[sdiy] 12VDC to 12VAC converter [OT]

Bob Weigel sounddoctorin at imt.net
Mon Sep 3 23:17:19 CEST 2007

Hmm.  I'd say..you can get really small inverters super cheap now.  Just 
plug a 12VDC adapter into one :-).  Not the most power efficient way 
maybe but probably the most economical if your time is worth anything. 
Oops...does it have to be 50hz?  Well you can probably find a cheap 50hz 
inverter too..never shopped for those.  -Bob

Seb Francis wrote:

> Hi,
> Apologies for this OT post but hopefully someone on the list can save 
> me a lot of searching ...
> I need to produce a 12VAC 20VA 50Hz supply from a 12VDC input.  It's 
> to run a 12VAC motor from a car battery, so the AC voltage doesn't 
> have to be particularly sine-like or regulated.
> Any ideas of a simple circuit or IC that will do this with reasonable 
> efficiency?  I thought about a 555 timer with power transistor to 
> boost the output but not sure a square wave will be good for the motor 
> ...
> TIA,
> Seb
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