![]() ![]() The sensor and wire is simply taped to the Plexiglas. I had to use thin, very flexible wire otherwise the rigidity of it would push the flap off center. I did not want to put magnets on the door because that would make it heavier, so instead I put the switch on the door and the magnets in the door post. The main reasons for choosing a Hall effect sensor were that it does not add friction, it can be covered entirely, and I also was just curious how they work. There are other solutions possible, such as mechanical/optical rotary encoders, contact sensors, beam break sensors. within the range that closing the locks makes sense. The Hall effect sensor is for detecting whether the door is in the center, i.e. In the next steps the mechanical parts and each of the modules will be discussed in detail. One of the pictures here shows the basic plan with the modules connected to the Arduino (the electronics). ![]() The system comprises several 'modules' (solenoids, RF reader, and so on). Rubber isolation strip or other soft material for padding the edges of the door and door post Hookup wire, including about 27" extra thin (26 AWG or thinner) One 6" x 9" piece of 1/8" thick Plexiglas and perhaps another piece of about 6" x 3" to mount the locks One hinge (one that moves easily but without much lateral movement, for precision) One or more magnets to activate Hall-effect sensor over a range of about 2cm Two 12V electronic cabinet locks ( Nordson electronic). About 86 feet of 24 gauge magnet wire (longer than the piece shown in the photograph) RF tag (I used these 35mm disc shaped ones) To use the custom made antenna discussed here, you need a reader that allows connecting an external antenna) 5V RF reader module ( Seeed Studio 125Khz UART or equivalent. It is not further discussed in this Instructable however. The electronics are shown without enclosure, but it is advised to put an enclosure around the electronic parts once you're done. Make sure that the edges of the door and the doorway are padded with soft material for when the tail gets caught! A few painful experiences may be enough to make the cat never want to go in there again. Most animals will quickly learn to push the flap in response to the click (lock) and the light. Going from the inside out, an infrared proximity sensor detects the presence of an animal if within about 10 inches and unlocks the door. Flap falls back, activates Hall effect sensor, and the door locksħ. Timer ensures that door stays unlocked long enough to give cat a chance to respondĦ. Cat walks up to the gate, RF tag gets read within about 4 inchesĤ. In the beginning the door is locked, cat is outsideĢ. Let us admire your project photos by using the tag #DIYDreamingWithLia on Instagram and you could be featured on our page! Head over to our membership page to join our crafting community and receive inspiration for the next 12 months.RFID door (entering) from champenoise on Vimeo.ġ. We love getting you in on the creative process, so connect with us! Share your project ideas and requests in the comments below, or follow us on Instagram, Facebook and Twitter for daily inspiration. To see some of the other wondrous projects you can make out of this magical material, find all of our projects here. Make sure that you are punching a hole at the top before you bake them! Get Inspired! The colors on the tags look pastel when printed, but they will become much more vibrant after you bake them. And to be as thorough as possible, there are also designs for both shorter pet names and longer pet names! Print directly onto the shrink film and then cut with sharp scissors. To add some cute variation to our DIY pet tags, we also cut some of them with a scalloped punch. You will also find versions of each with space for just a name, or space for both a name and phone number. As you see in the download, there are two shapes of the pet tags, a bone and a circle. Before editing the names, download and install the free fonts Tulia and Grand Hotel. There are two font options, a slab font and a script font. Pull the tags out of the oven and use a book to flatten out the tags as they cool.Bake the tag according to the package instructions.Use the hole punch to create a hole at the top of the tag.Print onto shrink film and trim the designs.Edit the ID tag with your pet’s name and your phone number.Download the corresponding font (listed below).Download the PDF below and choose your favorite design.They are so easy to make with just some shrink film! Our designer Krista created a bunch of different design options, so choose your favorite and get to customizing. Next in our collection of DIYs for pets are these DIY pet tags.
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