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TRAFFIC LIGHTS

Discussion in 'Electrics UK' started by Bahco, 27 Sep 2008.

  1. tim west

    tim west

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    what version croc clips? crocodile technology 3d 6.10?
     
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  3. breezer

    breezer

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    why make it so complicated?

    everyone is suggesting get this or get that and use leds or pygmy lamps all a waste of time.

    pygmy lamps and leds wont be bright enough, (unless you have the 1w luxeon leds but they cost £££££

    connect a triac to the output of the vellerman kit and get it to switch mains

    triac the first one.

    but whats wrong with relays as i suggested in the first place?

    I have a triac drawing in the shed, but i am not getting it just now, but the cetre connection is the one that switches.

    But triacs need heat sinks, relays don't
     
  4. plugwash

    plugwash

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    I would not mess with bare triacs unless you know exactly what you are doing, remember a bare triac does not provide any isolation!
     
  5. Spark123

    Spark123

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    CC Version 3
     
  6. mattylad

    mattylad

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    A 5 year old's plaything and people are suggesting that it be mains powered!!!

    IMO it would be much better to build something that runs off of a 9v battery.

    I.E. this here as RF may be building.

    It's not hard to take that board, replace the LED's with transistors that in turn, turn on/off relays (including back EMF diodes) if you want it to turn on/off higher power lamps. but IMO they should still be battery powered.
     
  7. electronicsuk

    electronicsuk

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    How do you figure? A single LED wont be all that bright, but you can easily create an array of them, as seen in some real traffic lights. The bonus is that it can easily be run from a small 12v battery, so it's pretty safe for kids to play with.
     
  8. mattylad

    mattylad

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    What precisely are you planning on the child doing with it?

    Why not just buy a set of these.

    [​IMG]

    They work the same & are under £15
     
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  10. breezer

    breezer

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    i was only suggesting mains becuse its what the new lights lamps are.
    my origonal suggestion was usining mains to power a tramsformer that runs the timer and runs the lights. the fact that its meant for a child does not count becuse the child does not play with the actaul lights, but goes or stops when the lights say, and my idea as i just said runs on a transformer which could be out of the way anyway.

    i only mentioned triacs becuse of the new set of mains lights offered.
     
  11. Bahco

    Bahco

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    Thanks to Kablamar I have one happy little boy. :D

     
  12. breezer

    breezer

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    and how do you control them?
     
  13. Bahco

    Bahco

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    They are plugged into the mains at the mo with a 3 gang switch and RCD protected.

    Open to advice on powering it via battery though.
     
  14. big-all

    big-all

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    ok havent read all 5 pages so appoligies if suggested before

    a simple 3 position switch l e ds 12v input top one set red other green mid both yellow[amber] bottom position reverse r/greens

    dead simple no cross wiring/or relays child operates
     
  15. breezer

    breezer

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    my first idea will run on batteries since it is 12v


    LEDS are TBH out of the question, because they are too dim, yes you can get superbright leds, but they will cost a small fortune when you add up the number needed.

    only thing i would say is 20w halogen lamps, but then you are going to need a car battery

    (mine was designed so the lights are not lit by sunshine, so can have small lamps)
     
  16. DIYnot Local

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