>-----Original Message----- >From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] >On Behalf Of Jason S >Sent: 15 September 2004 09:39 >To: Microcontroller discussion list - Public. >Subject: Re: [OT] Too good (and cheap) to work? > > >Just to clarify, that's exactly that they're selling; a fresnel lens. > >Jason > >From: "Michael Rigby-Jones" >Sent: Wednesday, September 15, 2004 1:18 AM > > >> If you can pick up a suitable fresnel lens from one of the surplass >> companies cheaply enough, it may be worth trying just to >satisfy your >> curiosity, but it certainly won't be suitable for any serious home >> cinema use. By pure coincidence, a guy on a forum I frequent just posted his setup using an overhead projector and a modified TFT panel: "Ok quick run down of parts. 1x15" TFT screen because I want a decent resolution to play PC games, obviously no difference to the TV card, or DVDs as there resolution is lower. Reason for above gives me a power supply, and pc connection with no hard work. 1xOverhead projector, the old one you would have had at school, one I got from army and general store cost 25 1x small 6" fan clipped onto projector arm to provide cooling to TFT screen 1x Big can of white paint, when I started as was expecting similar throw to a standard digital projector, but forgot that I was projecting through a 15" screen where as they start at about 3.5" tft matrixes so thats why my throw is so great. Started the projector with my brother so we could play doom at what we where expecting as about 30" ish and said bugger, I better paint the whole wall. Best TFT screen is an Advent, reason is becasue of the ribbon cable connect that connects one side to the otherside of the TFT, mine isnt so had to do some very tricky soldering. The advent that we got for my brother has a long enough ribben so you dont need to solder. As I said its not pretty but its damn good, bulbs are cheaper, and it cost so very little for a throw thats better, and pixel ratio also better. Edited to say, forgot you need to do some cutting of the OHP top where the glass is as its too small for the TFT screen, also as I have a 15" tft with a standard fresnel im missing a bit left and right off the screen. If I could find a cheap 12x12" fresnel then id have the whole screen and even bigger throw. " ======================================================================= This e-mail is intended for the person it is addressed to only. The information contained in it may be confidential and/or protected by law. If you are not the intended recipient of this message, you must not make any use of this information, or copy or show it to any person. Please contact us immediately to tell us that you have received this e-mail, and return the original to us. Any use, forwarding, printing or copying of this message is strictly prohibited. No part of this message can be considered a request for goods or services. ======================================================================= _______________________________________________ http://www.piclist.com View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist