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DIY Keypad Matrix From the Principle of Operation to Implementation : 3
![[DIAGRAM] Nokia 101 Keypad Ic Diagram - MYDIAGRAM.ONLINE](https://i2.wp.com/wiki.sunfounder.cc/images/f/f9/Keypad_schematic.png)
[DIAGRAM] Nokia 101 Keypad Ic Diagram - MYDIAGRAM.ONLINE

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Matrix Keypad Wiring

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Matrix Keypad (4x3) Interface With Microcontroller - Electronics Guru