sound activated switch using triac

Discussion in 'The Projects Forum' started by skifer24, Mar 3, 2013.

  1. skifer24

    Thread Starter New Member

    Mar 3, 2013
    so we are working on a project that is a sound activated switch using triac. but i cant make it work also, im new in using livewire so i dont know what to do or what to add in this circuit. can you guys help me? thanks!
  2. panic mode

    Senior Member

    Oct 10, 2011
    to me, your circuit screams "i can get hurt". you should not play with AC until you get more experience. you didn't size components properly

    also you did not complete the trigger circuit. your triac (shown as SCR) needs voltage across Gate/A2 (or in case of SCR, gate/K). this means using two wires. your DC circuit only connects to SCR through one wire - you are missing reference (should connect negative side of battery to K/A2 of SCR).

    next your component values would not allow SCR/triac to turn on. if you want to experiment and troubleshoot your circuit before you connect to AC, replace triac with an LED. if your circuit can light up an LED, it can trigger triac.
  3. skifer24

    Thread Starter New Member

    Mar 3, 2013
    Sorry but can you guys help me so that this circuit can work? Edit or change but still using triac and minor adjustments?thank you
  4. sheldons

    Well-Known Member

    Oct 26, 2011
    try this circuit it is a little safer using leds,a mosfet and a few transistors on a safe 12v supply......
  5. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
  6. tracecom

    AAC Fanatic!

    Apr 16, 2010