Really nifty; can I ask what tags you are using? (are they off-the-shelf)
Would be interested in doing something similar
These:
https://www.chafon.com/productinfo/1070742.html
Bought them on Alibaba.
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krogenx commented on In 2006, Hitachi developed a 0.15mm-sized RFID chip hitachi.com/New/cnews/060... · Posted by u/julkali
krogenx commented on In 2006, Hitachi developed a 0.15mm-sized RFID chip hitachi.com/New/cnews/060... · Posted by u/julkali
Used to develop readers based on similar UHF chips (868 MHz in EU). They were quite expensive compared to printed bar codes those were replacing. Also large. With (folded) antennas we are still talking about 40*10 mm minimum for the label. You can not use them on metal surfaces. Readers nearby will interfere as it works by EM wave backscattering, unlike NFC which is essentially a transformer (with electric field intentionally supressed usually). I think it still is a solution looking for problem. QR codes are cheap and NFC (14 MHz) readers are everywhere.
I have a hobby project where I am using UHF tags for counting poultry. The advantage that it gives me is long range (few meters) compared to LF / HF tags. QR code also wouldn't work due to size and distance.
Here's a video.
That will ruin them at $1,500 to $2,000 per litre of ink...
Maybe they could do some R&D to see if coffee could be used as ink.
krogenx commented on Rollercoaster Tycoon (Or, MicroProse's Last Hurrah) filfre.net/2025/08/roller... · Posted by u/cybersoyuz
Man, I can still remember the magic I felt when first discovering that game on my cousin's laptop in 1999. Such a simple game yet allowed enough creativity for an 10 year old boy to be imaginative.
There does come a point where there isn't much else to do with the game once you get good enough at it, so I started having fun doing "experiments". One of the things I did in RCT was build "prisons" where I leveraged things like the carousel to work as a one-way door into the park to allow guests to come in but prevent them from leaving; it lead to a barren cement building with a turbo drop coaster designed to be intentionally dangerous so I could "execute" prisoners. There was puke everywhere after a while. What a disturbing mind I had.
Similar things come to my mind with The Sims. Once the game was “over” (maybe you’ve reached the top job) you could still do all sorts of things… Some of them a bit masochistic.
I’ve been working on an animal management app for the last two years or so. It’s a hobby project so it’s not going very fast. Recently I’ve released a new version with support for one model of a UHF RFID reader. It allows me to count and identify my chickens from up to 15 feet away.
https://youtu.be/_iGn_pZ3IkY?si=x4ijZdAP-suhuJ7Y
https://apps.apple.com/us/app/manger-animal-manager/id674269...
I've been thinking about ways to count my chickens, making sure they return to the coop and don't get locked out at night. Most of the time all tge birds get in, but occasionally some will dawdle and wind up sitting outside a locked coop door.
You mention this can read for a couple meters. Can it read all the members of a flock, so I could mount a single transmitter in the ceiling if the coop, or is it one at a time, so something that should live above the door
The scanner that is used in the video has configuration for transmit power. At its maximum setting, the range is 15 feet with clear line of sight.
Tags with larger antennas, generally speaking, have longer range but might be too big for younger chickens.
So overall there are a lot of variables.