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Thread: SSR's explained

  1. #1
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    Default SSR's explained

    This post is to help explain "What the heck is a SSR?"
    The SSR is a Solid State Relay. To put it in simplest terms, there are two switches to turn on one channel. The signal from the controller to turn on the lights is sent to the SSR. It goes into the first "switch" the Opto Isolator. The ‘Opto’ is a photo sensor and LED. This component’s job is to protect the controllers from the 120v that is on the SSR. The second ‘switch’ is the Triac, which is operated by the ‘Opto’. The Triac switches the 120v that goes to the lights. Both components need resistors in front of them to limit the current to operate them.

    The parts of a SSR




    Below is a picture of a bare pcb of the SSR




    Parts assembly… I left some parts off, as to see the silkscreen and how the parts are placed. Make special note of the dot on the Opto , and the tab of the Triac. These parts must be installed that way. The resistor values are different for the Opto’s and Triacs. The 750ohm are installed before the Opto, and the 180ohm is installed before the Triac. The resistors are not current directional, so installation direction is not important. Although, it looks very nice when they are all oriented the same way. The LED is directional. The short lead goes into the pad on the flat side of the silk screened outline.




    After your SSR is assembled, it needs an enclosure. There are many different ways to do things from here. You can wire extension cords to them or use wall outlets. You do what suit your needs.
    This is an example of the using a wall box and outlets. You will notice that there is a piece of aluminum on the Triacs in the pics. This is a heatsink. Good insurance to have, but is debated to be ‘needed’




    When you wire the outlets, do them all the same. This is so the channels are all in the same location per the 4 plugs. You must break off the jumper tab on the ‘hot’ side of the outlets so you have 4 separate outlets. You can leave the jumper on the common side to save on wires.




    A completed assembly…



    You can get creative to make things fit you needs. Here are some really neat ways to put them in enclosures. The link under The Pod gives a step by step assembly, which is the basic principle of assembling the SSR.



    "The Pod" How To










    You can even use them as part of your display…..





    Just remember.... The SSRs are carrying 120VAC. Please BE CAREFUL! Triple check your work, make sure no stray strands of wire are about, no wires are laying on the Triacs (they possibly can get hot and melt wire insulation) When testing them, plug them into a GFIC outlet just to be safe.

    And don't forget, have fun and enjoy yourself.
    Attached Files Attached Files
    Last edited by Wayne J; 08-06-2008 at 09:47 PM. Reason: added BOM

  2. #2
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    Default Re: SSR's explained

    Nice job Wayne. The pictures explain it all. Now I have to go look for snowmen for encloses, my 4" pipe enclosures just don't match up.
    2 Grinchs, 2 Ren C's and a Ren T for 128 channels (in 2008)
    2 Ren64, 2 Ren24, 2 Ren24ss, 4 Ren16ss and 8 Ren8ss for 352 channels (currently)

  3. #3
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    Default Re: SSR's explained

    Nice

    Thanks Wayne

    Bill

  4. #4
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    Default Re: SSR's explained

    Isn't wayne just the man, first etching, then the MPLAB Pic programming, and now this...

    "Were not worthy" (Brought to you by Wayne's World)

  5. #5
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    Default Re: SSR's explained

    I think about the only thing you can do to make this better would be to make the SSRs for me. DIWC (Do it Wayne Christmas).

    Nice job.
    1 channel, 0 dimmable. Powered by a man flicking a lightswitch to the beat.

  6. #6
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    Default Re: SSR's explained

    Quote Originally Posted by deplanche View Post
    I think about the only thing you can do to make this better would be to make the SSRs for me. DIWC (Do it Wayne Christmas).

    Nice job.
    WDYC Wayne Does Your Christmas ;)

    Very nice Wayne. Seeing this made me remeber to put one of those 2nd hands with the nice clips. I had my eye on one for a while and I think for my Bday I will get one!

    Ben
    128 lynx Freestyle DMX channels(not all used), 4 SSR4 DMX channels, 120 Ren24 channels, and 48 Ren16 channels!!

  7. #7
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    Default Re: SSR's explained

    Quote Originally Posted by deplanche View Post
    1 channel, 0 dimmable. Powered by a man flicking a lightswitch to the beat.
    How about 1 channel dimmable, powered by a man with a dimmer switch to the beat
    "Think you might be over doing it dad?" "When was the last time I over did anything?"
    [url]http://www.joneslights.com/[/url]

  8. #8
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    Default Re: SSR's explained

    I like the idea of the snow man.
    I have 2 blowmold santas and 1 frosty.
    Those ARE a great place to hid the controls.

  9. #9
    jeffathompson Guest

    Smile Re: SSR's explained

    [QUOTE=Wayne J;25199]This post is to help explain "What the heck is a SSR?"
    Alright, for a rookie I can even follow these directions. Who has got the boards? I can order the rest from Mouser?

  10. #10
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    Default Re: SSR's explained

    I believe wjohn keeps a stock of them. PM him and he can let you know.
    "Think you might be over doing it dad?" "When was the last time I over did anything?"
    [url]http://www.joneslights.com/[/url]

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