For technical reasons I abandoned this opto project.
The diode matrix is wired but the power resisters are not installed.
There are enough extra optos for another matrix.
There are also 61 formed black aluminum angles to glue to your keyboard.
Anyone interested for $30 plus shipping?
I suppose it will ship in a mailing tube?
If I've got the permissions right you can see the bar at:
https://drive.google.com/drive/folders/ ... sp=sharing