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Originally Posted by Groth
AC voltages expressed as the RMS (root-mean-square) of the sine wave. The peak to peak voltage is sqrt(2) times higher -- 33.9 V in your case. And since only two of the four diodes in a bridge rectifier are active at once, you'll have an output of around 32.5 volts.
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No, you'll have around 22V, however it will have a huge amount of ripple. To get 30+V you need to add smoothing capacitors, which will smooth the voltage out at around the peak value. TECs tend to run better on smooth power supplies than rippling power supplies (though a lot of ripple won't damage them, you just get poor performance).
BTW thezfunk, how did you come up with an 8V drop off 4 diodes with 0.707V voltage drop?
