communication on long distances

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  1. - 8th May 2009, 18:15 #1
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    iugmoh
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    Default communication on long distances

    Hi all,
    I need your help and suggestions in this problem:
    I have a robot which have two motors and a car battery, and I control its direction forward, reverse , to right and to left without any problems, but when I use a long wire for control about 300 m there are not anything work, and I test to run motor directly from the car battery throgh the cable (200m) and it's working but very slowly I think the wire is the problem , so how I can control the robot form long distance so I send only the control signals to robot and all circuits and driver and car battery on the robot ?
  2. - 8th May 2009, 20:07 #2
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    mackrackit
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    If you want to stay with wires look into RS422 or use a radio link.
    Dave
    Always wear safety glasses while programming.
  3. - 8th May 2009, 20:14 #3
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    oky I will use rs485 or rs422 but is there any porjects I can find with schematics ?
  4. - 8th May 2009, 22:27 #4
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    Maxum makes a converter chip 232 to 485. I do not remember the part number.

    Once the signal is converted you will use two wires for RX and two wires for TX.
    Dave
    Always wear safety glasses while programming.
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