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