I have a simple DC adapter that you plug straight into a wall socket. It has a transformer that brings the voltage from 220VAC to 12VAC, then 4 diodes for the full bridge, and a smoothing capacitor. The problem is that it outputs ~16.8VDC. I have checked the transformer, and it outputs 12VAC as it it is supposed to, I have checked the diodes, and have replaced all 4 of them, still the same thing, i also have replaced the capacitor, but nothing changed. It is a really strage problem for me since the transformer outputs 12VAC without any problem.
Am i missing something here?