Automatic Electronic Cinema Screen

[Guest]

Oops and also has a voltage free switch inbuilt so you wont need another psu.

Timers to also limit the screen drop and rise.

Did i mention remote control?

[Guest]

Read this:

http://www.avforums.com/forums/showthread.php?t=217749

Something to do with the resistance in the coil.

Not with what i just supplied you with.

[Red Fox UK]

Not with what i just supplied you with.

What did you provide me with exactly? The switch is not voltage free, the current switching takes place at it - as with your house lights.

[james.wilson]

you 12v source is obviously low current, inore your 4.7 K thing.

You need a transitorised relay or t relay. TK make one as do castle etc. You will then use the contacts from this to driver your 12v coil 240v contact relay. I would advise you fit a timer to both postions though after switch over as its not a good idea to rely on your safety cutout, and driver permanently

James

If you need and you let me know what the source is coming from ill do you a diagram

Last time i did this was to make the screen work off a fob, so i guess thats what your trying, or is it off the projector

[Red Fox UK]

Its off the trigger the Projector provides when switched on.

[arfur mo]

Yikes - they do loads of relays according to the website; not sure what Im looking for to be honest.

I do know that some require an additional 12v power supply as 4.7kilohms wont trip it, hoping to find one where I dont need anything other than the 12v 4.7kilohms trigger.

ADI - Gardiner Security, or most security stockists, ask for a 'Handy Relay' fitted with the larger cased relay.

regs

alan

[Alarm Co]

maybe some help ??

we use a company called jlc automation they manufacture relay cards

we mainly use them to send signal from fire panel to open aov

window motors

www.jlcautomation.co.uk

can they help you?

[Red Fox UK]

Thanks for the replies, obviously got plenty of reading to do

[james.wilson]

See above sorry about quality of the diagram

[Red Fox UK]

Thanks, I can buy a relay board that will do that - but what I am trying to is achieve the same thing without having to use the 12v PSU.