convore.json/groups/alphaonelabs/idea-long-distance-laser-writer/messages.json

[{"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1302933475.6634049, "message": "You know how you can write on walls with a laser?  This will be like a LED scroller, only smaller.  You could project it through your friends window across the street to tell him the party is on!", "group_id": 868, "id": 709180}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1302933524.2654641, "message": "So he'd see a projection on the wall \"hey come over, party is on\"", "group_id": 868, "id": 709183}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1302933921.3315079, "message": "I could even see this being used for long distance communication.  Say you are out at sea, you could project a message to another boat.", "group_id": 868, "id": 709201}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1302933955.978102, "message": "Where audible communication cannot reach...", "group_id": 868, "id": 709203}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1302960591.770329, "message": "And what about a morse-code-translating transceiver? I mean... Even Ham Radio users don't know morse. This would be a simple layer of encryption, decryption,", "group_id": 868, "id": 710575}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1302960596.183897, "message": "I", "group_id": 868, "id": 710576}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1302960459.0991321, "message": "@psytek Infrared would be a stealthy option, were it not for camera phones & security cameras, & such... Still cool, since LEDs emit a focused beam.", "group_id": 868, "id": 710568}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1302960657.6199651, "message": "Mean if we had a shorter alphabet (keep hitting \"send\" accidentally)", "group_id": 868, "id": 710577}, {"user_id": 4430, "stars": [], "topic_id": 19787, "date_created": 1302984467.9983101, "message": "I was thinking about a rotary mirror (I think I took one off a laser printer a while back, may still be around), for the vertical scan, then a mirror mounted to a piezo element for the horizontal.  I think laser diodes take 2us to switch, so take that into account for max resolution and timing.", "group_id": 868, "id": 713285}, {"user_id": 4430, "stars": [], "topic_id": 19787, "date_created": 1302984480.6399281, "message": "can you say \"bat signal\"?", "group_id": 868, "id": 713286}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1302987655.9043241, "message": "Yeah, its totally a bat signal :)", "group_id": 868, "id": 713463}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1302991539.7467599, "message": "Can even have it auto track and project onto surfaces that move / such as a visor in a car or your friend's hand :)", "group_id": 868, "id": 713664}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1303245560.5614071, "message": "http://www.luberth.com/help/Mechanically_scanned_laser_display_microchip_pic/Mechanically_scanned_laser_display_microchip_pic.htm", "group_id": 868, "id": 746735}, {"user_id": 6139, "stars": [], "topic_id": 19787, "date_created": 1303263817.8687611, "message": "Love the public projection stuff...GRL has alot of cool things in that dept - http://graffitiresearchlab.com", "group_id": 868, "id": 749618}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1303270716.904912, "message": "http://www.dealextreme.com/p/6mm-5mw-red-laser-module-3-5-4-5v-13378", "group_id": 868, "id": 751218}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1303270300.2612641, "message": "We came up with a good method to do this at tonight's meeting.  Simply create an array of laser diodes on a circuit board.  It will operate exactly like an LED scrolling sign!", "group_id": 868, "id": 751101}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1303270647.819031, "message": "Hmm, pricing out laser diodes http://www.wholesaleforeveryone.com/category/laser-diodes-single-piece/EXLM735.html?utm_source=googleps&utm_medium=Google%2BProducts&utm_campaign=Google%2BProducts=googleps  looking for something under $1", "group_id": 868, "id": 751191}, {"user_id": 30460, "stars": [], "topic_id": 19787, "date_created": 1303330204.0971351, "message": "@psytek 8 Mirrors correspond to 8 vertical display positions.  I'm a little uncertain how the horizontal spread is accomplished.  I guess you hit the mirror at different points in its rotation, to achieve horizontal spread.  I suppose this means you must calculate the distance to target...", "group_id": 868, "id": 760704}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1303337107.0491271, "message": "1 of the benefits of lasers is always being in focus - it would be a shame to lose that. How about laser-cutting some precise mirroring devices (mirrored plexiglas?), to fit calculations, rather than letting calculations determine form?", "group_id": 868, "id": 762088}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1303343950.2246699, "message": "What about a small LCD screen, w/backing removed, and a laser through that? Would  polarized LCD glass be good or bad for focus?", "group_id": 868, "id": 763082}, {"user_id": 4430, "stars": [], "topic_id": 19787, "date_created": 1303344244.4632511, "message": "There would need to be a curved screen or a lens, or the image would distort", "group_id": 868, "id": 763131}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1303347633.6982269, "message": "Hmm.. Could it be collimated w/2 opposing lenses, surrounding LCD? Laser would have to be stronger, as beam would be wider. Green would be the best choice, for safety & visibility, but would draw more current & possibly overheat...", "group_id": 868, "id": 763733}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1303351778.153291, "message": "no need for mirrors or motors just an array of lasers 100 or so of them, shift registers, can use the same code we use at the lab.  Plexiglass will be good, we can cut a bunch of circles and glue in the lasers.  If its flexible enough we could bend the plexi a bit and make the scroller bigger or smaller too.", "group_id": 868, "id": 764461}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1303882256.045403, "message": "If this could be AC-powered & cooled, current kept consistent, shock-resistant, I think Green's the obvious choice. Red makes more sense in price. Other colors don't really present a viable alternative, except IR, for \"invisible\" writing.", "group_id": 868, "id": 822269}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1304118081.968457, "message": "+1 for green", "group_id": 868, "id": 864829}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1304171212.29916, "message": "Lasers are so damn delicate. Maybe a red prototype would be a good idea, price-wise.", "group_id": 868, "id": 868107}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1304197978.200089, "message": "I'm thinking we could use 140 to 200 diodes", "group_id": 868, "id": 872075}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1304197770.8987789, "message": "Over 10 and they are $0.90 each.  Anyone else want to chip in for this project?", "group_id": 868, "id": 872026}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1304699975.512455, "message": "Check this out on DealExtreme: http://www.dealextreme.com/p/air-message-usb-programmable-led-message-display-stick-2-aa-16514", "group_id": 868, "id": 943908}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1304734886.480185, "message": "Thats cool, just a pov though", "group_id": 868, "id": 948346}, {"user_id": 4330, "stars": [], "topic_id": 19787, "date_created": 1304742550.202724, "message": "Yeah, but nice looking. At least in pictures.", "group_id": 868, "id": 948805}, {"user_id": 3019, "stars": [], "topic_id": 19787, "date_created": 1305843579.9105351, "message": "Ours will be solid state.", "group_id": 868, "id": 1117341}]