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Electronics Sound Activated Light Tubes

Discussion in 'Modding' started by R-E, 26 Mar 2010.

  1. R-E

    R-E New Member

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    I saw sound activated lighted, colorful tubing.

    I don't know how it was created, and I'm hoping someone here can explain it to me. I know very little about electronics, so if it is complicated, no need to go into too many details. I will be disappointed if I can not re-create.

    The tubing was ringed around, and attached to, a long fabric skirt. There were three separate tubes, three different colors. I believe the material of the tubing was some type of plastic or silicone, definitely flexible. It looked like the tubing was 1/2 inch diameter. There were no wires connected to anything other than something contained within the skirt. I assume powered by some type of pack inside the skirt. The lighting in the tubing was sound activated.

    The tubing was similar looking to glow sticks / necklaces, but larger/longer tubing and sound activated.

    I googled everything I can think of to see if it was a purchased product, but I didn't have any luck. Purchasing would be the easiest answer for me.

    Thank you in advance for your time.
     
  2. 731|\|37

    731|\|37 ESD Engineer in Training

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    If I were the one building it I'd use decorative 'fiber optics'. Basically a superbrite LED on the end of a piece of transparent vinyl tubing that goes around the skirt. The sound module would be simple enough to do depending on exactly what you were doing. My first imclination would be to use an LM 2719 or similar tachometer-type part to put out a voltage corresponding to a specific audio frequency. Then you can use a comparator with a reference voltage to toggle the light on and off with sound, or use the comparator's output to switch on or off any affect you want. If you take three or four of these and use different ascending reference voltages that corresponded to portions of the audible spectrum (20Hz-20kHz) you could 'stack' them up the skirt, play a scale and watch them climb the garment.

    Of course you'd need an audio pickup system and maybe a low power driver/amplifier to give the tachometer something it can work with but that's nothing something like the LM386 can't handle on a single supply (i.e. a battery).
     
  3. capnPedro

    capnPedro Hacker. Maker. Engineer.

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  4. Puk

    Puk (A shrewd and knavish sprite)

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    I think he means a kit like this: http://www.made-in-china.com/showro...exible-LED-Undercar-Kit-CF-2x90-2x120-X-.html

    You can get them in varying length, sad as it sounds Halfords use to stock kits like this. There are more technical kits about these days with multiple LEDs So variable colours, you can make the colour shift almost like a wave under the car back and forth whilst changing colours all controlled and programmer via USB. I'm not into such stuff but use to hang out with a guy who chiefly imported this kinda kit from the states. Google stuff like flexible undercar lighting, or multi ubdercar lighting etc, there are many sites out there. Tbh it'd be more a pita to recreate than to simply purhase a kit.

    Check out the likes of:
    http://www.litewave.co.uk/led_ground_lighting_ufo.asp
     
    Last edited: 7 Apr 2010
  5. Rotcrack

    Rotcrack Food Maestro.

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