• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • Ticket to Ride; LED Bike Light

    November 29th, 2008
    bikes, gaming
    Thanksgiving was nice, but sort of strange. Alice, Rose, and Danner came from Western Mass; Anne, Lee, and Meghan came from Philly. No same-age cousins, though. Calmer than usual, and a little less fun without Stevie, Susanna, and Claire. But still fun.

    We played a lot of the Train Game, and I tried a 'rush' strategy where I ignored all route tickets and just went for the six train fifteen point routes that would use up my trains really fast. I also took routes when it would make someone else take a costly detour. The goal was to finish the game when lots of people would have routes unfinished and couting against them. It worked, and everyone was mad at me. A bit disruptive.

    I finished up the light for my bike. I ordered a Cree XR-E (R2 bin, WH tint, about 115 lumens ar 350mA) from Cutter along with a 10 degree / 40 degree elliptical lens with holder at 90% efficiency. I'm running it off my new Sturmey Archer X-FDD hub dynamo (6V at 3W). I put the LED in the place of the incandescent bulb in the chrome bullet headlight that came with my bike. Pictures:

    That copper mass under the light? Heatsinking. The light is only about 15% efficient, so the rest of the 3W is heat. Unlike a bulb, that makes the led unhappy. So I have the LED mounted on an aluminium star, that soldered to 12 gauge copper wire, that running through a notch cut in the bottom of the light enclosure and soldered to a beautifully twisted copper marvel (rats nest) to maximize heat transfer with the air.

    Comment via: facebook

    Recent posts on blogs I like:

    Moral aesthetics

    “Doing good” differs by subculture The post Moral aesthetics appeared first on Otherwise.

    via Otherwise September 29, 2022

    Futurist prediction methods and accuracy

    I've been reading a lot of predictions from people who are looking to understand what problems humanity will face 10-50 years out (and sometimes longer) in order to work in areas that will be instrumental for the future and wondering how accurate thes…

    via Posts on September 12, 2022

    On the Beach

    I really like going in the water and this beach is a great place for building sand castles and boogie boarding. I also like trying to float on top of big waves. I'm not very good at it. I only float on the flat waves.

    via Anna Wise's Blog Posts July 12, 2022

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact