Will we ever run out of them?
In: Mathematics
A QR code can encode maximum 2953 bytes of data, that’s a lot to the point that it’s not worth asking how many variations it is, it’s more than enough.
Problem is, that maximum size QR code is really big and also hard to read in anything but absolutely ideal conditions. For practical identifying codes you are limited to versions of the code with much less data in them. In fact even the smallest QR code is too big for many applications and formats like DataMatrix are extensively used that can do the same job with less dots. You should try to think in terms of what is the least number of dots you can get the job done with.
One amusing format which unfortunately only has a matlab implementation available is this for example [https://doi.org/10.1371/journal.pone.0136487](https://doi.org/10.1371/journal.pone.0136487)
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