I wanted a reading room, cinema room and family room. To put a projector in any of these rooms normally dominates the whole room. So I set about to build DIY system that hides the projector completely when not in use. I did not have the option of a roof space projector screen so I came up with a design that would hide it on top of a book case.
The whole build was relatively cheap, i.e I spent no more than £400 for the bookcases, screen and gear.
Please excuse the clock noise, I like it and it does not bother me when the film starts
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Very nicely done! I liked how the lights automatically turned off in the bookcase as the screen was lowered.
Thanks for sharing!
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Great job!
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Very cool!
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Really amazing!! Details please....
In particular, what gadgets did you use?
I'm particularly looking for a gang of relays, to do simple on off lighting, like five relays.
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THAT, is awesome, love it!!
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Thanks, you will probably not like the details as much.
I'm using a couple of zigbee (sonoff) relay switches. For the screen, it had it's own control box with a pendant control switch.
The pendant is a live, live, neutral for up and down so I cut the pendant off and wired it to a 240V DPDT relay which is then wired to a sonoff relay (the sonoff only switches live, so can only switch 240VAC not DC.)
The actuator to control the slides is 12VDC, I used the another DPDT relay and another sonoff.
The diagram shows this better, sorry for the non precise schematic, its late.
I think all the bits were like £30. I would like to put this down that each relay is insulated in separate plastic boxes.
For extra safety, I have all the power routed through a salus power plug. My program energises the salus and a second later all the automation of the relays happen, then after 3 minutes shuts the power off.
For feedback I have placed a zigbee contact sensor on the closed position to of the front panel and one on the screen, this ensures the program does not initiate to the next step until a sequence is complete. Even then I put in some serious delays in case something goes wrong.
I'm unsure if this fits your bill, I looked at fibaro and various other relay drivers. They all seem quite expensive for what they are, but then again I do get drop outs on the sonoff occasionally and have to pair them again.
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@northan
Brilliant job!
What did you use for the linear actuator?
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I think I got all my bits off Amazon.
Hang on, i will send links on the bits
https://www.amazon.co.uk/gp/product/B00BG61L6E/ref=ppx_yo_dt_b_asin_title_o09_s01?ie=UTF8&psc=1
https://www.amazon.co.uk/gp/product/B07DXS8DBJ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
The actuator is noisy, but what do you expect for £20 lol
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