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Registered Member #10
Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
Steve McConner wrote ...
An I want to be on TV "Yet Again" thing
Peter, PM or e-mail me if you want a hand with the power electronics, in confidence, this project is so crazy that it simply has to succeed
Raison d'etre you could say.
Steve, I might take you up on this. Due credit will be given. I will email as it is fastest for me.
Pic below is the setup on the bike. The frontend will be the same as the Worlds brightest bike lights and needs to be detachable.
This shows the 1.5 ohm equalising resistors needed for the 3 different colours. Red LEDs need almost 10V less.
R v.d. Tuuk wrote ...
could it be seen from outer space?
Space = arbitrary 100 miles. Lets look at the reverse. A satellite can easily be seen against a black sky with dark adapted eyes - particularly the Iridium series. These will reflect light from the sun at 200W visible light per m2 from a 1 degree source. The reflecting surface will be say one square m from the satellite. ..... actually I am having trouble getting my head around the concept. Anyone want to have a go with those parameters?
Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
Avi wrote ...
R v.d. Tuuk wrote ...
could it be seen from outer space?
heaven forbid you point anything above 1mW upwards, in Australia...
Yeah...They got strict rules on lasers, I wonder if they would complain about a beam of light. I've seen videos of arc lights beaming to the sky, looks cool!
Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
You can make light spots on clouds with a 1KW stage spot light. If you can see the bright spot on the cloud from the earth then I can't see why you couldn't see it from space. Spotlights are not that efficient (compared to LEDs) and you are running more than 1KW so I think it could be seen from space.
Registered Member #2893
Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
I suggest you make a bat signal attachment.
But you will never get a tight beam like a spotlight. There are multiple emitters, not one few inch long arc. Multimode beams are very hard to collimate, and it sure won't happen with only one reflector.
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
I totally need to buy one of these, it woud be so useful for blinding russian fighter pilots at take off / landing. maybe better then a stinger missle, and its reusable...
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World's brightest flashlight
