On 21 May 01, at 21:49, Bob Ammerman wrote:


> I am really a software guy at heart, so I'd appreciate some hardware guys
> looking at this and telling me how stupid I really am, and to go back to my
> code. :-)
>
   Bob, you can stay on hardware too, it seems ok to my eyes...


> By the way, this particular scheme was chosen to allow the PIC to control
> the high side current source, while keep the battery grounded allowing for
> easy sensing of Vbat during charging.

   However, I don't see the sensing battery circuit, if you don't need
this one, your schematic may be simplified, also the battery may
be measured even if it's floated ( no pin to ground ) using a simple
converter and an optocoupler.
   But light me please ! Why need this charger a microcontroller
inside ? [smile]
Vasile

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