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DPDT - transistor

Discussion in 'Electronic Basics' started by [email protected], Mar 5, 2006.

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  1. Guest

    Anyone out there, if it is possible make a suggestion as to how to
    replace a dpdt with bunch of transistors.

    Just wondering if it is possible to do, as I like the neatness of
    transistors of a dpdt relay on my PCB.
     
  2. Tom Biasi

    Tom Biasi Guest


    Yes, its possible. But you may want to look into solid state relays.
    Tom
     
  3. Until you have to buy one. Those I've looked at aren't exactly cheap.

    Jon
     
  4. What are you switching and how are you controlling that?

    Jon
     
  5. Guest

    controlling via PIC 16f873a

    If you look at http://www.maxlean.com/motorcyclepages/tre.htm about a
    third of the way down you will see a bunch of wires connected with a
    dpdt. I would like to do the same thing with some transistors.
     
  6. kell

    kell Guest

    You'll still need a switch.
     
  7. Thanks. I'm not sure what the three wires do, though. May I assume
    one is ground, one 5V power, and one is 'signal?' And if so, which is
    which? If not, what's your interpretation of the three wires?

    Also, from the measurements, I gather they use a 1k resistor in series
    with the GPS resistance, with +5V as their source voltage on one side
    of the 1k, and measure the node voltage in something like this:

    +5V
    |
    /
    \ 1k
    /
    |
    +--------> measure this point's voltage
    |
    GPS
    |
    |
    ---
    ///

    Is that your take on it?

    Jon
     
  8. Ken Moffett

    Ken Moffett Guest

    wrote in @u72g2000cwu.googlegroups.com:
    I think a DPDT transistor configuration is refered to as an "H-bridge".
    Goggle that. Standad fair for a uC.
     
  9. Rich Grise

    Rich Grise Guest


    http://www.maxim-ic.com/SwitchMux.cfm

    Have Fun!
    Rich
     
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