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![MOBILE REPAIRING LAB ON INTERNET,CELL PHONE LAB: L7 Key pad Schematic](https://1.bp.blogspot.com/_IJAx4unKjOA/TEkZR9EGO1I/AAAAAAAAAN0/T2Mp3YgFfWs/s1600/L7+Key+pad+Schematic.jpg)
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![Understanding Keypads Circuit, a way to Learn How to Repair Keypad](https://2.bp.blogspot.com/_8JZhVVmpICU/S_EIH9lZfRI/AAAAAAAAAXs/sZ-D5kLmhFg/s320/block diagram.gif)
![4x4 Keypad Module Pinout, Configuration, Features, Circuit & Datasheet](https://i2.wp.com/components101.com/sites/default/files/inline-images/4x4-Keypad-Internal-Structure.png)
4x4 Keypad Module Pinout, Configuration, Features, Circuit & Datasheet
![4x4 Matrix Keypad Module - 16 Keys | How it’s Works » ElectroDuino](https://i2.wp.com/www.electroduino.com/wp-content/uploads/2020/06/4x4-Keypad-module-Pin-Diagram.jpg)
4x4 Matrix Keypad Module - 16 Keys | How it’s Works » ElectroDuino
![How to Interface 4*3 Keypad With Arduino | PROJECTSDUNIA](https://1.bp.blogspot.com/-USXPAz_bnoY/Va0DVU7AnXI/AAAAAAAAAhQ/Imop7BNURmY/s1600/keypad%2Bcircuit.png)
How to Interface 4*3 Keypad With Arduino | PROJECTSDUNIA
![Interfacing hex keypad to arduino.Full circuit diagram, theory and program](https://i2.wp.com/www.circuitstoday.com/wp-content/uploads/2014/05/hex-keypad-arduino.png)
Interfacing hex keypad to arduino.Full circuit diagram, theory and program
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![How to Set Up a Keypad on an Arduino - Circuit Basics](https://i2.wp.com/www.circuitbasics.com/wp-content/uploads/2017/05/Arduino-Keypad-Tutorial-4X4-Keypad-Schematic.png)
How to Set Up a Keypad on an Arduino - Circuit Basics
![MOBILE REPAIRING LAB ON INTERNET,CELL PHONE LAB: L7 Key pad Solution](https://3.bp.blogspot.com/_IJAx4unKjOA/TEkYYpjJUUI/AAAAAAAAANc/T9mqGFvQ4DQ/s1600/L7+Key+pad.jpg)
MOBILE REPAIRING LAB ON INTERNET,CELL PHONE LAB: L7 Key pad Solution
![Controller Keypad Schematic - W/ Arduino Mega - EasyEDA](https://i2.wp.com/image.easyeda.com/histories/e6e4cee8682e4efe82eaee28349ab779.png)
Controller Keypad Schematic - W/ Arduino Mega - EasyEDA