Sorry Henry, just to answer your question I do think the
F877 is an *excellent* chip to run a small robot. I bought
a few just for that purpose. If you post a specific question
re the robot you are building I'm sure that either I can help,
or the really smart PIC people here can help.

I think many people here are pretty comfortable with making
our PICs do whatever we want so the topics turn to the things
we attach to our PICs, hope that makes sense. :o)
-Roman




Henry Low wrote:
>
> hey guys, I tot this was suppose to be a thread abt the PIC16F877?? hahahah
> It's ok though, just that I always thought that help is coming until I read
> the full mail.....
>
> ----- Original Message -----
> From: "Roman Black" <fastvid@EZY.NET.AU>

> > Hi Duane, do you have a solution for this? I often need
> > high power drivers and usually design from scratch.
> >
> > The main problem with high power h-bridge chips is the
> > barbaric saturation voltages. They try and sell a chip
> > as a 2amp h-bridge when it has 4v saturation at 1A!!
> > This disgusts me, I build h-bridges from junk bipolar
> > transistors I find lying around, with 0.2v sat per device
> > even that is only 0.4v total saturation. It's disgusting
> > that a high-tech h-bridge chip has 10 times worse
> > performance than something I built from junk.
> >
> > Now if you can tell me about a 2A to 10A h-bridge with
> > good sat voltage I would be *very* happy!! I have been
> > looking for something like this for a long time. :o)
> > -Roman

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