When finished creating a layer of wires (remember about clearance = 2.1 mm!) also visited the idea own mouse PCB... Now I see that there are three ways:
- Direct connection of the sensor to Amiga mouse port. (conditionally, deutsch version)
- Almost the same, but with harmonization (russian version)
- Wiring own board (czech version).
Surprisingly, when people didn't know each other come to the same in different ways. Thank you for your reference!
It is really a matter of the chip. For the mice I had a look at - the old version - the chips were designed for TTL logic levels in mind anyhow, so the quadrature output can be connected to the Amiga TTL input directly. This is not necessarily true for all chips, some use an internal conversion to 3.3V and run on 3.3V logic levels.
I personally tried to recycle as many components as possible, so the mouse itself is the original Logitech design, the mouse cable comes from a defunct Amiga mouse and hence fits nicely. The drawback is that it lacks a wire for the middle mouse button.
The czech version is a new "design from scratch". That's of course the better solution for professional vendors, but not an option for hobbyists like me.