I still have some ADNS2620 sensors in my stash (yes, that was a typo that is now fixed). Look into the readme and see that there is a company called PixArt that seems to be the only source for some of these parts. I did get a bite (mouse bite?) from their rep at the time of the OSHWA Summit 2 years ago, but they went crickets. This project could get resurrected if there is a replacement sensor chip. I kind of like the Arduino Leonardo + ADNS sensor, and not interested in just a breakout of an 'all in one' mouse sensor.
Avago's datasheets were thorough and easy to understand. Pixart datasheets, if you can find one, are incomplete and full of grammatical non-sequiturs and ambiguities. I really miss Avago.
I still have some ADNS2620 sensors in my stash (yes, that was a typo that is now fixed). Look into the readme and see that there is a company called PixArt that seems to be the only source for some of these parts. I did get a bite (mouse bite?) from their rep at the time of the OSHWA Summit 2 years ago, but they went crickets. This project could get resurrected if there is a replacement sensor chip. I kind of like the Arduino Leonardo + ADNS sensor, and not interested in just a breakout of an 'all in one' mouse sensor.
If yer interested in getting a full kit or an ADNS sensor, please comment on the github issue tab https://github.com/biomurph/Mouse/issues/7