Keypad Modules are expensive so to relace them in this video i am going to show you how you can make combinational lock using push button and Arduino. You will need Arduino, 8x LEDs, 6X Buttons, ...
* https://arduinointro.com/projects/make-interactive-arduino-projects-using-pushbutton-and-lcd * https://roboticsbackend.com/arduino-push-button-tutorial/ * https ...
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