I like it how you also protect the cats privacy. nice

@nick5625

5 жыл бұрын

you could probably get his address and phone number with the tag code ...

@Iceteavanill

5 жыл бұрын

@@nick5625 yes but I think it is a nice detail to blur out the number and posting it online. Yeah if you really want to know it you probably can find it out but thats with mist things....

@AndreasSpiess

5 жыл бұрын

In Switzerland, it is quite easy to find an address. We have a public telephone directory ;-)

I have sold commercial readers for the cow tags for years. My customers use them in an automated data collection system to identify the NEXT cow passing through the entrance to the milking parlor. This allows the milk weight measured at each stall to be matched to the cows according to their order of entrance. The challenge for our installations is that we need to very reliably read every tag, one at a time, in order. This is made even more difficult by the rf noise produced by poorly designed and/or installed variable frequency drives used on vacuum pumps and well pumps. It always amazes me that the systems can accurately read tags >98% of the time and with some clever pattern matching algorithms that compare the milk weights measured to the expected milk weights for the cows read, the data accuracy reaches nearly 99.9%. This video was VERY interesting for me. It is cool to see how this works. I am looking forward making my own reader using this information.

@yorickhunt3371

5 жыл бұрын

Could be interesting trying to merge the two components... kzread.info/dash/bejne/eIx9lJOMZL29erg.html ;-)

@Andreas-gh6is

5 жыл бұрын

I would recommend multiple readers. Preferably one strategically placed near a feeder or an automated scratcher. Maybe even make the feeder dispense food conditionally on the reader getting a good read. I'm also working on automated ecg analysis for cows, among other animals, and that could actually be used to identify cows, too, but it's less practical.

@AndreasSpiess

5 жыл бұрын

Interesting that you used these tags. I am sure you can do some pattern recognition to increase the hit rate. If only one is lacking it is always clear which one it is, if you always have the same cows to milk. Good luck with your project!

I hope no human was harmed during this dangerous experiment

@cabe_bedlam

5 жыл бұрын

"2 hours of angry silence and a mild mauling."

@AndreasSpiess

5 жыл бұрын

Only I was hurt. Nobody else ;-)

I love Dishka! She certainly purrs up a storm :-)

@AndreasSpiess

5 жыл бұрын

Thank you! She also gets lot's of love here...

Thanks for the video! I love the idea of the round coil, where the cat goes through - I always had a sensor placed above the door in mind, not around the door - nice idea!! Keep up the interesting videos!!

@AndreasSpiess

5 жыл бұрын

The idea came with the first experiments...

I've been gathering parts for this for a while now so this a great video!

@AndreasSpiess

5 жыл бұрын

I hope it will work for you, too!

Awesome video yet again. Keep up the good work Mr Spiess

@AndreasSpiess

5 жыл бұрын

Thank you!

" . . .high voltage warning - - this one must be good!"

@AndreasSpiess

5 жыл бұрын

Of course! ;-)

Wonderful video Andreas! I love your sense of humor :-)

@AndreasSpiess

5 жыл бұрын

Thank you!

This is great Andreas! I was planning on a project to determine how much food each of two cats are eating (based on weight change), one is chipped, and the other not. I had already ordered RFID reader from AliExpress which I assume will not work because of the special LF band you mentioned, but thankfully you saved a structural engineer frustration! I am in your debt sir.

@AndreasSpiess

5 жыл бұрын

I was frustrated when I did my first video. This was the reason for that one ;-)

This was brilliant - I learned so much. Thank you Andreas!

@AndreasSpiess

3 жыл бұрын

Glad it was helpful!

This is the perfect form of cat detection! So clever! I always got stuck on this idea because i thought you had to tag the animal with some kind of RFID / BLE device around the neck.

@AndreasSpiess

5 жыл бұрын

She carries such a tag since she was young.

Been waiting for someone to upload this for a while now lol Thanks for all the useful info!

@AndreasSpiess

5 жыл бұрын

You are welcome!

Amazing Andreas! Great as usual :) Thank you

@AndreasSpiess

5 жыл бұрын

You are welcome!

I've been wanting to make a similar project for a while. This video will really help, thanks!

@AndreasSpiess

5 жыл бұрын

You are welcome!

This is great! I am plotting a sort of “Stray Station” for tracking + taking care of Stray Cats / “Community Cats” in an area, sometimes groups called “Cat Colonies”. I am thinking some method to track would be of use, and RFID (post TNR) seems great! I’ll definitely use your work and read up on this more, thanks for this!

