Atlas constant lighting question

Atlas constant lighting question

Post by Richard Gett » Sat, 24 Apr 1999 04:00:00



I just finished a six diode constant intensity directional lighting
circuit for an Atlas S-4.  The cab light needed to be lit up, and I
figured I could make it work better than my Bachman 70 tonners if it was
constant intensity. That part works fine, but  I hoped that by leaving
the original headlight in as an extra "ballast" the lights would turn on
before the engine moved, but the motor is too good for that, I guess.

Is there a way to use a resistor in the circuit somewhere to get the
lights on before the motor turns?

 
 
 

Atlas constant lighting question

Post by Robert C. Schwart » Sun, 25 Apr 1999 04:00:00


I did a constant intensity approach for an Atlas S-1. I used the new, high
intensity, white T-1 LEDs and found that I could use 4 diodes in series
across the LED and then use the Atlas motor as ballast. The light stays on
at a low enough voltage that the engine doesn't move.

For directional lights just put together another string of 4 diodes and a
LED and connect them in the opposite direction.

Good luck,

Bob Schwartz



Quote:
> I just finished a six diode constant intensity directional lighting
> circuit for an Atlas S-4.  The cab light needed to be lit up, and I
> figured I could make it work better than my Bachman 70 tonners if it was
> constant intensity. That part works fine, but  I hoped that by leaving
> the original headlight in as an extra "ballast" the lights would turn on
> before the engine moved, but the motor is too good for that, I guess.

> Is there a way to use a resistor in the circuit somewhere to get the
> lights on before the motor turns?