Results 1 to 5 of 5

Thread: You think 1W+ pointers are dangerous!

  1. #1
    Join Date
    Jun 2010
    Location
    Australia
    Posts
    3,730

    Default You think 1W+ pointers are dangerous!

    Chech this Archimedes solar death ray made from mirror ball mirrors!

    Pretty cool, but I have no idea what I would use this for, perhaps lighting a BBQ?

    http://gizmodo.com/5747513/teen-glue...olar-death+ray

    This device was destroyed in a shed fire, I guess he left if too near the window!!!
    This space for rent.

  2. #2
    Join Date
    Dec 2008
    Location
    Canada
    Posts
    972

    Default

    Now to build a 20 foot collector to heat the house... ... Hmmm
    Create hot water for heating... washing... Hmmm
    Need to track the Sun though... Oh yeah... and must have Sun...

    Jerry
    See the LaserBee II and all other LaserBee LPM products here....
    All LaserBee Laser Power Meter Products

    New 3.2Watt RS232/USB LaserBee II LPM REVIEW


    Always in stock and ready to ship....
    Subsidary:-Pharma Electronic Solutions

  3. #3
    Join Date
    Aug 2008
    Location
    UK
    Posts
    5,704

    Default

    Make a good project for a school show and tell.

    ....and Erics project is the one next to the burning cheerleaders.

    Pretty impressive thoughwhen it can burn through metal. Wonder about UV levels though.

  4. #4
    Join Date
    Aug 2008
    Location
    Seattle
    Posts
    218

    Default

    You can get large, extremely dangerous solar collectors for free these days. The "free" section on Craigslist lists quite a few big screen projection tv's whose owners don't want to have to pay to get rid of. With a truck and a friend, and a little disassembly elbow grease, you get a pile of gorgeous optics (At least with CRT type TV's), a giant sheet of first surface mirror (cheap/free source for bounce mirrors) and a VERY large fresnel lens the size of the screen. Did I mention that it's extremely dangerous? I did? Well, it bears repeating: It's EXTREMELY dangerous when used as a solar collector.

    Have fun kids.

  5. #5
    Join Date
    May 2008
    Location
    Wisconsin
    Posts
    449

    Default

    Quote Originally Posted by White-Light View Post
    Wonder about UV levels though.
    They're not front surface mirrors, so the light has to pass through glass before and after being reflected. Glass is a very poor transmitter of UVB

    I bet aluminum foil would be easier and give similar results since the surface might be smoother with less gaps and less material for the light to travel through.

Posting Permissions

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