I'm in the process of doing some work in my loft - boarding it and opening up the loft hatch so it's much bigger.
Hatch was been made bigger today, it's massive and maybe a bit too big (nj). Gone from 35cm x 51cm to 78cm x 90cm.
I'm trying to figure out the best way to work the ladders and hatch. Motorised ladders cost an absolute fortune so I'll be going for some regular loft ladders. But a motorised hatch door seems like a reasonable possibility. The hatch will be over 3m high so that's why I like the idea of it being motorised.
I'm thinking an arduino, a motor and 433 MHz receiver (plus 433Mhz 2 button remote).
The door will be opening inwards into the attic, rather than down into the landing space. It will also be able to fall against the wall next to it, rather than open to 180 degrees flat.
Something like:
Code:
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/|
Door / | Wall
/ |
/ |
__________/ |
What would be the best sort of motor for this sort of thing? A stepper motor so I can move it a specific distance?
The hatch door will be made out of MDF and will probably be a decent weight.
A simple case of having string/rope attached to the door and winding/unwinding it around a spool?
But with it going past 90 degrees that means I'd need something to get it past the 90 degree point to shut it. That might be difficult to do all that without it slamming and/or putting a huge strain on the motor.
Or I put something in place to prevent it going past 90 degrees and maybe have an electromagnet to hold it open.
Code:
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| |
Door|__ Post| Wall
| | |
| | |
__________|__|____|
Or I just get a really long post to push it open (yj). |
