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  1. H

    Looking for a thin light source

    I have some leaded glass windows (late 1800's) imported from the UK. They are in their original wood frames. I would like to place a light source behind them and hang them on the wall for decoration. Where can I get a backlit led panel on the cheap? Any good DIY white-ups? It doesnt have to be...
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    Is it possible to run a dynamo-based LED light from a battery pack?

    There is no good reason that you cant build a power supply for your light. I, too, am no EE...but logically it CANNOT be that difficult. However, when I posted the same question here, I decided it was too intimidating. I think the Ixon IQ Speed is a nice battery friendly light.
  3. H

    Let's design a road front light beam

    I hope I am understanding this correctly... The reflected light of the parabolic mirror provides the hotspot. The spill is produced by the emitter's exposed surface on the front side of the light (this is why cars have a shield covering the front of the bulb) Although we could do the same thing...
  4. H

    Help designing circuit for dynamo-charged-battery-driven LED lights

    I would like to do what you are doing, however I don't have a dynamo. I would like to run (lights designed for a dynamo) with rechargeable cells. I wanted to know if anything fancy was being done to maintain the appropriate input voltage...and if so, I want to copy it. :) From the instruction...
  5. H

    Help designing circuit for dynamo-charged-battery-driven LED lights

    In the process of performing this work, please provide the portion that highlights the battery portion. Specifically, I would like to run a Schmidt Edelux or Busch & Muller Ixon IQ Speed (or two) with cells that can be charged by my Pila charger. Assuming it involves something other than...
  6. H

    Let's design a road front light beam

    If you get the chance, please post a pic of the components you are working with. I have been experimenting with a glass rod out of an automotive foglight but am looking for inspiration. So far I have been able to aim emitters around the circumfrence of the barrel of the lens. By modulating the...
  7. H

    Lens simulator

    You can to some degree. Just use the 3 slide levers in the green box at the top. I wanted to turn it into more of a sphere shape b/c I'm working with a rod lens at the moment, but it wont let me change it that much.
  8. H

    Lens simulator

    This thing really helped me understand lenses. In the green box at the top, hit "screen": This turns the pencil into a bulb. You can click primary and marginal rays to see spill and hotspot size. You can also drag the lamp, lens, and screen left, right, and up/down. :twothumbs...
  9. H

    18650 charger and cells, do I have it right?

    Cool. Thanks!
  10. H

    18650 charger and cells, do I have it right?

    If I wanted to "be nice" to the cell, at what voltage should I stop use and recharge?
  11. H

    18650 charger and cells, do I have it right?

    I think I received the exact items but am still a little nervous. I read the stickies but it gave me just enough info to freak me out. Just to be clear I have: -Pila IBC charger -AW IC +Power Li-ion Rechargable 3.7V 18650 2600mAh As I understand, there is a potential danger of fire and...
  12. H

    Let's design a road front light beam

    If you rest a small mirror on the head of your light, it will produce a sharp cutoff and redirect the "waste" light to the road. Trouble is, the apparatus looks stupid.
  13. H

    Let's design a road front light beam

    I wonder of I could bribe these guys? http://www.rose-hulman.edu/SCOPE/
  14. H

    Let's design a road front light beam

    A possible solution? http://www.photonicsonline.com/article.mvc/ReflectorCAD-Simplifies-Segmented-Reflector-D-0001 Watch the demo on this page (I am regretting forgoing engineering at this point) http://www.breault.com/software/reflectorCAD.php
  15. H

    Reduced glare / oncoming traffic friendly bike lights

    Good info here: http://groups.google.com/group/randon/browse_thread/thread/78283ff5c6b83095
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