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Trying to separate the motor from the circuit

Discussion in 'Sensors and Actuators' started by Screemberry, Mar 18, 2013.

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  1. Screemberry

    Screemberry

    5
    0
    Mar 18, 2013
    Hello,

    I have created the following circuit and it works like a charm.

    [​IMG]

    I can apply 5 volts from pin 9 and the switch works (TIP 122) and the motor runs. What I am ultimately trying to do is to separate the motor and 12 volt adapter from the above circuit and connect it via an RCA plug.

    Here is a new circuit and what I am trying to do:

    [​IMG]

    As you can see, I have cut the negative line from the 12V adapter, and inserted a male RCA plug. Once it is shorted, the 'Adapter- Motor circuit' is complete and the motor runs. It is the female side I can't nail down.

    What I am asking for help is the following 2 things.

    1. How do I complete the circuit so the Transistor creates the short needed at the RCA plugs.

    2. There is no flyback diode at this point. Every diagram I have looked at says it needs to be across the motor. For it to be used in this senario, it has to be inserted to the left of the female RCA plug.


    Any help is greatly appreciated. Thx.
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,361
    2,756
    Jan 21, 2010
    Assuming the top wires are connected together and the bottom wires are connected together when the plug and socket are joined, do something like this:

    [​IMG]

    The circuit isn't exactly the same because the diode has to go in a strange place (but it will still work)
     

    Attached Files:

  3. Screemberry

    Screemberry

    5
    0
    Mar 18, 2013
    Thank you! I will try this when I get home tonight and post the result. :)
     
  4. Screemberry

    Screemberry

    5
    0
    Mar 18, 2013
    It worked!! Thank you for your help Steve.
     
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