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Electromechanical bus route sign

Discussion in 'Misc Electronics' started by [email protected], May 19, 2006.

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  1. Guest


    I am trying to track down any information on how electromechanical bus
    route signs work. To start off I am not sure of how they are refered to
    exactly, but what I am thinking of are the route name displays found at
    the front of city buses, that are yellow when 'active' and 'black' when
    flipped. If you have anything that could help me with this I would
    appreciate it.


  2. Guest


    I have some of these readout devices, they came from Ferranti in the
    UK. There are others making this type of display. My units were 7 inch
    character ht, and operate from plus or minus 12 volts. Momentary pulse
    of course, but will stay in the last state actuated.

    I built my signs into a time of day display with six digits, hours,
    minutes & seconds. To drive them required some smarts, an 8051
    microcontroller did the job. Fed the processor with serial data with
    the first part of byte as digit position and second part of byte as
    data. Six words would set it to any time of day dynamically.

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