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Dimming a Data Projector


Adam Brinkworth

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Posted

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

Posted
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.
Posted
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
Posted

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

Posted
Does anybody know of a way to dim the bulb of a standard data projector,
PM sent re DMX shutter.
Posted
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. ;)
Posted
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.
Posted
Remain aware that if you use that method and you have a blackout, that there will be a "grey square" to contend with.
Posted

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...

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