Pins 11, 12, 13 and 14 are data pins of the LCD that are connected to pins 7, 6, 5 and 4 of Arduino, respectively. Preset PR1 is used to adjust the contrast of the LCD display. An electronic door-lock ...

In this article we discussed about 16x2 LCD, its working, pinout, and also how to use 16x2 LCD with Arduino. We provided Circuit Diagram, Complete Arduino Code, and step-by-step guide. Skip to main ...

This project demonstrates how to create a digital safe lock system using an Arduino, a 4x4 keypad, and a 16x2 LCD display. ... #Circuit Diagram Keypad ... Arduino Pin 6 6.Column 2 (C2): Arduino Pin 7 ...

The DIY biometric lock is also equipped with three push buttons and a 16×2 LCD display. “This is a security door lock with fingerprint sensor. It is able to record all the door actions to and ...

Circuit Diagram and Explanation: In this Raspberry Pi Finger Print sensor interfacing project, we have used a 4 push buttons: one for enrolling the new finger pring, one for deleting the already fed ...

This project is a security system for ESP32, allowing users to enter a PIN using a 4x4 membrane keypad. If the PIN is entered correctly, the system displays a message on the LCD screen, and in case of ...

Arduino is the heart of this programmable display. The circuit is shown in Fig. 1. Fig. 1: Circuit diagram of Arduino based programmable digital data display. The power supply is applied through the ...