Suggestions for improvement
Hi all,
I've now designed a 4X4 key pad wich might be useful with an MCU.
It contains digits 0 through 9 plus function keys "+", "-", "preveous", "#", "*" and "E" for Enter.
Each single key might be placed anywhere in the schematic design for shortest net routing.
The pins are labelled in a logical order, so connecting the single keys to a matrix should not constitute any problem.
Each single is identified by its function, e.g. "5" has the label KB-5 and additionally pin information C2,2 and L2,2, meaning it is the second key of the second column and the second in a row.
Connecting the keys simply connect each key starting with the same pad number, C1,1 through C1,4 connect to net column1 and e.g. L3,1 trough L3,4 connect to net line 3.
Any suggestions for improvement?
Hans