Reply to "AC to DC conversion"

NortonOGR Forum Member

@AmFlyer posted:
Ray, that is what GRJ posted above. 18VAC RMS into a full wave bridge outputs about 17VDC. There is about a 1V drop across the diodes. If we add capacitors to smooth the waveform it basically makes the output DC voltage equal to the peak voltage input rather than the RMS voltage. For a sine wave, peak is 1.414 times the RMS voltage, hence GRJ's 25 to 26 VDC.
There are two choices, add an adjustable voltage regulator or set the input (track) voltage to 13VAC. The problem I have found with 13VAC on the track is the electrcouplers on the Legacy engines do not reliably fire.

We’re talking Blunami, no? 13v RMS on the track will fire a coupler if you apply it directly to the coupler via a relay. Legacy boards don’t use track power directly to the coupler.

Pete

9/28/237:54 PM

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