@AndreasSpiess

8 ай бұрын

Good luck with your project!

Plus für die Kadse😻👍 Danke für diesen Beitrag, das hat mir noch gefehlt als Ansporn für unsere Katze :)

@AndreasSpiess

5 жыл бұрын

Die Katze wird nichts bauen. Der Ansporn ist vermutlich für dich ;-)

I've been meaning to do this for ages but not quite got around to it.. well done! We were early adopters of the Pet Porte RFID cat flap... interesting design... basically just a PIC doing the hard work with the coils above the animal rather than the animal passing through... i.e. the coils are at 90 degrees to the door but stick out over the top directly above the shoulder blades where chips are normally implanted. We have a creep of tortoises, all chipped,... might be fun watching them going in and out of their house. I don't intend to chip myself as I think we have somewhat different skin structure!

@AndreasSpiess

5 жыл бұрын

If you know where the chip is you might get away with a cheaper reader on a shorter distance. Would save some money.

@NivagSwerdna

5 жыл бұрын

@@AndreasSpiess Not if they position themselves. Definitely need a wide field.

The real question is, does the cat meow with a Swiss accent? ;)

@AndreasSpiess

5 жыл бұрын

Good question. Maybe somebody has an answer?

@txtigr

5 жыл бұрын

Probably. Research shows that cats only meow to humans and that both humans and cats can recognize their person/cat's meow in a crowd of meows. So if Andreas has a swiss accent, odds are Dishka does too ;)

@Culturedropout

5 жыл бұрын

@@txtigr I've heard that before, but I've seen plenty of instances where two of my cats will be in another room and meow at each other. Or one will call another one from a different room using a particular meow. Sometimes it almost sounds like speech.

@mysterythecat971

5 жыл бұрын

@@txtigr My Belle would meow at my Beauty. It was one way communication as Belle could not hear. Through the course of time lead Mystery to develop PTSD in relation to white cats.

@txtigr

5 жыл бұрын

Probably I misstated it. The study I saw said that cats do vocalize with each other, but the sounds they make with their human are different with the ones they use with each other. Our cats "talk" to each other as well as just "talking to themselves", but somehow it always is a different sound than the ones they make with me. If you want to dive deeper have a look at the US Library of Congress page www.loc.gov/rr/scitech/mysteries/catscommunicate.htmlSorry for moving this off topic, but it is a fun subject.

Another great and funny video Andreas! My experience with the neighbor''s cat is that those who are chipped (very few) and have automatic door open access on their backyards and houses also have a very short range detection systems on those RFID detectors. But great video!

@AndreasSpiess

5 жыл бұрын

Thank you!

@John_Smith__

5 жыл бұрын

@@AndreasSpiess I see the comments about feeding the neighbor's cat and quite frankly my cat brings in the all gang home some time's. I though about the RFID thing to make that entrance cat control, but his gang behave's while at my house ... so now when he "invites" his friends to lunch or a snack "hangout" in the middle of the afternoon I simply look around, count how many they are, and simply put the food there. While they behave they get a compensation. My neighbor's are actually paranoid about their cats always wanting to know were they are if they get late home. So I relax ... no problems so far.

Well done, love the video! I built a chip scanner years ago, but nobody would sell me chips for pets, not even veterinarians. I had to use immobilizer chips instead, that's the only kind I could get back then.

@AndreasSpiess

3 жыл бұрын

Interesting. Now it is much easier. But still, you have to know what you do.

Love it! And love your humour 😁 i have two cats, and one is overweight. This looks like a fun project for weight control

@AndreasSpiess

7 ай бұрын

I am not sure she will find it "fun" ;-)

And the grand winner of the best youtube video thumbnail award 2019 goes to....the man with the Swiss accent, and his Y̶e̶t̶i̶ erm...cat ( beautiful btw )

@AndreasSpiess

5 жыл бұрын

She was really mad and scared me!

Thanks! You helped me with a pet door problem I had been mulling over for a while.

@AndreasSpiess

10 ай бұрын

Glad to help. And thank you for your support!

Your cats are very handsome, I love them! Great idea on the automation for them, and I'm impressed by the implementation. Greetings from the Utah high desert.

@AndreasSpiess

5 жыл бұрын

Thank you!

Love your pointer Andreas ;)

@AndreasSpiess

5 жыл бұрын

Thank you!

