[Lowfer] Great idea for experimenting...

[Bill Ashlock]

>Bill Ashlock wrote:

> > In one battery project that I came across, the author stated that if the
> > potato battery couldn't power a small light bulb or LED, try powering a
> > digital watch. Now that watch is a real power-hungry device!
> >
Ed, I was being sarcastic. My point was that the watch load was too easy as 
a test for battery power. Must have been suggested by the author so he 
wouldn't receive law suites from parents of kids that failed to get enough 
current to power a bulb..... and we just can't allow the kids to fail at 
anything these days because it will ruin their self esteem, right?

I've been thinking about the 10mw of power needed for my setup and it isn't 
as small as I originally thought - at least for a vegetable battery. That's 
ten 1v batteries each supplying a current of 1ma. So that's a total of 10 
maH.

Bill A

>A typical LCD digital watch will run for over a year on a 60 maH silver
>oxide cell.  That works out to a current of around 7 microamps.  Most of
>the watch circuits quit working when the voltage drops below about 1.1,
>so you might need a couple of potatoes in series.  Of course, they'd dry
>up or rot long before the year was up.
>
>Ed
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