Solid State Relay Help:Christmas Lights that go to Music

Discussion in 'The Projects Forum' started by badtzmarulol, Dec 27, 2013.

  1. badtzmarulol

    Thread Starter New Member

    Dec 27, 2013
    6
    1
    Last edited: Dec 27, 2013
  2. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    Both posted links give an 404 not found error.
    You probably will need to amplify the sound signal to get enough voltage to drive the SSR.

    Bertus
     
    badtzmarulol likes this.
  3. badtzmarulol

    Thread Starter New Member

    Dec 27, 2013
    6
    1
    updated both links!

    I'd thought so! Can you direct me to a relay that will work then without having to make a voltage multiplier?

    If not, I have no engineering background what so ever! So, is there a way you can direct me to a site that will teach me how to make a voltage multiplier in simple terms?

    Do I need to plug this into an audio receiver? With this setup, i should be able to plug it in directly to my laptop/ipod?
     
    Last edited: Dec 27, 2013
  4. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
    Hello,

    As the SSR needs a DC input and your audio will be AC, it will need rectifying.
    You can double the voltage during rectifying with a circuit like this in the eBook:
    http://www.allaboutcircuits.com/vol_3/chpt_3/8.html

    Use a bit larger capacitors as in that schematic.

    Bertus
     
  5. inwo

    Well-Known Member

    Nov 7, 2013
    2,435
    315
    Won't be enough power (mw) available at headphone jack or line output. IMO

    Use an amplified speaker between ssr and audio source. Disconnect speaker and wire direct to ssr.

    ~1 watt should have peaks @ 3 volt.
     
  6. badtzmarulol

    Thread Starter New Member

    Dec 27, 2013
    6
    1
    I can't seem to get this to work!

    So, I took the +/- from a old comp speaker.

    When I power everything up, the "input" light never flashes or turns on. So I'm assuming the wire isn't carrying enough voltage to the input!

    Is there any way to increase the input voltage from the speaker cables? Like a super easy way? I don't know how to solder or do anything like that! :'(
     
  7. inwo

    Well-Known Member

    Nov 7, 2013
    2,435
    315
    If I get time today I'll test your circuit.

    Does the speaker have a watt rating?
    I believe that I calculated needing ~1 watt.
    Can you crank up the input to speaker?

    A transformer is simplest I can think of. It can't raise the power, but can raise output impedance, which may help.
     
  8. inwo

    Well-Known Member

    Nov 7, 2013
    2,435
    315
    Wasn't able to duplicate exactly. I'd have to tear into one of my speakers.
    Just might!

    What I can tell you, is that the ssr will start to turn on at very low volume levels.

    Problem with my test is that my only handy signal source is 600 ohm.:(

    Hope we can extrapolate that your hefty volume level thru a transformer will drive an ssr.

    Do you have access to a transformer? Even a doorbell transformer. Don't want you to buy anything if it doesn't work out.

    Have you tested ssr connections? Connect input to 9v battery.
     
  9. inwo

    Well-Known Member

    Nov 7, 2013
    2,435
    315
    Well that wasn't too bad.:D

    The powered speaker has a jack outputting to the second speaker.
    So I just plugged in the ssr input to that jack.
    As you found out. Not enough drive voltage.

    Tried to use something that you might have access to.

    A small 24 volt transformer was not enough.
    16 volt = no go.
    8 volt starts blinking on the peaks.:)

    That's about 1.6 ohm to 363 ohm and not even optimized for audio.

    Found an audio transformer that works perfectly. 8ohm X 3K ohm.
    That doesn't help you though.:(
     
  10. sheldons

    Well-Known Member

    Oct 26, 2011
    616
    101
    heres a simple sound to light circuit but for leds only-can be altered for mains lighting with a few changes......
     
  11. Metalmann

    Active Member

    Dec 8, 2012
    700
    223


    Sheldon, what is the component U1-1?
     
  12. inwo

    Well-Known Member

    Nov 7, 2013
    2,435
    315
    All op needs is the first stage.
    Has the isolation.

    The problem is, doesn't solder.:(
     
    Last edited: Dec 31, 2013
  13. sheldons

    Well-Known Member

    Oct 26, 2011
    616
    101
    u1 is an opto isolator..........
     
    Metalmann likes this.
  14. sheldons

    Well-Known Member

    Oct 26, 2011
    616
    101
    have had a look at that site-what a load of absolute rubbish is posted on such a site -people try these things and will never get them to work
     
  15. badtzmarulol

    Thread Starter New Member

    Dec 27, 2013
    6
    1
  16. inwo

    Well-Known Member

    Nov 7, 2013
    2,435
    315
    It may.
    Not risking much.
    For a couple bucks, give it a shot.
    Unless you have a tube radio in the junk box you won't find much better.
    No info from link.
    My search tells me that it is 8ohm to 1k ohm.

    Less voltage increase than the one I used.

    You would connect the 8 ohm leads to audio and 1000 ohm leads to ssr.

    Hope you don't expect too much from this project.
    At best it will flash lights with peak levels.

    The upside is. No soldering. Just 4 more leads.:)
     
  17. inwo

    Well-Known Member

    Nov 7, 2013
    2,435
    315
    Looked at my notes.
    the 8v transformer worked marginally. 15/1
    The 8ohm to 3000 ohm was better. 20/1
    The rs one is only 11/1 turns ratio.:(
    I won't bet on it working.
    Still put it in "nothing to lose" category.

    The home depot 70 volt trans are no better.

    A single transistor circuit works. I tried it. But requires some electronic skill.
    This might be a good time to learn.:)


    ps.

    1 transistor, 1 cap, and 1 or 2 resistors...............................

    Or a new idea...............

    Find a transformer type wall wart.
    I tested a 9vac and it works without even opening it.
    Anything below 12 volt should work.
    If dc, just gut it, and connect transformer only.
     
    Last edited: Jan 1, 2014
  18. badtzmarulol

    Thread Starter New Member

    Dec 27, 2013
    6
    1
    I do have a spare! 9VAC wall wart.
    So, what I'm I doing exactly with this wall wart?

    Take any audio cable splice it, Take my wall wart cable splice that. Connect the two with like a wire nut? Then attach that to the ssr? That way, the signal will be carrying a stronger current?
     
  19. inwo

    Well-Known Member

    Nov 7, 2013
    2,435
    315
    Connect the two prongs that would plug into wall, to the ssr input.
    In my test I just held them together.

    Run your audio into the wall wart jack. The 9 volt ac end. Or cut the jack off and connect the two wires to audio source.

    Either way on both ends. Ac makes no difference.

    IT MUST BE 9VAC output

    Just as the transformer inside changed voltage levels from 120vac to 9 vac.
    Backwards it will raise the voltage level from low to high.

    I'll let you use your imagination on how to connect wires.


    As others have stated. It's not the best way. Can't promise success.
    Many reasons why it may not work.
    It DID work for me. And my relay requires 4vdc to trigger.
     
    badtzmarulol likes this.
  20. badtzmarulol

    Thread Starter New Member

    Dec 27, 2013
    6
    1
    IT WORKED! OMG IT WORKED!

    thank you so much! I appreciate all your input!
     
    inwo likes this.
Loading...