It was both informative and entertainting. Thank you and wish You the best.

@AndreasSpiess

4 жыл бұрын

You are welcome!

Haha, besides informative, your videos are becomming quite funny too. Worked on a website on which vets could retrieve owners info by entering the tag of a pet that was found. This was already in 1997 when ‘chipping’ pets became populair in the Netherlands. Good memories (programming in MUMPS).

@AndreasSpiess

5 жыл бұрын

I have to adapt to the consumer needs ;-)

Great video again, also a nice scope 500 MHz. Thank you.

@AndreasSpiess

5 жыл бұрын

You are welcome! The scope was not necessary this time. Only 134kHz ;-)

You can use shorter distances with a bit of cooperation: Cats can easily learn to rub their shoulders on a reader in order to do something they want: open doors, get food, throw something. Especially with a small beep. For a while now I have been working on a framework to think about animal training by artificial intelligence, and how to teach animals more complicated stuff.

@AndreasSpiess

5 жыл бұрын

Interesting idea. We still have a Circus around here and there they have very well trained animals. So it must be possible to train them. Not yet with AI, though ;-)

Great video! its definately giving me some great ideas 💗

@AndreasSpiess

5 жыл бұрын

Thank you!

Cat diameter ≈ 100mm... Fur diameter ≈ 350mm :-P

@GarryMobi

5 жыл бұрын

Cats are a liquid, haven't you noticed? www.boredpanda.com/cats-are-liquids/

@Andreas-gh6is

5 жыл бұрын

Cats can basically get through everything that is at least as wide as their skull, sometimes even smaller. Don't ask me how, even though I'm a vet...

@AndreasSpiess

5 жыл бұрын

@Garry: Thank you for the link!

Nice Work as always 👍😄

@AndreasSpiess

5 жыл бұрын

Thank you!

I thought the tester at 9:58 was something fancy. I just stumbled across it elsewhere. A $10 LCR-T4? I'm ordering one now, because it looks like a lot of fun! And, thank you for doing all these tests. I was stumbling my way through making the same thing, and results with chips so far were poor. Looks like I'll be getting the fancy "high voltage" receiver.

@AndreasSpiess

4 жыл бұрын

These transistor testers are very good!

Thank you Andreas, very interesting my friend.

@AndreasSpiess

5 жыл бұрын

You are welcome!

Hi Andreas, good You did this. I am also playing with RFID for my cats and had the same readers on my list, but was not sure which one to try, but was about to order the third one with the high voltage. At first I played with the normal 125kHz readers - I had some of the very cheap HZ-1050 readers laying around. They also work for the 134 kHz tags, as the difference in frequency is not too far apart. You don't see anything on the output though, as decoding differs from the 125kHz tags and the chips simply is not programmed to react to that sequence. But if You take the signal directly from pin 7 of the LM358 amplifier, You can decode the ID of the animal tag. I tried it, and it works. The coil should be optimized for a better range and the voltage is too low for a real world project but in principle it works and the HZ-1050 could be completely reprogrammed as it is an ATMEGA8 and the header is exposed. Chipping of the cats is really no problen. I assisted my vetenarian when she chipped my cats. Their skin is less sensitive to pain as ours and although the needle looks frightening, they did not even react to the stitch at all (I was holding them). There wasn't even blood as the chip is placed between skin an "inner cat". Regards Frank

@AndreasSpiess

5 жыл бұрын

Good to know the trick with pin 7. Maybe someone uses it and writes the software. But I am not sure how strong these readers are. I think they are comparable with the cheaper ones.

@DDBerlin

5 жыл бұрын

No, it is not strong enough for a real world scenario. The cat"s skin reduces the distance even more, but for testing or proof of concept it works.

Very useful info. I plan on making a public kiosk to take pets to that have been found and see if they have a chip and what is the number. Then they can use that number to locate the owner. So the good samaritan can locate the owner with out having to take the pet to a vet to get scanned. And get the wayward pet back sooner.

@AndreasSpiess

3 жыл бұрын

This is done by the vets here. They have such a reader

I have three chipped orange tabbies that look very similar. I have long thought of making an RFID system that would announce their names as they passed by it. Just for the heck of it, mostly.

