[Solved] how to DIY the Infrared Matrix Password Input System

we make this Infrared Matrix Password Input System based on ICStation Compatible Board Arduino. It works under the DC 5v power supply, and uses the 4 *4 Matrix Keyboard or the infrared remote control to input the password, and uses the LCD1602 to display the characters which the correct password and wrong password corresponding. This system is very easy to made with low cost and has strong security. What’s more, it can be used in the special situations which normal humans should not close to, such the High radiation zone, the High infection area and so on.

Functions:
1) Uses the 4 *4 Matrix Keyboard to input the password and uses the LCD1602 to display the result. When the password is right, the LCD1602 will display “Success!”. When the password is wrong, the LCD1602 will display “welcome”.

2)Uses the infrared remote control to input the password and used the LCD1602 to display the result. When the password is correct, the LCD1602 will display “Success!”. When the password is wrong, the LCD1602 will display “welcome”.

Component list:

1.1×ICStation ATMEGA2560 Mega2560 R3 Board Compatible Arduino

2.1×Bread board

3.1×10K RM103 Blue White Resistance Adjustable Resistor

4.1×1602A HD44780 Character LCD Display Module LCM Blue Backlight

5.1×4 *4 Matrix Keyboard

6.1× Infrared Remote Control Module

7.15× Jumpers

8.15×Dupont Line

9.1×5v Power Supply

Schematic diagram



I will add the full project to the attachment.