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?

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.

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.

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

Its off the trigger the Projector provides when switched on.

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

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?

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

See above sorry about quality of the diagram

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.