On 7/14/2010 4:18 PM, Shachar Shemesh wrote:
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 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
I guess so.
since you device can handle higher voltages anyway, I do not see any problem.

one more thing you can do, is to open up the 110V transformer and see what inside, my guess is that it have no other component then the real transformer inside, with pa primary coil for 110v and secondary for 12V.
and you replace it with another one when the primary coil is 220V.
BTW, how heavy it is?

Alon


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