This article was posted to the Usenet group alt.hackers in
1995; any technical information is probably outdated.
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Re: ports?
Article: 8544 of alt.hackers From: kson@junior.wariat.org (Kyongsu Son) Newsgroups: alt.hackers Subject: Re: ports? Date: 9 Sep 1995 04:56:27 GMT Organization: Akademia Pana Kleksa, Public Access Uni* Site Lines: 29 Approved: yes Message-ID: 42r6pr$50m@wariat.wariat.org NNTP-Posting-Host: junior.wariat.org X-Newsreader: TIN [version 1.2 PL2] Status: RO
: FINAL question... where can I find a bright source of infared : light? I need a bright infared light with no visible light, for : use with my starlight goggles. I've got a 1.25" black plexiglas-like : disk that fits over a mag light, but I was robbed for $22 for the : little bugger, and don't care to pay a proportional price to fit : my spotlight or lantern with one. Either a special light source, : (all the infared LEDs I checked are too weak) or a not-so-expensive : filter to place on a visible light source. Also, what visible lights : produce the most infared? (flourescent lights produce NO infared, : so they are no good) I've tried those IR filters which fit over your spotlight... they work well but in the dark they glow a dim red if you look at it... An infrared laser diode works extremely well... You need to get a regulated power supply, and to make it work optimally, you should get a focusable collimating lense so you can adjust the spread of the light... Find out what the optimum wavelength is and find one near that. The cool thing is that it is extremely invisible to the naked eye.. and if you couldn't get a non-visible diode, its difficult to pinpoint where the beam is coming from. ObRelatedHack During a preplanned game of midnight capture the flag, I was in the van with all the coats... It was relatively easy to affix IR LEDs powered by the 1.5V cell you can take out of a 9v battery to the opposing teams' coats. Suffice to say, we didn't lose (although I might add that we didn't win either)
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