Re: Wiring Accessory Lamps to the DCC Bus
Vollrath, Don <dvollrath@...>
You can use DCC power to operated incandescent bulbs, but the voltage rating needs to be 14-16 volts, not 12. Otherwise they will be extra bright and not last very long. An alternative would be to add a resistor or a couple of back-back diodes (~0.7to 1V drop in either direction of current) in series with the bulb to lower the actual voltage reaching a 12V rated bulb. A different method would be to use a single diode in series with the bulb to cut the average voltage down to ~7 Vdc. If you do this, be sure to alternate the connected polarity on multiple loads so as to even out + and – current load on the booster.
Yes, you can also use DCC track power to run LEDs, but be sure to use a diode to protect the LED from reverse voltage and a resistor to limit the current. LED loads are so small in milliamps that I wouldn’t worry about half-wave loads on the booster.
From: WiringForDCC@... [mailto:WiringForDCC@...]
Sent: Monday, September 15, 2014 5:38 AM
Subject: RE: [WiringForDCC] Wiring Accessory Lamps to the DCC Bus
Is it as simple as just wiring the 12 volt incandescent bulbs to the DCC bus and adding the proper resistors to the LEDs?