Gary said:
I just posted another battery charger with minimum parts count. Both
current and voltage regulated, but it is a Non-Isolated design. Can
be useful in some applications.
If interested, go to:
http://www3.telus.net/chemelec/Projects/Projects.htm
Yeah, right. "Take care", and you have a project that can be deadly.
I have a gizmo that's very similar to your circuit, that looks like the
plug on the end of a power cord, minus the power cord. On one end there
are the two brass prongs, and on the other end there are the standard
snap-on clips for a 9V battery. This device was imported from Japan in
the '60s, and was made for charging these batteries. It was downright
dangerous, and you won't find such devices nowadays because they _are_
dangerous. If you build one of these circuits, you should enclose the
battery under a lid with an interlock switch to shut it off when the lid
is opened, so that someone can't touch the contacts when it's live.
BTW, the 470 uF (not MFD) capacitor is of little use in this circuit.
The battery dowsn't need filtered DC, and the cap can't charge up to
more than the zener voltage.
--
----------------(from OED Mini-Dictionary)-----------------
PUNCTUATION - Apostrophe
Incorrect uses: (i) the apostrophe must not be used with a plural
where there is no possessive sense, as in ~tea's are served here~;
(ii) there is no such word as ~her's, our's, their's, your's~.
Confusions: it's = it is or it has (not 'belonging to it'); correct
uses are ~it's here~ (= it is here); ~it's gone~ (= it has gone);
but ~the dog wagged its tail~ (no apostrophe).
----------------(For the Apostrophe challenged)----------------
From a fully deputized officer of the Apostrophe Police!
<<Spammers use Weapons of Mass Distraction!>>
I bought some batteries, but they weren't included,
so I had to buy them again.
-- Steven Wright
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(Problem) Evidence of leak on right main landing gear
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