@AndreasSpiess

5 жыл бұрын

Nice idea. Like my last project, which says hello if I enter ma lab ;-)

What a nice video! Also thumbs up for the thumbnail image. 😂

@blackkissi

5 жыл бұрын

img.kzread.infoy89yJ1Fq-hQ/maxresdefault.jpg 😂

@AndreasSpiess

5 жыл бұрын

Thank you! She was really upset and scared me ;-)

Really nice job and sweet cats :)

@AndreasSpiess

5 жыл бұрын

Thank you!

Thanks Andreas. I have made a motorised catfflap, because one of my cats feels very vurnerable with the flap on his head. RFID was a logical next step. So I build the reader out of discrete components, driven and read by an AVR Mega. I must say that the analog side of this project, like resonance and filtering was a humbling experience. I learned a lot about this black magic side of electronics. It would be good if vets would also see this video. It is a basic question while working on this project: How parallel is the vet?

@AndreasSpiess

5 жыл бұрын

I can imagine that creating these filters is not easy. I also assume you do not get lots of information on how to do it.

@BenEllisAkaGru

Жыл бұрын

Would you be able to share your work/research on building from components? I've been struggling to find an EM3405 :(

An inspiring video ! Indeed usefull.

@AndreasSpiess

5 жыл бұрын

Thank you!

Ржачное видео! Умелая подача материала! Интересные темы, великолепное доходчивое объяснение с иллюстрациями! Хорошая дикция! Так обучаться - одно удовольствие, спасибо, автор! Hilarious video! Skillful material feed! Interesting topics, great intelligible explanation with illustrations! Good diction! So learning is a pleasure, thanks, the author!

@AndreasSpiess

5 жыл бұрын

You are welcome!

Great video, good info, and funny.

@AndreasSpiess

4 жыл бұрын

Thank you!

Well you can make many things with it. If she's going out it's obvious to make some kind of automatic cat door. You can monitor her behavior ie. approaching her bowl or litter box.

@AndreasSpiess

5 жыл бұрын

You are right. And a viewer used this technology to decide how much milk each cow was delivering every day.

You are on the right track but a follow on project will need more intelligence to detect playloads - small rabbits, snakes, and mice! One of our cats regularly wants to bring in something to play with! We live in the country and I have imagined several applications like automatic door with airlock (very windy here) but I haven't come up with a bulletproof way to keep the wildlife out. If for no other reason than the mouse will weigh almost as much carried on the inside (snack) as outside (playload) :-)

@c1n

5 жыл бұрын

Somebody builded this by using image recognition: joakimsoderberg.github.io/catcierge/

The 4 dislikes were from cats who did not fancy a dirty great needle injecting an RFID tag under their skin!

@anullhandle

5 жыл бұрын

I don't think they can feel it. I had to inject considerable amount of saline under the skin for a few days and my cat put up no fuss.

@carelx7029

5 жыл бұрын

They feel it. That's why vets now prefer to chip under sedation. I call the needle for injecting the chip rather a pipe.

@jimb032

5 жыл бұрын

@@carelx7029 are you sure? That area at the back scruff of their necks that the momma carries them by is very nerve inactive. But many cats also don't tolerate a vet poking and prodding period and they probably give shots while they do the RFID too, so sedation is probably a norm for the work. Just guesses based on experience.

@Culturedropout

5 жыл бұрын

@@anullhandle Same. And that was a *big* needle!

@carelx7029

5 жыл бұрын

I had 5 cats chipped unsedated. My job holding the cat and it sure hurts them. The bigger the needle the bigger the chance you hit something. Off course vet ethics is also a moving subject. No pain if it can be avoided is now the standard.

aww great video, I admire you so much :)

@AndreasSpiess

2 жыл бұрын

Thank you!

Thanks for the experiments & the video ... will try out the 7€ version to build a small reader w/ ESP8266 and OLED display for our animal rescue organisation ... hopefully it will work ;)

@AndreasSpiess

5 жыл бұрын

This should work.

@GarryMobi

5 жыл бұрын

Received the reader within less than 2 weeks, came with an RFC card, supposedly FDX-B, which works in short distance (~2cm), but can't get it to read either my dog's tag, nor the neighbors dog's ... not sure whether it's the "wrong" antenna/reader circuit, or the bad maximum distance ...

Hi Andreas, really enjoyed this video as did many others from you. As for the module you finally used for your POC cat feeder did you eventually get any information about the use of J5-J10 bridges to choose a different combination of caps?

@AndreasSpiess

2 жыл бұрын

No, I have no additional info.

