Dimming a Data Projector

[Adam Brinkworth]

Does anybody know of a way to dim the bulb of a standard data projector, or if there is a projecter avaliable that has this facility built in. Prefrebly I would like to be able to dim over DMX. Budget for the projector will be around 3000 - 4000 GBP

 

I have dimmer racks avaliable if they are nessisary.

 

Thanks

[Bryson]

You can't dim the projector lamp itself. What you can do is use a shutter. See This thread for details. Or, you could put a scroller with different grades of ND in the way. I have some of the custom scrolls made for this very purpose.

[dunk_1984]

If you don't need to do it instantaneously or frequently you could just alter the brightness of the projector using the onboard menus... I don't know if this is suitable for purpose but my free suggestion

[Al Cain]

No option to dim the projector, unless you have some stupidy expensive projector or software!! otherwise the only option is to build some sort of shutter...

 

HTH

Alex

[Ynot]

Does anybody know of a way to dim the bulb of a standard data projector,

PM sent re DMX shutter.

[eviljohn2]

I guess it depends on why you need to dim the projector (which can't really be done as mentioned above). You could potentially get a cheap vision mixer or similar and manually fade through to black though which may give the effect you want although you'll still get a dark greyish output on your screen surface. ;)

[Adam Brinkworth]

Thanks for the help. Im going to look into using a video mixer to dim the projector. If I cross the source over to a blank black screen, I should be able to achive these results.

[Bryson]

Remain aware that if you use that method and you have a blackout, that there will be a "grey square" to contend with.

[JimWebber]

Unless the fade is followed by a judicious (sp) use of Ynot's shutter?

 

Jim

 

PS I've used the mandraulic version using a CD case before now...