two buttons

Discussion in 'The Projects Forum' started by stilllearning, Dec 10, 2013.

  1. stilllearning

    Thread Starter New Member

    Dec 9, 2013
    18
    0
    Hello I have a timer with two terminals On the back , when the terminals are joined and released it starts a timer, when you join them again it stops the timer. I can do all of this with one momentary push button , but can anyone think of a way to usee two buttons one to start and another to stop, but the sequence is start,stop,start,stop etc. I think a latching relay may work but I am not experienced enough to be sure, 12v dc system and suggestions welcomed
    Thanks
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
    8,754
    760
    I think you can.

    But to do tht we need to see the circuit diagram or a picture of the PCB from both sides.
     
  3. stilllearning

    Thread Starter New Member

    Dec 9, 2013
    18
    0
    Hello, thanks for the reply, I have no diagrams just the timer that I have powered up then run a wire from the two terminals in need to bridge through a push button then back to the other terminal and that's when I thought of the two switches, sorry if this is not enough Info
     
  4. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    Drawing the block of your wired, including the power and wiring of start/stop, and testing the flowing status.
    1. Two wires joined -
    2. Two wires released -
    3. Two wires joined -
    4. Two wires released -
     
  5. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,771
    971
    If you just want 2 buttons one labeled for stop and one labeled for start just put the 2 buttons in parallel..

    Never heard of someone actually wanting to increase the number of buttons to perform such a simple function.
     
  6. stilllearning

    Thread Starter New Member

    Dec 9, 2013
    18
    0
    Managed to get this working with a latching relay, the controller had the option to start timing when the inputs were bridged or when the inputs were bridged then released. So the latching relay keeps the input closed until the stop button resets it, thanks for reading
     
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