larger H-bridge that is
> (probably) electrically isolated from the RCX.
>
> Can anyone point to an example of doing this? I betcha
> someone has by now, but I didn't find much with my
> Google search...
>
> We can build some external electronics, etc. but don't want
> to reinvent the wheel (driver).
>
> First thoughts are two opposite-connected optoisolators
> with a series resistor to the RCX output. But then, how
> to drive an H-bridge from that??
>
> We need to drive two electric-window motors that are 12V and
> about 5 to 10 amps, for a tracked vehicle.
>
> BTW, any recent sources for TRACKS would be appreciated!
>
> --
> Regards, Terry King ...In The Woods In Vermont
> tking@waitsriver.k12.vt.us
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