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Connect several wires without relays?

Discussion in 'General Electronics Discussion' started by Antleo, Jul 19, 2017.

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  1. Antleo

    Antleo

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    Sep 6, 2016
    I have a project where i need to control how several wires are routed to each other, i have 4 sets of 3 wires. within each set the wires have to be either connected or no connection between any of the 3. Then when a button is pushed the wires have to connect, or disconnect and possibly connect to another wire in one of the other sets. the only way i can think to do it is relays, but id like to avoid doing this as it will clutter up the board a lot. I am using an arduino for other functions, if theres another chip or if someone has an idea with a better circuit please let me know!

    Thanks!!
     
  2. AnalogKid

    AnalogKid

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    722
    Jun 10, 2015
    If the wires have 100,000 volts at 100 amps, then switching them can be a real problem. If your signals are something different, you might want to share that information.

    ak
     
  3. Antleo

    Antleo

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    Sep 6, 2016
    Valid point, they are 12v at 5amps max
     
  4. ChosunOne

    ChosunOne

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    Jun 20, 2010
    Look up switching transistors, aka solid state switches, aka solid state relays.
     
    73's de Edd likes this.
  5. 73's de Edd

    73's de Edd

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    Aug 21, 2015
    aka solid state relays . . . . . . . .
    But . . . . . initially check for having the proper . . . . . BULGE . . . . . in your full wallet.
     
  6. kellys_eye

    kellys_eye

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    Jun 25, 2010
    Simply - use diodes.

    Sounds very much like an X-Y switching arrangement to me.
     
  7. Antleo

    Antleo

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    Sep 6, 2016
    The relays are exactly what I was trying to avoid..

    The x-y switching arrangement, how would one set this up? I can't seem to find much online for it.
     
  8. kellys_eye

    kellys_eye

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    Jun 25, 2010
    It's otherwise known as 'cross point switching'

    Many years ago (about 40 to be precise!) I made a simple diode cross-point switch to decode a Single Pole 10-way rotary switch to 7-segment LED display using a diode matrix.

    Google the bold words to see what I mean (diode matrix in particular)
     
  9. AnalogKid

    AnalogKid

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    722
    Jun 10, 2015
    Are any of the wires bi-directional, or are some of the source-only and some load-only?
    Can you post a wiring diagram indicating the signal flows?
    Can you post any other useful information - size restraints, budget, environment, power sources available for the control circuit - ???

    ak
     
  10. BobK

    BobK

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    Jan 5, 2010
    Depending on what you mean, the button itself can do all of that.

    Does a single button make / break multiple connections on only a single one?

    It the change momentary or latching?

    Bob
     
  11. ChosunOne

    ChosunOne

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    Jun 20, 2010
    Your objection to using relays--I assumed electromechanical relays, with electomagentic coils and mechanical armatures with physical contact points--seemed to be their size cluttering up the board. That's why I suggested transistors instead. They're smaller and many can fit on a PCB without "cluttering it up."

    Switching transistors, aka solid state switches, aka solid state relays are all essentially the same thing: Transistors, Some switching transistors are called "solid state relays" but they aren't relays, they're transistors: Semiconductor devices with smaller size and power requirements.

    We could eliminate a lot of useless suggestions if you would post a schematic with relays, and then ask how to eliminate the relays.
     
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