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Punch in your secret key into this numeric matrix keypad. This keypad has 16 buttons, arranged in a telephone-line 3x4 grid + 4 extra keys - A, B, C and D. It's made of a..
64x62x8 mm Tutorial:
1. SK40C Tutorial, project 17: Interface with 4x4 keypad
2. Communicate in between BBFuino (Arduino) and SK28A (PIC16F876A) by..