n_kuhlman Posted January 22, 2016 Posted January 22, 2016 Has anyone had any success in cutting power to the lamp only of a video projector? Need to keep the fans on, and avoid the entire reboot cycle. Otherwise, the lamp continues to cast a glow, which is noticeable especially in a dark room. We have all sorts of improvised fixes based mainly on a mechanically operated shutter, usually made out of cardboard. Does anyone make a projector that can do this, to y'alls best knowledge? And, since I'm hunting unicorns already, anyone have a solution that can be communicated with via DMX512?
Modge Posted January 22, 2016 Posted January 22, 2016 The search term you require is "Dowser". Armed with that search term I found this for you: https://www.christiedigital.com/en-us/business/products/projectors/lcd-display/christie-LX700 Which vaguely rings a bell as something I've worked with on corporate jobs (however I am a lampie and don't always take notes on these things...)
n_kuhlman Posted January 22, 2016 Author Posted January 22, 2016 The search term you require is "Dowser". Armed with that search term I found this for you: https://www.christie.../christie-LX700 Which vaguely rings a bell as something I've worked with on corporate jobs (however I am a lampie and don't always take notes on these things...) Thank you.
vinntec Posted January 22, 2016 Posted January 22, 2016 Strictly speaking it is a douser (a dowser is someone who searches for water). However I believe it is commonly spelled as dowser (meaning to extinguish) especially over the pond. Sorry my last career was as a teacher! One our technicians has made a DMX device with a stepper motor to douse our projector, which he calls an ArdDowse (as you can see he also mispells it!) It has a fixed address and only two states, but that's all we needed. He does electronics for a living so won't give one away but I can put you in touch if you are interested to explore the options - if so PM me an email address?City Theatrical make a commercial one, http://www.citytheatrical.com/Products/projector-dowser?dept=e71ecae2-cd2e-49f8-9565-f6a61de65f48, you can lookup the price yourself. There's also a thing called a flapper http://response-box.com/gear/video-projector-shutters/shutter-1/, so there are devices out there so it is worth doing a search, particularly in your own country. We would love a better projector but the example provided is about £6,000 to purchase or £500 to hire for a week. The lamp is also several hundred pounds to replace. (prices in UK pounds of course).
Ynot Posted January 22, 2016 Posted January 22, 2016 "DMX Shutter" is a topic often discussed here, and with a bit of thought and a few parts from CPC or other supplier you can build your own for not too many coins...
alistermorton Posted January 22, 2016 Posted January 22, 2016 We have a number of dousers/shutters which we knocked up ourselves from a r/c servo and an easily available DMX servo control board - try Milford for a start. Put a nice paddle on the servo made from matt material and swing it into place under lighting desk control.
Jivemaster Posted January 22, 2016 Posted January 22, 2016 The douser is just a black opaque flag that can be worked with most things from a "bit of string" to wires to a DC motor or wires from computer to computer (aka DMX )
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