Newbie looking for some help

Discussion in 'The Projects Forum' started by huse0054, Mar 2, 2012.

  1. huse0054

    Thread Starter New Member

    Mar 2, 2012
    Hi, my name is Matt and I am new to this forum and to electronics. I am looking for some help on a project I am building for my daughter and not sure if this is the correct spot to post.

    I am building her name in LEDs and each letter is connected to a simple switch. It will be running on either 16 or 12 volts and each letter will have 15-20 LEDs. 6 letters in total. I have that part figured out.

    So my question.... I would like to be able to create a circuit so that when all 6 letters are lit (in no particular order) it triggers something, either a light, dc motor, speaker etc....

    Hope that makes sense.
  2. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
    What are you using for your "simple switch"es? If you haven't already purchased them, using DPST (or DPDT) switches, you can use one pole to switch on your LEDs and run a circuit in series through the other pole. This will only be on when all switches are closed and can drive your motor, etc...

    A low tech solution...

  3. huse0054

    Thread Starter New Member

    Mar 2, 2012
    Thanks for the info on using DPDT switches, however I do already have the switches and many of them are not DP. Anyother solutions that might work? Given what I am trying to accomplish? I am willing to learn about another options that might be more "high-tech". Would using transistors do anything for me here?

    Thanks again for any input.
  4. Dritech

    Well-Known Member

    Sep 21, 2011

    Try using AND gates. I did the attached diagram for you, but im not sure if it will work.
  5. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    Or you could get really interesting and control everything with a microcontroller. :)
  6. huse0054

    Thread Starter New Member

    Mar 2, 2012
    Interesting, not sure what AND gates are. Is it worth me researching them further if you said you are not sure if they will work? I guess I thought it would be fairly simple to have something be triggered when all switches are on.

    I know the DPDT switches would work but thought there might be other solutions.

    Anybody have a diagram or further info on a simple microcontroler that could accomplish this?
  7. Georacer


    Nov 25, 2009
    If you don't want to delve deeper into electronics, which would mean a week of experimenting for this project and benchtop supplies like a soldering iron, solder and perf-board, buying new switches would be the easiest choice.