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From: grege@gold.GVG.TEK.COM (Gregory Ebert)
Newsgroups: sci.electronics
Subject: Re: low-current power supplies
Message-ID: <806@gold.GVG.TEK.COM>
Date: 23 Feb 90 20:55:21 GMT
References: <2588@scorn.sco.COM>
Distribution: usa
Organization: Grass Valley Group, Grass Valley, CA
Lines: 18


	I once made a low-power supply by making a transformer which
	was placed in SERIES with an AC load which was active while
	I needed the power.

	You need to make about 20-30 turns of appropriately gauged
	wire (to handle the AC loads current) on a metal object (a
	1/2"x4" bolt is good. Then wind a few hundred turns of #30
	(or smaller) wire on the core. Hook-up your load, with the
	'x-former' in series, and use a meter to measure the output
	voltage. Hopefully, you will have 'extra'. If so, start
	unwinding until you are about 10% over. Your low-power
	load will 'bog-down' some of the remainder. You may have to
	iterate a bit.

	Hope this helps.....

	Oh, by the way, this won't zap, sizzle, or fry !!!