:-) excellent video!! nice work... beautifull cats !!!

@AndreasSpiess

4 жыл бұрын

Thank you very much!

she is adorable! :)

@AndreasSpiess

5 жыл бұрын

Thank you. I will tell her ;-)

No animals were harmed in the making of this video, only Andreas

@AndreasSpiess

5 жыл бұрын

And only one scratch on the arm. Nothing big ;-)

Thanks for the info Andreas. I think the antenna voltage is 360V though with that module and not 36V, hence the high voltage warning, so you may have used an x10 probe but not setup the scope accordingly.

@AndreasSpiess

2 жыл бұрын

Maybe. I do not know.

Very good 👍

@AndreasSpiess

5 жыл бұрын

:-)

Great video. I have had the idea to use RF reader to enable access to cat door flap. However, knowing that my cat is an excellent hunter that likes to bring in "trophies" that are more or less alive I decided to drop that idea. Only way would be an image recognition system to make sure the cat is not carrying anything in its jaws. Perhaps an idea for another great video featuring cats and home automation.

@AndreasSpiess

5 жыл бұрын

Good idea. Maybe still combined with the tag reader. It might be hard to distinguish Gini from Dishka using pattern recognition. Our is no hunter, she is probably too old :-)

@nicklaspersson4687

5 жыл бұрын

@@AndreasSpiess My cat has once "delivered" to the door an entire magpie that was a third her size. I imagine the mayhem if it had been brought into the house and played with it and then butchered it on the fine carpet. Happy day for cat - not so much for human girlfriend :-D. My cat has a very unique face with white red and grey areas so in my case a pattern system might be well suited. Such a system would have to be 'trained', I guess. I am curious how much effort that would take. Perhaps it is hard to train it to see "object in mouth". I can not estimate how hard of an ai-software problem it may be.

this is Amazing RFID program and give me an idea for my sheep.

@AndreasSpiess

2 жыл бұрын

Good luck with your project!

When I saw the "Home Automation for Cats", my first thought was "How can they solder without opposable thumbs?". Another commenter mentioned cats rubbing up against things. They do like to scent-mark, and I gather that the chips are usually implanted not too far from their cheeks. You might be able to help with the range problem by putting the smaller coil on some sort of post at about head height (they like to mark tree-like objects). For training, have the RFID control a treat dispenser. Once they associate "Marking a tree that looks like this " with "Good things happen", you could use the posts to control pet doors (with inside and outside posts to make the door swing the right way), food dispensers, and other automation.

@AndreasSpiess

5 жыл бұрын

Thanks for the info. This is probably more for an animal trainer. With my background, I stick to technical solutions ;-)

@MrJest2

5 жыл бұрын

For cats (not sure about dogs, but probably similar) the chips are generally inserted between the shoulder blades, slightly forward of them. Mostly because this is a location they can't scratch/chew and won't dislodge them while healing into place. Just FYI. :-)

This is a perfect youtube video. - Not to long. - Nerdy, yet clear. - Purring cats.

@AndreasSpiess

4 жыл бұрын

Thank you! She was not always purring, if you look at the thumbnail picture ;-)

Thank you for this video, it has pretty much all the info I was looking for. I'm planning to install a chip reader at the front door and garden door of our apartment to receive a warning via Home Assistant when our cats cross them. That way we can know and act right away if they ever escape (as the apartment is in a big city and our cats are not used to going out on their own, and when they go outside with us it's in a mostly enclosed garden in a more rural area at our house, they would very likely get lost, maybe permanently, and possibly hurt if they ever got out unsupervised). One thing I'm wondering is what orientation the chips are inside the cats. Since we don't have cat flaps on the doors and my project is meant to be a warning system rather than automating something like a cat flap or feeder, the most ideal location I can think of for the antenna would be flat on the group (possibly inside the doormat). But I'm not sure if this would work with a sufficient range. Otherwise I suppose I could try to put the antenna parallel to the door frame.

@AndreasSpiess

2 жыл бұрын

You have to try the reach of the antenna. But usually it is only a few cm.

First, I would like to say thank you for your great videos. You are one person that I admire very much, I am a big fan. When I was doing a bit research on alliexpress I notice that a few vendors posted that with a area of antenna bigger, the range could be bigger too. Did you notice if the cards can perform better (increasing the range) enlarging the area of the antenna?

@AndreasSpiess

5 жыл бұрын

I only changed the antenna of one device. But as I showed you cannot just change the antenna.

