What’s cooler than a door that irises open and closed? Not much. They add a nice science-fictiony detail to any entryway. [Zposner]’s dad wanted an automatic door for his chicken coop, so [zposner] took some time and came up with a nice door for him with an iris mechanism. You’ll need to watch the video.
[Zposner] used a combination of laser cutting and a CNC router to cut the pieces, then sanded and painted the wood. After assembly, [zposner] started work on the control mechanism. He’s controlling the door with an Arduino and a motor shield; to let the Arduino know to stop the motor, [zposner] used limit switches which get hit as the mechanism rotates. Once the switches were in the right place and the code written, it was time to finish assembly and install the door on the coop. To keep the Arduino that safe, it was installed in a plastic container with a screw lid, and then hot-glued to beside the iris.
Unfortunately, chickens don’t necessarily care how cool something is, and in this case, they didn’t realize that the iris was a door – they refused to exit the coop through it. [Zposner] tried a few things before settling on putting the chicken on the edge of the door – then the chicken would realize that it could go through it.
[Zposner]’s dad now has a snazzy door that opens with a switch. It was a great project for [zposner] and his dad to work on and, even if the chickens seem unimpressed, they did a great job. Check out the iris porthole that a Detroit Hackerspace built into its door, or, if you really want to build an iris mechanism, but don’t have access to a CNC router, a laser cutter, or, you know, wood, you could build this out of bits you have lying around.
How does it avoid decapitating chickens?
Never mind that. Sell it to a chicken slaughterhouse and profit.
Easy, by making them wear stiff bow ties.
:o)
Say what you will but that is one dapper chicken.
You can see that the video is sped up.
This thing might be slow enough to move out of the way before being stuck.
“How”? His dad presses the button once all the chickens are back in the coop. Presumably he’d watch out for them.
Looks more like some kind of chicken halving device.
How does it detect that a chicken is actually not in the door before closing?
The creator said something about natural selection
That just means you eat chicken for dinner. Hopefully it was a rooster.
While chooks are not exactly bright, they are smart enough to notice a door closing around them and move out of the way.
So do the chickens have a GDO? How do you keep Jaffa out?
Well, Jaffa can’t fit through the gate. Solves most problems involving malevolent entities, actually.
But then that one time a Goa’uld serpent crawled through…
Going to have to retrofit those chickens with RFID GDOs! Now, what to do about ducks with particle accelerators…
Gettin slower [HAD]. I saw this yesterday via the Instructables newsletter.
With a DPDT switch to open/close the iris he could have avoided the Arduino. You just need the DPDT switch and the two limit switches.
Why stop there — you could remove the servo and electrics by using a cord. Kinda not the point – you don’t want to have to be out at the appointed times to open and close the door. The one night you’re out with friends and return home late will be the night a predator ravaged your flock. Yes, as presented, this project is triggered by a switch. However, the controller can be programmatically updated for deciding when to open and close. Making a state machine to periodically monitor an LDR (or even use an RTC, which I personally feel is silly and just one more thing that could go wrong) upgrades this from manually switched to fully automatic.
My own coop door controllers (I’ve designed and constructed a couple) are ATTiny based, use an LDR, and drive a DC motor to open and close a galvanized sheet “guillotine” style shutter door.
Cool is, well, cool. Reliability is important though. Over time the more likely some cruft from dustbaths and cobwebs and other gunk will find its way into a gear portion of it and bugger it up (either by jamming, or leading to wear). That’s why a simple counterweighted guillotine-type shutter door riding in a slot with sufficient play is about as straightforward as it gets for reliability. The first few weeks after you construct a project like this, you’re going to be out checking it all the time and thinking “I..am..awesome!”. Outside of gross design and assembly issues, it should be quite reliable in the beginning – it’ll be sometime after you’re not checking out your coolness that it faults because something is no longer in tolerances.
As to the raised concern about power – since THIS project at this stage clearly uses a toggle switch right on the project, it should be obvious power is out. I however run mine off of solar charged LiIon – plenty of reserve power to run an extended period of time without sun (remember, it should only need to drive the motor for a short period of time twice a day), but I have a barrel jack for a wallwart if I’d rather. Low power sleep mode is your friend when running off of battery.
this could have been so much easier…. blabla… overkill… blabla… 555… why arduino,.. does it user GPS to get the time or anESP to connect it to the internet… WHO CARES! This is a great project. It screams overkill on every step of the build and therefore i can only say:
I LOVE IT!!
Cool project, seriously!
Add a light sensor to open at dawn and close after dark and there’s no worries about decapitating the chickens. That’s when you want to open and close the door anyway.
I built my own automatic chicken coop door opener/closer using an arduino, motor and a all-thread rod as the door sliding mechanism. Unfortunately a chicken coop is not a clean environment and what worked great in the shop shortly gummed up and stopped working in place. I’ll get back to fixing it at some point – right now it’s just as easy to go out manually open and close the door.
What’s cooler than a door that irises open and closed?
The impenetrable Krell door from Forbidden Planet…
Love that movie! :-)
It would have been nice seeing the guts side of it. As it is it is a stupid waste of time.
Did you not click the link?
http://www.instructables.com/id/Mechanical-Iris-Door/
Actually, I wouldn’t blame you for not opening an Instructables page; I keep getting fake “you won the prize!” phishing scam redirects. :/
Get your act together Instructables! Remove the stupid “share” bar that is hijacked constantly.
If you wanted to automate this and assure that no predator enters with the chicken you’d use video recognition set to detect “chickeness” and exclude “raccooness”. Speed up the door action a hundred-fold and use a piston to launch the chicken at high speed through the rapid open and closing of the aperture.
Don’t forget to exclude foxes, rats, and weasels!
Chicken coop helps a chicken to just get into their own home. No other animal can enter inside their own home. Chicken Electronic door helps your chicken to move in and out freely.
This Electronic Chicken Door helps your chicken to be healthy.
Thank you.