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  1. #1
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    Colored LED for night recognition.

    I was thinking about rigging up some colored LEDs, something like would be in a keychain, or behind a faceplate on a piece of audio equipment, and putting them on the top of my fork legs so that other friends can tell it is me when ridding dark trails. I am still new to the DIY lighting thing, so I dont really know what it would take to do this.

    Can it be done with just two LEDs, a switch, some wire and a battery, or would you need a driver for it too? Also, would a watch battery work for something like this?

  2. #2
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    Reputation: bumphumper's Avatar
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    Hi e39, good idea. Ive seen a few folks use something like this:

    http://www.blinkers.co.uk/blinkers-products.asp

    Highly visible even at long distance!

    If you go the diy route, you could use some 3mm leds and depending on the supply voltage you may only need a series reistor, no driver needed.

    If you google "led series resistor calculator" you should come up trumps

    hope this helps

  3. #3
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    Thanks bumphumper, there was a lot of info from in that search. I guess once I pick an LED, then I can use the calculator.

    Is there a certain name for this type of LED? I am not having any luck finding them on DX.

    Also, I wonder if blue LEDs are illegal in the US?

  4. #4
    Lets RIDE!
    Reputation: Jim Z in VT's Avatar
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    I would guess you want the 3mm or 5mm LEDs. I haven't come across them at DX, but RadioShack has a pile of them. The "MCD" number is a measure of brightness.

    I don't think a single tiny blue LED is going to bother anyone, but if you'll be riding roads with it, a call to the local police station would answer that question. I have heard of people being stopped for having blue accent lights on their cars.

    JZ
    It's not about speed, it's about lack of control.

  5. #5
    Carbon8er
    Reputation: El34's Avatar
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    Here's what you need baby!!!!
    http://www.dealextreme.com/details.dx/sku.23490

    You would be the envy of all you meet



  6. #6
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    Well, I went to RadioShack, and bought some green LEDs. I wanted to try one, so I took the bulb out of my Mini Maglight, and inserted an LED, and the stupid things are yellow. They had three different types of green LEDs, so I guess I will try some different ones.

  7. #7
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    Quote Originally Posted by e39-540i
    Well, I went to RadioShack, and bought some green LEDs. I wanted to try one, so I took the bulb out of my Mini Maglight, and inserted an LED, and the stupid things are yellow. They had three different types of green LEDs, so I guess I will try some different ones.
    If you put too much juice through a green led they do go yellow in colour. Do you have a multimeter? Set it to continuity, then touch the leads to the legs of the led. It should light up, albeit a bit dimmer.

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