Loving it! Great job on the arduino, and while I personally dislike soldering wire leads to a PCB directly, I can definitely understand why you've done it like that.
A scratch-built trackball would be very interesting.
Thanks a lot. I do not like soldering wires directly to the PCB either. I did the first firmware using a Teensy++ 2.0, but it didn't fit the case because of the header I soldered onto it.
The button assembly is really sturdy and CH Products used very thick ABS. Their's not much space left unused and I had to rely on the smallest arduino I found and solde the wire to the PCB. This way the device is also kept unharmed, which was a priority for me.
I bought a new monitor yesterday and jumped from a 1280x1024 resolution to a 2560x1440 one. I was a little afraid that my trackball would be a PITA to use due to its prehistoric sensors, but it is just perfect. I still do not have to perform a full ball revolution to travel the whole screen.
Thanks a lot, that is very much appreciated. Feel free to correct my mistakes as it is my only way to improve my english .
I'm redesigning the blog to include more cathegories and give it a more professional look. I have not much visitors and no comment yet, but I hope it'll become more popular . It needs more contents though.