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  1. #1
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    Signal Buffer/booster

    hi every one

    i m trying to design a digital clock. One Master-Clock that will send a serial data at 9600 baud-rate, and slave clocks will receive the data and will display it, for Master-Clock, I used AT89C51 and for Slave-Clock AT89C2051.

    The most near Slave-Clock is approximately 12-15 feet, but the last one is approximately 300 feet far. my idea is to use coaxial-cable, (for common ground and signal)
    ------------------
    Questions?
    1) Will i need any buffer/booster to send data at the last end and receive it perfectly?
    1-i) If Yes, so how can i boost it?

    2) Is Coaxial Cable is good for this purpose

    Thanks

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  2. #2
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    Re: Signal Buffer/booster

    Many companies manufacture RS485 transceivers, symmetrical cable should be used . You can use one circuit like 75176, 26LS32, LTC1685, LTC1484, MAX3483, MAX3362.

    http://cds.linear.com/docs/Datasheet/1685fa.pdf
    http://www.datasheetcatalog.org/data...im/MAX3362.pdf

    read this:
    https://www.edaboard.com/thread126212.html




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