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DIY Clearcom Call Signal Flasher

Discussion in 'Sound, Music, and Intercom' started by willbb123, Feb 18, 2009.

  1. willbb123

    willbb123 Active Member

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    I basically want to make on of these:
    [​IMG]
    I have read this thread (http://www.controlbooth.com/forums/sound/7853-clearcom-diy-cans.html) and I am thinking that I can just take the right LED and some resistors, connect it to the right pins and it will work. But I know that it will be more complicated then that...

    I see no reason to have a tone, it would be nice to have a brightness control, but if its only a single LED I dont think its necessary. It really doesn't need to flash, just light up when the call button is pressed.

    Has anyone built something like this, or have any ideas to where I could get started?
     
  2. Eboy87

    Eboy87 Well-Known Member

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    Almost been discussed here.
     
  3. willbb123

    willbb123 Active Member

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    I am not familiar enough with resistors to design my own. I really dont wanna screw up our clearcom system.

    Can someone make a diagram and a parts list?
     
  4. willbb123

    willbb123 Active Member

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    This parts are all here. I just dont know enough about resistors to pick the right one.
     
  5. willbb123

    willbb123 Active Member

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  6. Chris15

    Chris15 CBMod CB Mods Premium Member

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    OK, so based on that LED.
    Forward Voltage = 12v
    Current draw = 15mA
    Supply voltage = 30v

    So V drop = 18v
    R = V/I = 18/15m = 1k2
    So you need a 1.2k resistor.

    P= VI = 18*15m = 0.27W
    So better make that a half watt resistor for good measure.

    Remember that pin 3 is + and pin 1 is ground.

    You might make your unit more versatile by adding a male connector as a loop through....
     
  7. gafftapegreenia

    gafftapegreenia CBMod CB Mods

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    This seems deceptively simple.

    But I think I want mine in incandescent.
     
  8. clamcmurray

    clamcmurray Member

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    I've seen a home made recently that made use of a 12v Amber rotating beacon. Anyone have an idea how to make one work?
     
  9. Lambda

    Lambda Active Member

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    While we're almost on the subject, anybody know of something like this for Telex Audiocom? That's more complex, because I believe the system uses a 20khz tone to signal a call.
     
  10. cpf

    cpf Well-Known Member

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    It's actually quite easy with a 567 tone decoder. http://cpfx.ca/theatre/index/telexcallhw/ is one specific rendition I slapped together with scrounged up parts a while back. Build and use at your own risk of course.
     
    Lambda and (deleted member) like this.
  11. Lambda

    Lambda Active Member

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    Thanks, it never occurred to me that there was such a thing as a tone decoder. I was thinking that the circuit would need to use a series of high-pass and low-pass filters to isolate the 20khz.
     
  12. Chris15

    Chris15 CBMod CB Mods Premium Member

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    I suspect that "under the hood" that's all the 567 is, a series of filters and then a comparator...
     
  13. bishopthomas

    bishopthomas Well-Known Member

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  14. FrankieMcDJ

    FrankieMcDJ Member

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    Hi guys,
    Just getting back to the DIY clear com project,Can someone help me to connect this up :

    http://www.ebay.co.uk/itm/12V-Unive..._DefaultDomain_3&hash=item462da5f7ad#shpCntId

    Brand Name: OEM Design
    Condition: 100% Brand New
    Round lamp diameter: 3.5CM, thickness: 0.5CM, line length: 33CM
    White connector size: 2.7 * 2.1 * 1.8CM, line length: 39CM, 6CM
    Shade Type: Lens
    Current: 0.1 (A)
    Power: 10 (W)
    Life: 30000 (h)
    Luminous flux: 800LM
    Color temperature: 7000K
    Source: High Power LED
    Adaptation models: 12V all models
    Color: White
    Wiring: red to positive level, the black wire to the negative level.
    Features:
    Brand new and high quality
    Super bright and high power
    Low energy helps save your power supply
    Long life expectancy
    Easy to install and use
    Great for night driving and emergency situations
    Package Included:
    2 * lights,
    1 * connector
    4 * screws

    I would imagine it would be ok to connect this directly to pins 1 & 3 or do I need a resistor?

    Thank you!!
     
  15. WooferHound

    WooferHound Active Member

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    That is a 12vdc light . . . Clearcom is a 24vdc system
    Also it says it is a 10 watt light which is almost a full Amp of power at 12 volts
     
  16. FrankieMcDJ

    FrankieMcDJ Member

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    Is says : Current 0.1 amp?
    If it is 1amp as you mentioned would it really matter seeing that it will only be activated for a few seconds each time?
     
  17. WooferHound

    WooferHound Active Member

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    It says that it is 10 watts at 12 volts
    10 watts divided by 12 volts equals .83 amp
     
  18. FrankieMcDJ

    FrankieMcDJ Member

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    So will it work or cause damage?
     
  19. WooferHound

    WooferHound Active Member

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    24vdc will eventually kill the 12vdc LED light, but it will be ultra bright.
     
  20. FrankieMcDJ

    FrankieMcDJ Member

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    Can you suggest a resistor I could use?
     

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