I am trying to create my own project (almost exactly like this one)
What I cant grasp is how is he 'triggering' the beeps on each 'key' press.
In the comments/notes there is mention of photodioes in use.. but how can that trigger/detect each 'finger press' (so to speak)
For whatever reason, it seems simple, but my brain is 'mush' today.. and I can figure out how it was done?
Notes:
Not this is not real, its a prop
I know these are not 'real/true' key presses
This is just laser etched glass, with some PIR/motion sensor to trigger the 'on' (LED) behavior..
Most probably the thick glass plate was chosen for the distribution of light from the side, like used in some instrumentation scales. The lines and symbols can be engraved or etched, and color can be added to the grooves if desired.
The touch panel can be added on another transparent layer, on glass or on a foil PCB. This is how (specialized) LCD displays are made, and this technique also can be used for creating touch panels.
I'm not really concerned with the glass etching portion.. I'll do that myself on my laser cutter...
and from what I know.. its just regular glass.
(was actually made as a static prop/plain glass.. by some guy 'over seas' (Netherlands?).. the guy in the link bought the glass.. and added some Arduino stuff to it.
I do not believe there is any 'real/true' touch screen business going on..