Single button code entry for a digital lock
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Yes, it has got just one push button to enter the code to unlock the system. The author demonstrates how you can just enter multiple code numbers in sequence from a single button input. If the code entered matches with the preset pass code, a relay is turned on.
This project uses a PIC16F628A microcontroller that monitors the user inputs from the single button. You can enter a number 3 by pressing the button 3 times. Every time you enter a number, the microcontroller acknowledges by lighting an LED. When you entered all the code numbers correctly in sequence, the relay is turned on. You can connect this system to your garage door opener, or to any other security lock. The another interesting part of this project is that you can even change the pass code with the same button. For more details, visit the author’s page down below.
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