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If these LED traffic lights...

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    If these LED traffic lights...

    are so wonderfully reliable and stuff, why have so many of them got failed sections in them?

    It must say something about the way they've been designed.

    #2
    Originally posted by zeitghost View Post
    are so wonderfully reliable and stuff, why have so many of them got failed sections in them?

    It must say something about the way they've been designed.
    I've noticed that in the ones in buses rear lights and indicators and train and station information boards too.

    Comment


      #3
      I don't like LED traffic lights. They're too "instant"! I "feel" them click on!

      I prefer the old fashioned incandescent globe thingies. Much "warmer".

      Churchill - In "I like traffic lights" mode!

      Comment


        #4
        Originally posted by Churchill View Post
        I don't like LED traffic lights. They're too "instant"!
        I remember making a LED 'traffic light' from Practical Electronics magazine in about 1976.

        They also had a tennis game (Pong!) that I made, which was boring and crap.

        Oh the endless possibilities of 555 timers!

        You've come right out the other side of the forest of irony and ended up in the desert of wrong.

        Comment


          #5
          Originally posted by zeitghost View Post
          are so wonderfully reliable and stuff, why have so many of them got failed sections in them?

          It must say something about the way they've been designed.
          Is the point that if one bulb in an LED one fails you can still see the light while if one bulb fails in the standard type you get no traffic light?

          Comment


            #6
            Originally posted by bogeyman View Post
            They also had a tennis game (Pong!) that I made, which was boring and crap.

            Oh the endless possibilities of 555 timers!
            But getting more than one to run off the same power rail....
            Insanity: repeating the same actions, but expecting different results.
            threadeds website, and here's my blog.

            Comment


              #7
              Originally posted by threaded View Post
              But getting more than one to run off the same power rail....
              Massive capacitors! The only practical solution

              You've come right out the other side of the forest of irony and ended up in the desert of wrong.

              Comment


                #8
                Originally posted by zeitghost
                Chap I worked with made one of those.

                In work.

                We played with it for hours.

                On afternoons & nights mostly.

                It was quite enormous... funny to think that the code fits in a pic...

                I'm sure his version had 741s in it too...
                I built a 16 pole chebychev filter with 741s.

                And it worked first time.

                Which was nice.
                Insanity: repeating the same actions, but expecting different results.
                threadeds website, and here's my blog.

                Comment


                  #9
                  Originally posted by threaded View Post
                  I built a 16 pole chebychev filter with 741s.

                  And it worked first time.

                  Which was nice.
                  Pah!

                  I built PE's Analogue Computer with 741s

                  It was a bit variable, to say the least.

                  Also I couldn't get the right protractors you needed for the input dials.

                  p.s. that would be a 'Chebyshev Filter' then?

                  You've come right out the other side of the forest of irony and ended up in the desert of wrong.

                  Comment


                    #10
                    Originally posted by bogeyman View Post
                    Pah!

                    I built PE's Analogue Computer with 741s

                    It was a bit variable, to say the least.

                    Also I couldn't get the right protractors you needed for the input dials.
                    I had a go at that Formant Synthesizer, that was fun.
                    Insanity: repeating the same actions, but expecting different results.
                    threadeds website, and here's my blog.

                    Comment

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