555, Traffic Lights Circuit Help!

Discussion in 'General Electronics' started by marcjhune22, Feb 15, 2013.

  1. marcjhune22

    marcjhune22 New Member

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    Hi, our professor gave us this schematic http://www.555-timer-circuits.com/traffic-lights.html to be our project. I've tried it on breadboard and I can't make it work. The green led turns on for about 8-9 seconds then the orange one for 2-3 seconds, after that the red led wont turn on. Any idea? Kinda need your help right now. Thanks in advanced

    problem fixed
  2. gilson

    gilson New Member

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    hi. can anybody help me in constructing a 4-way traffic light with countdown timer. even only using a single digit, (9,8,7,6,5....0)
    please help. thanks in advance. i have search 4 way traffic light circuits. but it only uses 555 timer, with no countdown timer. thanks..
  3. mark louie liwanag

    mark louie liwanag New Member

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    how to make a traffic light that will take a time about 30 seconds or 1 minute
  4. marcjhune22

    marcjhune22 New Member

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    just change the value of the 2 capacitors (lower value gives faster intervals while higher value lenghtens the intervals, if i remembered it right there is a formula to know the interval of each light. Just search i on google.
  5. marcjhune22

    marcjhune22 New Member

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    I wish i could help but i have no idea with that, I'm just a 3rd year ECE student.
  6. brett

    brett New Member

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    Does anyone know how to extend the duration of the yellow light.
  7. learner

    learner New Member

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    i have tried making the traffic lights circuit but it is not workin properly.Only the blue light is glowing.Can anyone help me fix this problem as i hv submit my project soon.
  8. Alex

    Alex New Member

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    I'm not in a class but would like someone to please tell me how to make the circuit.? I may be able to use it in model railroading. Thank you.
  9. marcjhune22

    marcjhune22 New Member

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    maybe you have connected the intercting lines, it is not connected.
  10. marcjhune22

    marcjhune22 New Member

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    just follow the diagram
  11. marcjhune22

    marcjhune22 New Member

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    i have extended the yellow light for about 10-15 secs. just use a 9v battery as a supply not a rectified supply.
  12. Atik02656

    Atik02656 New Member

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    You can see this vedio .........
  13. Justin

    Justin Member

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    Location:
    Spuce Grove

    I don't know if you noticed or not but this thread hasn't been touched in months. Besides that, thanks for posting the video in case other people have the same issue.
  14. Vience Collin Bernardino

    Vience Collin Bernardino New Member

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    will this circuit work, with just the 555 timer only? and even without the
    4017B IC