No hate to say EFA was right.
1 diode you have half a sinusoidal, which mean the average output of the is about 6V
4 diode you have an rectified voltage which varies from 0V to +12V, the average output will be about 10V because of some ripple
a recifier is 4 diodes
Edited by - jackb_ms on 8 Dec 2005 22:12:03