3x4 Matrix keypad connected to an arduino. Displaying results of key pressed on a 7 segment led display via 74HC595 shift register which reduces the required pins of the 7seg display from 8 to 3.
I will be holding Arduino classes at Northbranch Library on the 2nd and 4th Saturdays . Click Here For More Info.
Come learn both theory and trouble shooting techniques. If you cannot make it I can also skype.
Here is the video followed by the code used in this min project:
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