When I built my mouse (https://jfloren.net/bellwether.html) I found that in the past there were these neat modules which packaged a sensor and a microcontroller on 1 chip, and you basically just had to wire it up to USB -- but those don't seem to exist any more! So I picked essentially the same Pixart sensor as you, used the same leaked datasheets, and built my own. I do wonder why the all-in-one devices disappeared, though.
Actually it seems modern devices use a CCD and then process the image.
Yes, I've also thought about mounting the switches vertically. And more surface should also provide more grip on the table.
> To be able to call this a trackball, we also need some kind of ball or sphere of course. Many people go with the smallest regulation billard balls with a diameter of 38mm.
I will have to do some further experimentation. Thanks!
Using another mouse movement sensor and ignoring one dimension might be simpler for DIY.
I don't understand how to get the stepped motion of the Kensington scroll rings and most mouse wheels. Maybe it has bumps to move past.
Now, I'd love to see a picture of how a hand is supposed to sit above or around this trackball because I can't picture how fingers can comfortably reach the 4 buttons just by looking at their location on the device.
Which leads me to the personal opinion: I think I prefer the design of the testbed over the final iteration. Buttons are missing, I know, but... Here I stand nonetheless.
In the meantime, enjoy the sweet nectar of an archive.org snapshot link (collected yesterday):
https://web.archive.org/web/20230217104641/https://www.xytho...
Why am I not surprised? I love Germany .
