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QUOTE (Peter_Harvey @ 19 May 2007, 21:54) <{POST_SNAPBACK}>Well have put the AC in one end and the 12v connection in the other and I have it the write way round when I connect the AC the heat sink on it smokes it only did it once and only for about a second but no output at all I have checked the the circuits and the components and the all check out OK but no output.

I am connecting 16V ac from a Gaugemaster combi controller.

If indeed you have connected up the device correctly then something is definitely wrong here! Are you certain you connected the AC from your gaugemaster to the correct terminals on the unit?
Semiconductor devices are the quickest blowing fuses known to man so I suggest that the regulator is cream crackered!
Also I presume that the LED on the output had the correct current limiting resistor connected in series with it?
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