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![Analog Keypad or Multiple Buttons on A single Arduino Pins [code example] - Introductory Tutorials - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/2/9/b/29b0910c7a299793b079e8185194168ca6dc63f1_2_690x357.jpeg "Analog Keypad or Multiple Buttons on A single Arduino Pins [code example] - Introductory Tutorials - Arduino Forum")
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