PASSWORD PROTECTED DOOR LOCK SECURITY SYSTEM
LCD KEYPAD DOOR LOCK USING AN ARDUINO Hi ! how about locking your room using an LCD door lock. That would be nice, especially so if you want to lock out a pesky sibling. 😄 THIS IS WHAT YOU WOULD REQUIRE An Arduino Uno Micro Controller 16 x 4 LCD display 12 V DC solenoid door lock Led Lights Some jumper wires for the connections 9 V battery (an external power supply more closer to 12 V would be better ) Relay 10k potentiometer 220 Ohm resistor 4 x 4 keypad HOW DOES THIS DOOR LOCK WORK 🔐🔐🔐 When one enters the password for the door lock, the keys pressed match with the default keys. The solenoid lock is activated and the door lock opens. Simultaneously, the LCD also displays a 'Welcome' message. If the keys do not match the default password then the door lock remains closed. The LCD also displays 'Wrong Password' CIRCUIT DIAGRAM THE CODE After setting up the circuit as shown a...