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![Arduino Keypad Tutorial - 4X4 Keypad Schematic | Arduino, Arduino](https://i.pinimg.com/originals/92/b1/0e/92b10ede657f34a9a678d0ddb723ecb7.png)
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![4x4 Keypad Circuit Diagram](https://i2.wp.com/circuitdigest.com/sites/default/files/circuitdiagram_mic/ATmega32-Keypad-Circuit.gif)
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![15 4X4 Keypad Circuit Diagram | Robhosking Diagram](https://i2.wp.com/learn.parallax.com/sites/default/files/content/propeller-c-tutorials/simple-devices/MatrixKeypad/4x4-Keypad-FLiP-220s.png)
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![4x4 Keypad](https://i2.wp.com/www.talkingelectronics.com/EM/4x4 Keypad/images/16SwitchesCct-3.gif)
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![4x4 Keypad](https://i2.wp.com/www.talkingelectronics.com/EM/4x4 Keypad/images/4x4KeypadOverlay.gif)
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![4x4 Keypad Module Pinout, Configuration, Features, Circuit & Datasheet](https://i2.wp.com/components101.com/sites/default/files/component_pin/4x4-Keypad-Module-Pinout.png)
![Interface 4x4 Matrix Keypad With Microcontroller - EmbedJournal](https://i2.wp.com/d33wubrfki0l68.cloudfront.net/ab70e07fa19af3da60d5dc2826e73c8f73e6ee9b/3a4d1/assets/posts/embedded/2013-08-17-interface-4x4-matrix-keypad-with-microcontroller/matrix-keypad-schematic.png)