I can't figure out a phone key matrix Answered
I'm Anthony and I'm a game designer / game master in an escape game, here in France. I work on Arduino most of the time and I generaly don't reuse electronics of other systems in order to modify it. But now I have to modify a phone to integrate some custom functionnalities.
I followed a tutorial on this website to find out how to get a key matrix of the phone circuit (link to the tutorial)
I'm quite a beginner to electronics and i admit that the key matrix I'm in front of looks really complicated. It has 9 wires soldered on it, but I can determine how much groups of keys it gets. I tried to use a multimeter with the continuity function but nothing happened. Do you have any tips for me in order to find it out ?
Also, the small black lines that cross the circuit's wires are conductive but I have no idea of what the big black dot (on top of the circuit) is... It's hidding the paths so I can't see where the wires go.