> *BUT* battery suppliers and all who talk at any length about their
> maintenance make a big deal about the float voltage being correct to
> something around +/-0.1 Volt. I really don't want to have to trim this
> manually during setup (pot/labour/training/Murphy). And the eg LM317
> spec sheet guarantees that you can't get anywhere near the required
> specs without adjustment.

How close would you get with a 7805, a zener diode in the GND leg, and a  
series diode to prevent current drain from battery when charging power is 
off? Pretty cheap. More accurate than resistor divider. 

I have done this before and seem to remember it working ok'ish, but I don't 
remember the details and can't find my schematics right now!

-- 
Brent Brown, Electronic Design Solutions
16 English Street, Hamilton 2001, New Zealand
Ph: +64 7 849 0069
Fax: +64 7 849 0071
Cell/txt: 027 433 4069
eMail:  brent.brown@clear.net.nz


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