A 12V *AC* power supply

[Nadav Har'El]

On Wed, Jul 14, 2010, Shachar Shemesh wrote about "Re: A 12V *AC* power supply":
> I checked the output signal after removing all of the above (resistor 
> included), and a volt meter and an oscilloscope  both shows exactly what 
> I was hoping to see - an AC line giving the correct voltage. The only 
> problem is that I'm not sure whether it was correct to remove the resistor.

My guess (it's been ages since I dabbled in electronics...), is that the
resistor is there to prevent the destruction of the power supply in case
in a short circuit in its load. In other words, it gives an upper limit
to the current that you can draw out of the power supply.

But I may be wrong...


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Nadav Har'El                        |        Wednesday, Jul 14 2010, 3 Av 5770
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