Reply to "Reducing brightness of a billboard display"

Dale HOGR Forum Member

To use a resistor you need the bulb wattage and have to calculate size and wattage of the resistor used. I dim with diodes,use appropriate amperage diodes. A single string in one direction will drop voltage on DC. Described here for AC again you only need a single string and not paired diodes. each diode in series will drop about .6 volts.

http://www.jcstudiosinc.com/Bl...d=413&categoryId=426

Dale H

1/19/126:42 PM

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