> At such a high voltage drop ratio, you'd normally be looking at a switching
> power supply.  At 35V in 86% of the input power is wasted as heat which then
> has to be gotten rid of.

When 35V was the 'normal' input I would not be looking for a 35V spec'd 
regulator!

In this case power is no problem (either a 24V supply or an wheelchair 
accu). The current is only 30 mA anyway, so at 24V some 0.6W is dissipated.

-- 

Wouter van Ooijen

-- -------------------------------------------
Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu

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