@eduardomendonca1280

5 жыл бұрын

@@AndreasSpiess ok yes I understood. But do you believe that if I use the last device that you used but change the size of antenna square (bigger) can I reach a better range of detection?

Great video, thank you. As a hobbyist maker I don't have access to complex electronic testing equipment. Is there a simple formula for getting in the right ballpark for the number of turns on the antenna given we will know 1) The diameter of the coil (catflap, 3D printed loop etc), 2) desired operating frequency, 3) specs of copper wire?

@AndreasSpiess

5 жыл бұрын

Not that I know of. Antennas are very delicate and influenced by many things.

I wonder if you could also use this on the surrounding area of a normal cat door and detect the cat standing in front of it, tho I guess the power would be too little for that.

@AndreasSpiess

5 жыл бұрын

Should be possible.

I just noticed that your little oscilloscope pointer doesn't have a little white glove on it. What size would it wear? Perhaps we can start a fund drive to buy it one.

@AndreasSpiess

5 жыл бұрын

I already printed one in white. But I have to paint the rest :-(

Great video as usual. Would it help the range if you tune the resonance of the LC tank in the Tx to peak at 134.2kHz either by changing the loop turns or the capacitor value? Is higher Q-factor better or worse in this application?

@AndreasSpiess

5 жыл бұрын

I did not look inside the analog design, so I have no idea. I assume the reduction of the number of turns did exactly that: To match the frequency better.

Sooo cute cats!

@AndreasSpiess

5 жыл бұрын

Thank you!

Yes, this was interesting! Had some ideas for my cats (Chief and Stitch) but yeah, I always have to many project ideas. Nice to see somebody else also experimenting with it with Chinese readers. Two question though. The coil you made, you just build it or did you do some calculations? And did you only try the more expensive reader? I would be interested to see if the cheaper readers also work is the cat is inserted into the coil (aka distance is pretty small).

@AndreasSpiess

5 жыл бұрын

Each reader needs a different coil. I tried to switch coils and it did not work. I had a working solution so I did not check the weaker devices. The chance they work is not too big, I assume.

Great Ideas an nice cats ;)

@AndreasSpiess

5 жыл бұрын

Thank you!

Very interesting video Andreas, really beautiful your cats, much more than the punk! bleah!

@AndreasSpiess

5 жыл бұрын

Agreed!

The image on aliexpress of the long range module looks like it has a bunch of capacitors with solder-jumpers. Of course it was easier to unwind a few turns of the new coil, but it seems nice to get the other option directly from the vendor. ;)

@AndreasSpiess

5 жыл бұрын

It was hard to get any information for these readers. I assume it will be even harder to get information about these jumpers :-(

@zvpunry1971

5 жыл бұрын

I gained information about these jumpers just by looking at them and the row of unconnected capacitors. I expect them to be all in parallel and also parallel with the coil to form a tank circuit. With the 0.55mH included coil there was probably 25.3pF (Possible E12 series values: 22pF + 3.3pF) enabled. There were probably also a not connected 15pF and 2.2pF capacitor, and with 17.2pF your 82mH coil would be good for 134kHz Another idea would be, removing these fixed value capacitors and installing a small trimmer close to the coil instead. And to tune it, I'd go for maximum peak to peak voltage when the reader is active. Or the reader isn't locked to a crystal but to the resonance frequency of that tank circuit, then it would be possible to move it to exactly 134,2kHz (it was slightly off). Just something I'd play with. ;)

I really hope you read this, halfway trough the video you pointed out that 2 readers interfere with eachother on the cheaper chip. Would I be able to build a feeding place with 2 cat doors with 2 readers if I used one of the more expensive chips?

@AndreasSpiess

2 жыл бұрын

I assume it depends on the distance between the two loops. But I never tested such a setup because I only had one sensor of each design.

Hi Andreas, thank you for your video and your friendliness. Is there a way to increase the capacity of the antenna that you're using? Thank you in advance 😊

@AndreasSpiess

3 жыл бұрын

There are always possibilities. But they are not simple, I think. Amplifying the currents, and increasing the loop size would be possibilities.

Great video I’m only learning so I like to try and understand how the sketch works. I’m not sure about the Hex into decimal function It works fine for country. When doing the ID , when you get to message[9] the mult x 16 is bigger than an unsigned long, so mult goes back to zero. This means you only process the first 7 values The checksum I have know idea how it works! And help with that would be great Many thanks

@AndreasSpiess

4 жыл бұрын

Unfortunately I do no more remember what I did in this sketch and I have no time to go back.

