Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!sol.ctr.columbia.edu!bronze!commgrp@silver.ucs.indiana.edu From: commgrp@silver.ucs.indiana.edu (BACS Data Communications Group) Newsgroups: sci.electronics Subject: Re: 12VDC --> 110VAC ? Message-ID: <1991Mar6.184053.2368@bronze.ucs.indiana.edu> Date: 6 Mar 91 18:40:53 GMT Sender: Organization: Indiana University Lines: 22 lsls00@iliad.kodak.com (Ilia Levi) writes: >...Does anybody know of any circuits for a 12VDC to 110VAC >converters? If they were published in any magazines? >I am sure that by the time I'll get a reply, the emergency will be over, >but it's always good to be prepared for the next time. > >Thanks, Ilia levi@kodak.com See _Radio Electronics_, April 1991, p.43. (I got my subscription copy 2 days ago; should be on newsstands soon.) This interesting design has "modified sine-wave" output (actually, 4-step square wave), uses paralleled power FETs to drive a conventional 12-volt filament transformer in reverse. It's regulated by feedback from the output. It runs at 75 instead of 60 Hz to avoid saturating the transformer; the frequency won't matter in most applications. It's only 40 watts but could probably be scaled up by using more FETs and a bigger transformer. Most or all of the parts are available from Radio S***. -- Frank Reid reid@ucs.indiana.edu