[ssf] Fwd: [bicycology] FW: pedalpower / backpack cinema
ecobully at aktivix.org
ecobully at aktivix.org
Wed Mar 21 16:22:40 GMT 2007
----- Forwarded message from Liz Snook <lizthesnookcocker at hotmail.com> -----
Date: Wed, 14 Mar 2007 17:54:45 +0000
From: Liz Snook <lizthesnookcocker at hotmail.com>
Reply-To: bicycology at lists.riseup.net, Liz Snook
<lizthesnookcocker at hotmail.com>
Subject: [bicycology] FW: pedalpower / backpack cinema
To: bicycology at lists.riseup.net
>From: Ben <the.rampart at gmail.com>
>To: imc-video at lists.indymedia.org, socialcentrenetwork at lists.riseup.net,
>"uk indymedia video subgroup list <imc-uk-video at lists.indymedia.org>
><imc-uk-video at lists.indymedia.org>" <imc-uk-video at lists.indymedia.org>
>Subject: pedalpower / backpack cinema
>Date: Wed, 14 Mar 2007 17:48:32 +0000
>Please forward this to anyone who may be interested...
>A projector costing under 400 pounds new (including VAT) is now available
>that runs on 12 volts and uses white LED 'bulbs'. Unlike a normal
>projector, the bulb will last for tens of thousands of hours and not cost
>several hundred pounds to replace. This makes it a tempting proposition on
>it's own but more importantly is it's extremely low energy consumption,
>under two amps!
>One person can easily generate the power to run this projector with a
>simply pedal power generator. Alternatively, it is such low power that a
>small battery capable of providing several hours of viewing could easily
>be carried in a backpack with the projector and toped up during the day
>with lightweight solar panels if required.
>The LED light source will not be damaged by getting knocked about while
>hot which has always been a major issue with normal projectors.
>The model is a Toshiba TDP FF1 LED Projector costing £ 394.47 (inc. VAT.)
>Here are the important specs...
>Resolution is SVGA 800x600 (fine for any application)
>Contrast Ratio: 1500:1 (this is good)
>Brightness (ANSI): 400 lux (this is low, not good)
>Life of Lamp: over 10,000h (amazing, more than enough)
>Fixed Zoom - Projection Distance (m): 0.4 - 2.5 m(1.31-8.2ft) (limiting
>in some applications)
>Picture Size (Diagonal): 0.27-1.72m(11.0 - 68") (not huge but enough)
>Weight: 565g(w/o Battery)
>Power Source: DC 15V (perfect ;-)
>Power Consumption (W): 18W (tiny! 1/10th of a typical small projector)
>Lets be clear, it is NOT very bright but it is very quiet and economical.
>The fixed zoom might be annoying in some applications but that's true of
>many cheap projectors these days.
>Anyone thinking of purchasing a projector for communal projects might want
>to think about this...
>It is probably NOT a good projector for general use in large rooms with
>poor blackout in social centres. It MIGHT make a good loan projector
>dispite it's limitations as it should be harder to damage than normal
>projectors. It is NOT a good projector for trying to splash a huge screen
>full of propaganda onto the walls of corporate headquarters from the back
>of a bike - it is far to dim. It IS a good projector for bike tours, small
>dedicated cinema rooms, gimmicks yet to be considered and off grid
>missionary expeditions ;-)
>The power consumption is a tenth of that of a typical small projector and
>lower than many laptops so you can guess how long a battery would last. A
>typical 7 amp hr lead get battery used in burglar alarms etc should last
>for about 4 hours. One person pedaling could generate three times the
>required power comfortably so could actually power both the projector and
>the video source and the audio. This makes pedal powered cinema a piece of
>cake compared to what we used to do. No heavy batteries, no need for four
>people to pedal all the time. Joy!
>Next we need somebody to invent a pocket blackout tent.
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