Quote:
Originally Posted by zeropointbug
Wait, isn't Sine = 0.7x something, so how do you get more than the average voltage when rectified and filtered? Shouldn't the voltage be pretty close to the AC voltage? Or am I missing some current formula that has to be factored in?
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Transformers are rated in RMS voltage. But when you rectify and filter them, you get the peak value. 40v AC rms = 56.5v DC (with some ripple depending on capacitance used and current load). Minus around 1.4v for the bridge rectifier diodes gets you around 54v. Oh, and do use a bridge rectifier because instead of the 60Hz ripple, you actually get 120Hz which is easier to filter.
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