Andreas, such a good video! Do you have a circuit diagram you use for the final project with LED and everything?

@AndreasSpiess

3 жыл бұрын

Unfortunately, I do not have more documentation available :-(

Very interesting. How sensitive is the new "animal loop antenna" to switching power supplies? You said at the beginning of your video that these readers are sensitive to EMR. Did you checked the minimal distance?

@AndreasSpiess

5 жыл бұрын

I did not make any additional tests in this direction.

THANK YOU

@AndreasSpiess

3 жыл бұрын

You are welcome!

Thanks for another interesting video. Instead of only robbing our money with your mailbag video's, now we also need to get more cats. :)

@AndreasSpiess

5 жыл бұрын

But pay attention: You get a lot of Chinese stuff for one cat ;-) Warning: There are two new Mailbag videos in the making :-(

Hello Andreas, nice video! Thanks, nice to see that it actual works! I’m also working on a petfeeding system for my 2 cats, each with a seperate diet. Can you give/send me a link how you connected the last one (the high voltage one). I couldn’t find this via the links below .. I’m currently struggling with that. Thanks!

@AndreasSpiess

4 жыл бұрын

You should be able to read it with Serial.read(). I have no code anymore :-(

@RealDameBlue

4 жыл бұрын

@@AndreasSpiess Thanks for the answer, I was doing that, but sofar no success for me. Btw, my cats have a dutch accent ;-)

@oSaluun

2 жыл бұрын

@@RealDameBlue I'd love to hear an update. did you succeed? Surefeed bowls wont do for us bc we need a system with a timer for scheduled feeding when we leave for a weekend, so our cat sitters dont have to come in twice a day but only once. I was thinking to get a small shelf with doors, put cat doors into its side walls on 2 different levels that recognize which cat is trying to enter, and place something similar to catmate bowls inside (the round ones with a built-in timer). i'm kind of in the mood to overengineer the whole thing

so which one did you use for the final one with the self-made loop? The most expensive one? Or would the middle one also work? Do you think you missed any important details if I were to replicate this? I only have moderate knowledge on these things

@AndreasSpiess

Жыл бұрын

I used the expensive one.

Hi is it possible to do a screen test, mainly power consumption, for small oled or e ink module? Thx

@AndreasSpiess

5 жыл бұрын

I think so.

Hi, thanks for the great video. I have bought and tried the second RFID reader and connected it to an Arduino mega. I tried to read it but constantly get 0 from Serial.available(). Any idea what I am doing wrong?

@AndreasSpiess

2 жыл бұрын

Unfortunately, I cannot do remote debugging. I would connect the reader to a USB to Serial adapter and check if the reader works. If you have an oscilloscope this might also help. But first I would check if you reversed RX and TX...

Awesome work man. Really interesting. Have an amazing weekend, Andreas 🇸🇪

@AndreasSpiess

5 жыл бұрын

Thank you. Have a nice week!

Great video! I have purchased the "Middle Reader" from AliExpress and I'm having trouble knowing how to connect it (there is little documentation or examples to find). Do you have a wiring diagram available? Thanks!

@AndreasSpiess

3 жыл бұрын

This is an old video and I do not remember more than I showed :-(

Andreas, do you know what the RST pin is on the expensive board. I'm guessing its reset but pulling it to ground didn't do anything. The board seems to only report the chip ID once when it first sees its presence. I'd like to be able to poll for a chip on demand so I can tell if the cat is still present after it's seen and I was hoping the RST would do that.

@AndreasSpiess

5 жыл бұрын

I never tried this variant. So I do not know

Thanks for the lesson. We care for a friendly feral cat that has adopted us and remains outside. He has been processed by the "Catch, vaccinate, nueter and release program". They also clip the ear of the cat so if trapped again they know it was previously processed. My wife read they also chip some of these cats and we are curious if our furry friend was also. I have the means now to do so. Cheers.

@AndreasSpiess

Жыл бұрын

Adopting these poor cats is a good thing!

What do the bank of capacitors links do ? I assume you use them to tune the Ariel ? But not sure how If it is tuned does it improve the range ?

@AndreasSpiess

4 жыл бұрын

The range will always be small.

