Automatic window for cat 3D for print


 Automatic window for cat  3d model for 3d printers

 Automatic window for cat  3d model for 3d printers
 Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers Automatic window for cat  3d model for 3d printers
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Designer

Monique de Wilt

3d model description

My cat likes to wander around in the garden. But now winter is coming it is to cold to keep my window open for the cat. So i used an arduino to open t...he window when the cat jumps on table indoor or on the windowsill outdoors
My window spans two floors which was a big advantage in this case. The window cannot open far enough for any intruder to go in and i could install the steppermoter on the second floor where it is out of the way.

I installed the stepper motor upstairs and attached it with only one screw so it can rotate a bit. This is neccesary because the window frame doesn't move along a line but along a curve. It also enables you to move the threaded rod out off the nutholder so you can manually open and close the window.

To attach the threaded rod to the axis of the stepper you'll need couplings. My Stepper motor has a pulley fixed on it so i had to use the couplings that i also uploaded. For a normal stepper motor you can find lots of couplings by searching for Z coupling on Thingiverse.

I used a lasercutter to cut the nutholderpieces from 5mm birch plywood. I drilled a little hole in the top so i could use a pin to keep the threaded rod inside the nutholder. If i want to manually open the window i can take the pin out and move the threaded rod out of the nutholder.

Now you have a motor that can open and close a window. Next thing is the electronics to control the motor. I used an Arduino uno with a shield that allowed me to connect a steppermotor, 2 sensors ,a 12v powersupply, some leds and a stepper motor driver. I made the shield from a piece of prototyping board

You can find the schematics and the code for the uno in the documents.

To connect the pir motion sensors to the shield i used an old network cable, it has 8 threads of which i only needed 6.


3d model print parameters

Nema 17 stepper motor
z-coupling
M8 threaded rod
M8 nut
Nutholder
Screws
cables and connectors
Arduino Uno
prototyping board (e.g. ROTH RE315-...HP)
leds
resistors (~220 Ohm)
female headers 2.54mm
male headers 2.54mm
stepperdriver
pir motion sensors
casings for pir sensors and arduino
12v dc powersupply

tools:
screwdriver
solder iron
crimp tool
lasercutter
3d printer


Tags

Cat.home automation.window.arduino.pir sensor

License

CC Atribution

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