DC Directional Lighting

Discussion in 'DC Control' started by Kerry Viney, Sep 24, 2018.

  1. Kerry Viney

    Kerry Viney Full Member

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    Where do I find a kit or circuit board for DC directional lighting using bi coloured LEDs. I would like to fit into a loco and also a Class 117 DMU
    Kerry
     
  2. paul_l

    paul_l Staff Member Administrator

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    Hi Kerry

    The problem with Bi-Colour LED's is they tend to be Red / Green, or Green / Yellow, some will give yellow by illuminating the green and red together to give yellow.

    Another solution would be to use optical fibre in the lamp sockets running back to a light box - simply a box with the fibres running into it with two led's 1 red and 1 warm white.

    upload_2018-9-24_22-17-2.png

    Changing the track polarity will change which LED illuminates, the 10K resistor dimms the LED and limits the current.

    Paul
     
  3. York Paul

    York Paul Full Member

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  4. Kerry Viney

    Kerry Viney Full Member

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    Thanks for the replies. I do have the 3 leg bicolor leds like DCC Concepts, but mine came from France some time ago. Will test the circuit next week.
    Kerry in Qld
     
  5. Toto

    Toto Staff Member Founder Administrator

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    What do the manufacturers use to get red and white then ? I want to install lights on my DMU
     
  6. paul_l

    paul_l Staff Member Administrator

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    Some use the fibre optic and light box method, allows for smaller body lamps as well.

    Also the red and white lamps are not always in the same location.

    Using the above circuit, you can have several LED's in the same leg e.g. two Red's in series.

    Paul
     
  7. Toto

    Toto Staff Member Founder Administrator

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    :scratchchin:
     

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