Home made helmet light

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  • 08-02-2009
    gbowen444
    4 Attachment(s)
    Home made helmet light
    Couple of pictures of my homemade setup.

    2 x Cree XRE R2 LEDs
    2 x 1amp driver boards (7135 based constant current at 1amp)
    Switchable between high and low (1amp or 2 amps)
    Total weight is about 400g
    Weight of head unit is 120g
    Runs on 8AA batteries (2x4 serial/parrallel) which is about 4.8 volts.
    Burn time is 2 hours on high or 4 on low approx
    Cost around $40 in parts from dealextreme and local hardware shop (not including batteries mount and wire which are re-used)

    Still have to seal up the front with silicon but other than that I am very happy with it. I also have built a 3 LED version for the bar also running at 2 amps, minus the heatsink fins.

    Attachment 474180

    Attachment 474181

    Attachment 474182

    Attachment 474183
  • 08-03-2009
    piesoup
    Cant see any pictures bud!
  • 08-03-2009
    piesoup
    My bad! Didnt have images enabled in my browser!
    The heatsink looks like a funky hair cut!
  • 08-03-2009
    Southern Adventurer
    It looks like the Bart Simpson of bike lights! Very cool and imaginative..
  • 08-03-2009
    gbowen444
    It was the best i could do with the limited Aluminium sections available from my hardware store.
  • 08-04-2009
    ocean breathes salty
    Quote:

    Originally Posted by Southern Adventurer
    It looks like the Bart Simpson of bike lights! Very cool and imaginative..

    I was thinking something similar....

  • 08-04-2009
    piesoup
    Quote:

    Originally Posted by gbowen444
    It was the best i could do with the limited Aluminium sections available from my hardware store.

    Hey, I bet it has way more light output than a light of the same cost that has a brand name! Is this your first? If it is, welcome to the world of constantly making a newer, smaller, brighter light!

    I use the same optics you do and I am really impressed with them. Have you got any beam shots yet?
  • 08-04-2009
    troutie-mtb
    OOHH dear another (Victim) stroke enthusiast heading down the lumen hunting slope

    Nice one Gbowen sounds like you have had fun doing the builds thats good diy
    using what you can get for a great light .

    and the nice smug feeling when you use it on the trails :thumbsup:
  • 08-04-2009
    Southern Adventurer
    I like the pop-rivits too. I started using those to attach a mounting bracket to the underside on some of my versions for trail running. Very stong.
  • 08-04-2009
    zen bicycle
    We have another victim..I mean enthusiast
  • 08-04-2009
    zen bicycle
    weird with the double post

    good job though