[HomeBrew] Inverter

[n_griggs at bellsouth.net]

Most cell phone chargers and laptop supplies are switching supplies like in a desktop computer supply.  No input transformer - the input is rectified and sometimes doubled or tripled then sent  to a switching circuit and transformer.  They don't care if the input is sine, triangle or square wave since there is no input transformer.

> 
> From: john.brewer at us.schneider-electric.com
> Date: 2005/12/06 Tue AM 09:02:42 EST
> To: homebrew at mailman.qth.net
> Subject: [HomeBrew] Inverter
> 
> ** Please do NOT cross-post messages when posting to HOMEBREW **
> 
> 
> Sorry your TV died!  I would expect that the primary of power supply transformer would act much
> like the filter you mention you're looking for. Would be interesting to look at the secondary
> and see if there's any transients propagated through the transformer under load.  I've used a
> number of these things to power low power equipment (laptop, cell phone chargers, etc) with no
> problems.  I know the unloaded output of these things looks pretty awful!
> 
> John
> 
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