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Need help understanding this circuit

Discussion in 'General Electronics Discussion' started by bhtre123, Oct 18, 2012.

  1. bhtre123

    bhtre123

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    Oct 18, 2012
    Hello there,
    I am trying to power multiple LEDs with a number of these circuits in parallel, but I don't understand why there is a LED symbol where the arrow points to the "opto-isolator in solid state relay." Any help understanding this would be greatly appreciated.

    [​IMG]
     
    Last edited: Oct 18, 2012
  2. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Because on the site that image was created for there was likely an option pointed out to drive higher loads using solid state relays in place of the LEDs if one chose to do so...
     
  3. bhtre123

    bhtre123

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    Oct 18, 2012
    Thank you for your response! Here is the actual site: http://tap364.webs.com/construction.htm The image is near the bottom, with an explanation beneath. I don't believe that he mentions driving a higher load.
     
  4. CocaCola

    CocaCola

    3,635
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    Apr 7, 2012
    Doesn't mean he/she is the source of the original image and/or circuit ;)

    He mentions using relays and he also talks about using 'bulbs' from an x-mas light strand, those are a significantly higher load then a single LED...
     
  5. bhtre123

    bhtre123

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    Oct 18, 2012
    Haha. And dang, you're right. I totally forgot about that. I guess my real question is how the relays are part of the circuit, as in where they would go. Thanks for your help so far, I really appreciate it. :D
     
  6. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Solid state relays are an LED on one side and the output on the other, you would simply replace the existing LED with the LED side of the optocoupler aka solid state relay...
     
  7. bhtre123

    bhtre123

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    Oct 18, 2012
    Okay, so the LED represents a solid state relay, essentially. Thank you for your help!
     
  8. davenn

    davenn Moderator

    13,352
    1,775
    Sep 5, 2009
    well half of it :)


    Dave
     
  9. bhtre123

    bhtre123

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    Oct 18, 2012
    Duh.

    I feel like a complete idiot now. I just had an epiphany about what both of you were talking about, especially driving a higher load and how the LED represents the actual octocoupler and the output of the relay is not included. Wow, that was total noobage right there. Thank you for helping me to understand something I should have already known. :eek:
     
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