the color mapping shows where each point on the sensor maps to the visual map.
Every cell on the map is read except the last row of the map and one other cell (marked with red crosses). These cells exist on the map but cant be location on the physical sensor.
Sometimes when I pressed a cell, other cells would also record pressure. This happened for 2 cells in particular. But the second time I tested, this effect was gone and every cell that was pressed was read individually.
2. Pins:
the horizontal pins (5 of them) are connected to the "ANALOG IN" part of the arduino from 0 to 4
and the vertical pins(10 of them) are located on the "DIGITAL" section of the arduino starting from pin#22 and only on the even pins, indicated by the black marker below.
About the pins 41,43,45,47,49, there are some wires connected to them. 4 yellow ones and a red one which is connected to pin 41. From the other end, these wires are connected to the white board on column j. Here is a mapping:
pin# | board# (column j)
------------------------------
41 | 45
43 | 48
45 | 55
47 | 58
49 | 60
The picture below shows the above mapping:
