petmate medium cat door
1 arduino Duemilanove microcontroller
1 Sensor Shield add-on card for Arduino Duemilanove board
2 Infrared PIR Motion sensor modules
1 Digital Servo
whatever that is... I assume it'll do the job
these are handy, but not really necessary. I have one of those and find that I don't really use it. if you want to save money, don't buy this. you don't need it. (if you do buy it, it does make things a bit easier for beginners)
I have no experience with PIR sensors - however depending on the brand they can be a bit complex. I would advice to get something like a twig by seedstudiohttp://www.seeedstudio.com/depot/twig-pir-motion-sensor-p-802.htmlI have very good experience with the active IR sensors that Phidgits sells (like this one: http://www.seeedstudio.com/depot/twig-pir-motion-sensor-p-802.html) however, while they are very easy to use, they may go haywhire in sunlight.
yep. but. how will the servo move the door? its sometimes not that easy getting the motion which you want out of a motor.If I where you, I would take apart an old CD drive. You might be able to use its eject mechanism to build a sliding door.
Yep. And a breadboard.Hope this is of some help. if not feel free to ask specific questions. Also post links to the products you are considering. A servo can mean all kind of things and so can a PIR module. If we know specifically what you are considering, then we can give you real advice.Cheersp.(oh and look into RFID. You might not want to use IR, but an RFID chip to activate the door. That way you can prevent squirrels or snow or leaves from activating your door.)
What about non-psychic felines?
Quotenot helpfulNo but funny.
grumpy_mike: 1marquita: 0:-D
I'll be back with a usefull post a little later in the day ok?
Servos can be very accurate, but also very expensive
ok, so you think a twigs would work better than Parallax PIR Sensors? and how do you connect these to the arduino?
OK, how would you use the CD drive? i have a bunch of these laying around.
Yep. And a breadboard.
how do you program the arduino to do what you want it to do?
do i need a PC to use it?
ok, i forgot to tell you that the door is for the litter box, not outside. because my cats stay indoors.
Well, I often find it a bit tricky translating the motion of a servo to linear motion. Linear servos exist, but are quite expensive. You could also use a mechanical solution like in the video you posted.I was thinking this: You know how CD-Drives cen slide the tray in and out? Well basically that can be your door. Open the chassis of the cd-drive. In it you will find several small motors. One of them is sort of skinny and long (though this may be different between brands) and is connected to a drive system which opens and closes the CD Drive on the click of a button. Find yourself a motor shiled (google - there are tons) and connect the red and black leads which go to the motor you are interested to it. (I dont know what voltage they require - I would probably just try it with the Arduino set to 3.3V)Alternatly you could also try to hack the pushbotton which activates the motor.Then again, if you are not that into tinkering with electronics, maybe the mechanical motion translation is simpler for you. I dont know. I personally would start with the CD-Drive, and try to work from there.
what I am saying is:*if* you want a sliding door, you can either buy a 90$ motor, or use a sliding mechanism which you already have. Your hard drive slides open and close. thats the door opening and closing. so you replace the cd-tray with a "door" and mount it in your wall. You find the electricity leads going to your motor, and connect them to a arduino motor-shield.That way you save yourself a lot of money, and possibly time as well.Open up your cd-drive and take a look. I dont have time to write you a step by step. It all depends upon how experimental it is, and what your preferred approach is. Maybe my Idea doesnt work for you. Its just a suggestion.cheersp.Edit: Yeah. You get the idea. You can do exactly what they did in that video, just instead of an iron rod, you will be moving the door for your cat.But its just a suggestion. There are many ways to do it.
post a picture. maybe I or someone else here can figure it out.