Distinguishing Pet Bowl





Introduction: Distinguishing Pet Bowl

This pet bowl opens when the animal with the receiver approaches it and stays closed for all other animals.

Step 1: Circuitry Used

I was asked to make a "special" pet bowl by a friend. She has two cats. one is over weight and eats anything left out and the other is too thin and would eat more if the food was available all the time. So, I made a bowl that will only open for the skinny cat.

This is a luggage alarm. You're supposed to put the little fob in your luggage and keep the big receiver. The receiver will vibrate and beep if your luggage gets a certain distance away from you

Step 2: Circuity Used

Since this system uses about an amp it needs to be plugged in instead of battery use. So, there's a 6V regulator. Two SPDT relays are also used as seen in the diagram.

And, since batteries aren't used it's a perfect spot to put the luggage receiver so I can get tothe sensitvity adjustmen without taking the bowl apart.

Step 3: Schematic



    • Pocket-Sized Contest

      Pocket-Sized Contest
    • Pro Tips Challenge

      Pro Tips Challenge
    • Paper Contest 2018

      Paper Contest 2018

    We have a be nice policy.
    Please be positive and constructive.




    Do you have a patent on it?

    Brilliant! How about putting the un-modified bowl on something tall so the fat cat can't get to it and has motivation to keep exercising? HAHA

    Nice! I was about to start one of these with rfid when I came across this one. How do you find the tag, does it still work if it gets wet? That was my main reason for wanting rfid as well as the fact there easy to replace if they get lost. Does anyone know how these luggage alarms work, does each unit have a unique code or frequency?

    I see there's 2 relays in there, are they 5v? Are they set to normally open or normally closed?

    Sorry I'm new to all this so I'm probably missing something, but why do we need the dc regulator, the bowl is powered by 6v dc (4 AA battery's) and the dc regulator is outputting 6v dc?

    How long do the batteries last in the little tag?

    Hi - great project. Is there an easy way to reverse the effect? meaning, have the dish close when the sensor gets close? And did the luggage alarm allow you to change the distance to which the lid triggered? Thanks!

    Has anyone got this to work? I have followed the instructions, using the same type if luggage finders and have no luck.

    Please help.

     I have three cats, one seems to be eating everything and gaining to much weight.  I would need to make three of these, if I use the lugggage alarm will they all read the same?  Can an RFID kit be used instead?

    Can the lid be forced open or lifted manually? My kittie is to smart forher own good. She opens all the doors in our house. Luckily except thefront door. But only because she cant do the dead bolt lol. She evenopens the door into the garage, waits for the other animals to go in,then cries at the door so someone notices its open. Then the humancloses it locking her poor victim in the garage. Luckily we've learnedher schemes.

     Yes! They *can* be forced open. Thankfully, our "smart" cat is the one who has access. We're hoping the other one doesn't figure it out!

    how does your cat open the doors? are they handeled doors, or knobs?