Foggy Ride/homebrew lighting system
Results 1 to 5 of 5
  1. #1
    RoadBikeReview Member
    Reputation: Andy M-S's Avatar
    Join Date
    Feb 2004
    Posts
    805

    Foggy Ride/homebrew lighting system

    This morning's commute was kind of foggy (see below) and gave me a chance to test out my new headlight . In fog, it works as a "be seen" light, but in the dark it throws a nice beam.

    Quick details: The headlight is a BiSy light head mounted to the front brake bolt, wired up to a Qualcomm Lithium-ion rechargeable battery. Nominally, the halogen bulb is 3w, but I did some measuring, and with the Qualcomm battery, nominally 7.2v but actually a little higher, the light is taking in a little over 4w. The battery is in a Topeak Alien holster that is velcro'd to the side of the stem--almost invisible, and weighs less than a pair of AA alkalines.

    If the battery lives up to expectations, I should be able to get just under two hours out of a charge.
    Attached Images Attached Images

  2. #2
    RoadBikeReview Member
    Reputation: High Gear's Avatar
    Join Date
    Mar 2002
    Posts
    2,471

    Lightbulb Pretty cool

    What was the total cost of the whole set-up and where did you get all the parts. I may want to try this if it's cost effective.

  3. #3
    RoadBikeReview Member
    Reputation: Andy M-S's Avatar
    Join Date
    Feb 2004
    Posts
    805
    Quote Originally Posted by High Gear
    What was the total cost of the whole set-up and where did you get all the parts. I may want to try this if it's cost effective.
    I think I paid about $25 for the BiSy head and mount from Pete White Cycles...I upgraded the bulb from 2.4w to 3w for another dollar. The Qualcom battery and charger cost about $12-15 from All Electronics (www.allelectronics.com). I added phono jacks to the light and charger, and a phono cable to the battery, for another $4 or so.

    I have been warned, correctly I suspect, that the life of the bulb will be dramatically reduced (from around 100 hours to more like 20) by such overvolting...so we'll have to see how that goes.

  4. #4
    Just Riding Along
    Reputation: KeeponTrekkin's Avatar
    Join Date
    Aug 2002
    Posts
    1,024

    Very Creative ...

    Could it be set up to use disposable batteries too? Is Radio Shack another possible source of bits and pieces?

    Tx

  5. #5
    RoadBikeReview Member
    Reputation: Andy M-S's Avatar
    Join Date
    Feb 2004
    Posts
    805

    Yep

    Quote Originally Posted by KeeponTrekkin
    Could it be set up to use disposable batteries too? Is Radio Shack another possible source of bits and pieces?

    Tx
    Sure. You could set up a battery pack using a Radio Shack battery holder and 4 of your choice--AA,C, or D batteries. That should give you longer battery life as well. And Radio Slack is a great place for such parts. Just get the headlight from Peter White, then build a pack to run it.

    HOWEVER...

    The nice things about Lithium Ion batteries are (1) rechargeable, (2) small, and (3) related to 2, of course, extremely high energy density.

    The downsides of Li Ion batteries are that they really are very expensive if you don't get them surplus, and they're picky about charging. And, in this case, since the bulb is being over-volted, it's likely not to last as long. (Hmmm...I've got to look into the possibility of a regulator module!)

    That's why $12-15 is such a great deal for a battery and charger. If you try to pick up a similar battery new, it'd probably run $30-$50.

Similar Threads

  1. I wish Shimano would make an STI disc system
    By Jaybo in forum Components, Wrenching
    Replies: 48
    Last Post: 04-29-2007, 07:22 AM
  2. Speed play zero system
    By Sintesi in forum Components, Wrenching
    Replies: 2
    Last Post: 04-05-2004, 06:49 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

THE SITE

ABOUT ROADBIKEREVIEW

VISIT US AT

© Copyright 2019 VerticalScope Inc. All rights reserved.