Optocouplers with microcontrollers

Discussion in 'The Projects Forum' started by newt, Jul 6, 2009.

  1. newt

    Thread Starter New Member

    Jul 6, 2009
    I'm working on a project where I want to control 8 outlets with a microcontroller. The load on the outlets will be 110-120 VAC and up to 600 W or 6 A, and the control voltage will be 5V DC from the microcontroller. I believe optocouplers will work best. I've seen several in quad DIP packages which would be awesome, but I can't find one that will fit my load parameters. Does anyone know of any? Thanks in advance.
  2. eblc1388

    AAC Fanatic!

    Nov 28, 2008
    Don't know if a 6A opto-triac ever exist, never see one in catalog. If one does exist, it is not popular or extremely expensive. So that is why it is out of the question.

    You can, however, use 5V to control a low amperage opto-triac to turn ON/OFF a normal 6A TRIAC.

    Takes a look at the data sheet of opto-triac MOC3020, MOC3021 or MOC30xx....
  3. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    How about a solid state relay? I'm sure you'll get one that will operate off an isolated input in the 3-32V DC range. Power side at 110V AC at 6A should be a "breeze".
  4. eblc1388

    AAC Fanatic!

    Nov 28, 2008
    How much current is needed to trigger the MOC3020?

  5. millwood


    a solid state relay would work.