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Traffic light sequence using breadboard

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Uploaded by on Nov 26, 2007

For my AS Level electronics project I have used some CMOS logic chips and arranged to produce a traffic light sequence.

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Education

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Uploader Comments (Orrsome1967)

  • Where's the light for the other street?

  • This was a prototype. Since then I built up the circuit to include the other street and a pedestrian light sequence. This used up a lot more breadboard. I have a video clip of the finished circuit which I shall post soon.

  • why dident you use a 555 with a 4017 and a few transistors

  • Hi David,

    The finished project used 2 555 timers and a number of logic gates. The reason for me not using the 4017 was because of my project relied heavily on combinational logic, and that meant using a variety of gates and inputs. The finished project had a pedestrian sequence and two clock inputs. The clock speed would go faster when the light sequence was required to go to all routes at red for the pedestrian sequence. I'll post the finished project video onto Youtube soon.

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All Comments (7)

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  • do you have a circuit diagram of this one? is the concept of 1face traffic light is thesame with the four faces?

  • hi orrsome1967......

    well could u please send me the circuit diagram so that see your logic.....

    since am having a project relating logic design.

    if u could also send me the state diagrams, state tables, and the possbile k-maps.....

    i would be grateful to u

  • AS level electronics.....jeez, standards have dropped vastly!

    I did this sort of stuff in GCSE electronics!

  • very nice i thought it would be along the lines of that. i have a suggestion....... for the pedestrian sequence. in some cities once you press the button and all lights go red there is a timer that shows how many seconds you have to cross. if you could do that it would be super accurate

  • watata pow meing nyo kaw merkoko sasap or egeg ngo ngo wakaka pepemukmuk yake buts tit muning watata?

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