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From: jeffw@tekecs.UUCP (Jeff Winslow)
Newsgroups: net.analog
Subject: Re: Any 555 mavens or PUT weenies out there?
Message-ID: <5242@tekecs.UUCP>
Date: Sun, 14-Apr-85 14:19:39 EST
Article-I.D.: tekecs.5242
Posted: Sun Apr 14 14:19:39 1985
Date-Received: Tue, 16-Apr-85 00:39:18 EST
Distribution: net
Organization: Tektronix, Wilsonville OR
Lines: 12

I tried to mail this, and it got stopped somewhere, so I'll go this way...

Assuming you only need 10 mA or so, your circuit ought to work, except that
you will need a coupling capacitor between the 555 output and the transformer,
otherwise the DC component in the driving waveform will saturate the
transformer core. And why don't you try driving the xformer at 20kHz. It's
true it's probably not very efficient there (core losses will be higher and
leakage inductance will reduce output voltage somewhat), but at these power
levels, that won't matter much, and I would think it would be worth it not
to have to listen to the whine.

				Jeff Winslow