Hi, should the module flash when it reads a chip? Does it need to be able to read a chip even if it's not connected to the Arduino? I ask these questions because my module does nothing, even when powered it detects nothing. Thank you.

@AndreasSpiess

Жыл бұрын

I do not remember those details :-( But it should work without Arduino.

Thanks!

@AndreasSpiess

2 ай бұрын

Welcome!

Does matching the inductance of your antenna with the one that works mean that your antenna will work too, or are there other considerations?

@AndreasSpiess

4 жыл бұрын

Your assumption is right.

Hi Andreas, I'd like to build a similar receiver and build my own antenna. I think you used copper wire with insulation (enamelled). Would it be possible to use wire without insulation?

@AndreasSpiess

Жыл бұрын

The wire has to be insulated. Otherwise it behaves like only one winding.

Great, I plan to make one feeder for my three cats. Great Job Tagging Punks made me burst out laughing

@AndreasSpiess

4 жыл бұрын

That is an ideal project for this technology!

I'm building an automated cat feeder based off your video, so THANK you for doing this testing! Question though: what is driving the diameter of the loop? I'd like a larger loop for my kitties if possible (maybe even a square shape), but I assume I'd reduce the range of the scanner. Is this true?

@AndreasSpiess

4 жыл бұрын

The driving factor is the size of the cat. But you have to test the range.

@ridhoheranof3413

2 жыл бұрын

No, if you make a square shape that would effect for the position of your tag, the tag and the antenna should face to face, but in a circular shape the different position of your tag wouldn't cause anything

3:56 best part! Cheers

@AndreasSpiess

5 жыл бұрын

:-)

Love your project, would it be possible to know how many loops were left on your 200mm ring for a good starting point for producing my own version of this?

@AndreasSpiess

3 жыл бұрын

It is hard to count. I guess 15-20 at a diameter of 22cm. But You have to measure. Start with more because cutting is easier than adding ;-)

@greevous

3 жыл бұрын

@@AndreasSpiess Thankyou, that will give me a good starting point

Make the vacuum robot follow the cat.

@AndreasSpiess

5 жыл бұрын

To remove the mess her hairs make ?

@MrGordane

5 жыл бұрын

Put a camera on the robot and livestream it

@CyberlightFG

5 жыл бұрын

A real challenge would be to track each cat and clean there 10 minutes after she has been there.

@nombinator

5 жыл бұрын

@@CyberlightFG If it can clean a sofa, let me be you first buyer !

Hi Andreas, is it possible to build a coil as big as a front- or other door, so aproximately 2.00 x 90 cm? So you can detect if a pet went through the door. The coil is than hidden around the doorframe. I understood the method to follow is: measure the inductance of the sensor coil and replicate this inductance in your own coil. (I have lots of thin enamelled wire.) And is there a formula I could use to know in advance how many turns I have to make around the doorframe?

@AndreasSpiess

Жыл бұрын

I do not know if this would work. But I am very sceptical. You have to try if you want to know.

My both cats have last generation chip with temperature reading. Why the sure flap and other connected feeder or cat flap do not use this feature. It would be useful to have an alarm like a red LED that stays on until reset and showing your cat has high temperature.

@AndreasSpiess

10 ай бұрын

Interesting innovation to read the temperature. I did not know it exists...

Hello Andreas. I know this is an old video, but I'm not finding anything on your website about this implementation and it's something I'm quite interested in. I've seen your github page for this, but would like details on how to wire things together, which I assume would be on the blog. Thanks!

@AndreasSpiess

Ай бұрын

I do not have other information available ☹️

Hello Andreas. I am going to build a very similar feeding station but for hedgehogs. You used 0.4mm wire for your coil. Is that the ideal size of wire or just what you had already? I need to order some for my project so want to get the most appropriate wire

@AndreasSpiess

6 ай бұрын

I do not think that the diameter is important. But in the end, you have to measure the inductance. It also depends on the diameter.

@parcydwr

6 ай бұрын

@@AndreasSpiess The 'long range' circuit turned up today. I am not impressed with it. I think it is a lower rated version of your one, although it looks the same. I am getting quite fed up with the rubbish coming from China.

I'm wanting to do this with my reader so i can track these strays, hope to find your info to help me do that. Thought about just modified reader. Or maybe you have pre built one cuz I'll take years to learn it.

@AndreasSpiess

5 ай бұрын

I am just a KZreadr and do not sell anything :-(