Quote:
Originally Posted by nick
Hi All,
After looking at my graham farish coaches i am contemplating lighting them, although LED bulbs are too bright and gow generate heat.
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There's no easy way of dimming LEDs. Fitting a resistor in series to an LED doesn't really work as they're semiconductors and don't follow Ohm's law. You could "daisy chain" them in series with a current limiting resistor to keep it to about 15mA, remembering that there is a voltage drop of 0.7 Volts across each LED.
The simplest soultion might be to put a filter round them or even paint them to reduce the light output. Also Maplin does a wide range of LEDs with different levels of output, so you might find a less bright one.
And why are you worried about short circuits ?
HTH,
Foggy.