Re: 9VAC from 5VDC?

From: Jim Brain <>
Date: Fri, 13 Sep 2013 23:30:59 -0500
Message-ID: <>
On 9/13/2013 10:58 PM, Bil Herd wrote:
> With enough inductance you can use a square wave and the inductance will
> round it out.  I typically use a center  tap transformer on the primary
> with VCC to the center, then grounding one side then the other gets the
> polarity reversal. I have used TIP120s (Darlington) and 2N3055s for the
> transistors.
That's fine, but I do think I can provide a pretty nice sine wave 
approximation to the transformer.  Either way, my sticking point is the 
transformer selection.  Any links to a suitable offering?

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Received on 2013-09-14 05:00:07

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