A 12V *AC* power supply

[Erez D]

2010/7/14 Shachar Shemesh <shachar at shemesh.biz>

>  Alon Barzilai wrote:
>
> I seconds that.
> without this resistor the voltage at low currents will go sky high (~20V)
>
> Why would it? The transformator pretty much dictates the maximal power.
>


the transformers wants to supply 12V DC. so  12V is the average voltage AC
power.
to get to 12V average (i.e. RMS) , the peak is 12*sqrt(2).


cheers,
erez

>
>

> the 12V is  usually close to the maximum current.
>
>  I can understand the logic of that statement. However, once I verified
> that the output without load (any load will negate the resistor anyways) is
> the same as the reference power supply I'm trying to mimick, wouldn't that
> mean that I'm okay with things as they are?
>
>
> Shachar
>
> --
> Shachar Shemesh
> Lingnu Open Source Consulting Ltd.http://www.lingnu.com
>
>
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