This is one of the Arduino projects I am going to try out - it goes very well together with out already RFID enabled catflap (see elsewhere on this blog for more):
Some people love to keep cats as their pet. However, unlike the dogs, cats didn’t like to stay at home and its like to wandering all around the neighborhood. Sometimes, you’re very hard to track its trace, as it can walk up to several kilometers away per day!
If you’re one of the cat owners and would like to keep your eyes on its, maybe this CATaLOG project is what you’ve looking for…
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