13 Jul
2007
13 Jul
'07
12:26 a.m.
On Wednesday 11 July 2007 16:40, Tony Duell wrote:
Yes, I remember that "nonsense box" (or whatever it was that they called it,
something of that sort) saying that the battery life in there would
essentiallly be the shelf life of the battery, or darn close to it. Several
years, at least. Dunno if I'd want to gang up ten of them, though.
And that 90V
battery was probably the single biggest reason why I never
b= uilt=20
one of those...
Back when I built mine, 90V batteries were still fairly easy to obtain.
Nowadays, I'd probably go to the local 'pound shop' and buy 10 cheap 9V
batteries and link them in series. The current drawn is so low that even
cheap-n-nasty 9V batteries would last quite a time. IMHO it's cheating to use a step-up switching
regulator IC. If you've got
one of those, you can get a 555 timer ;-)
:-)
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, ?a critter that can
be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin