They create high-quality PCBs at reasonable prices. The PCB board used in this project is sponsored by the PCBway Company, which is one of the most experienced PCB and PCB assembly manufacturer. While the ground wire of electronic Lock is directly connected with the ground of the 12 volts power supply. As you can see the electronic lock 12 volts wire is connected with the common pin of the relay, while the normally open pin of the relay is connected with the 12 volts. This relay is used to control the electronic Lock. This is a current limiting resistor.Ī one-channel relay module is connected with the Arduino’s pin number 13. The data pins D4 to D7 of the LCD are connected with the Arduino’s pin number 6, 5, 4, and 3.Īn Led is connected with the Arduino’s pin number 12 through a 330-ohm resistor. The RS pin of the LCD is connected with the Arduino’s pin number 10, the R/W pin is connected with the ground, the enable pin is connected with the Arduino’s pin number 9. While the other two legs of the variable resistor are connected with the Arduino’s 5 volts and ground. Pin number 3 is the contrast pin of the 16×2 LCD and is connected with the middle leg of the Variable resistor or Potentiometer. Pin number 2 and pin number 15 are connected with the Arduino’s 5 volts. Pin number1 and pin number 16 are connected with the Arduino’s ground. Row 3 is connected with the Analog pin A2.Ĭolumn 1 is connected with the Arduino’s Analog pin A4.Ĭolumn 2 is connected with the Analog pin A5.Ĭolumn 3 is connected with the Arduino’s digital pin 2, and column 4 is not connected. Row 2 is connected with the Analog pin A1. Row 1 is connected with the Arduino’s Analog pin A0. Door locks with keypad how to#If you want to learn how to make a schematic and PCB then watch my tutorial. Door locks with keypad password#This is the complete circuit diagram of the Password protected Door Lock Security system designed in CadeSoft Eagle 9.1.0 Version. Password Door Lock Security System Circuit Diagram: These two wires will be connected with the relay common and normally open legs. As you can see I have cut the Red wire by connecting and disconnecting these two wire the Electronic Lock can be controlled. We need 12 volts to control this electronic lock. It has a coil that can be energized and de-energized. The electronic lock working principle is just like the Relay. In this project, you can also use a 4×3 Keypad. You can purchase the readymade one which you can see in the picture above, or you can build the one by yourself using Pushbuttons. The first one is row 1, the 2 nd one is row 2, row 3, row 4, column 1, column 2, column 3, and column 4. 4×4 Keypad Pinout:Īs you can see the Keypad is provided with the female headers due to which it can be easily interfaced with the Arduino using the male headers or male to male type jumper wires. But in this project, I am not using the 4 th column. This is a 4×4 Keypad which means this Keypad has a total of 4 Rows and 4 Columns. A 4×4 or 4×3 keypad can be used to enter the desired password. The entire project is controlled by using the Arduino. The password-based door lock system allows only authorized persons to access the restricted areas. Doors locked using the conventional locks are not as safe as they used to be in the past, nowadays anyone can easily break-in by breaking these locks. The main entrances, lockers, cabinets, etc should be protected with some kind of security systems. Each and every individual needs to feel secure. Password protected Door Lock Security System: I would appreciate your support in this way! I may make a commission if you buy the components through these links. Without any further delay let’s get started!!!ġ2v Electronic Door Lock / Elock / Solenoid Lock: The number of wrong attempts can be increased or decreased as per the requirement. If a wrong password is entered 3 times the person is locked out for 5 seconds and an LED is turned ON, which can be replaced with a buzzer. I have checked this Password Door Lock Security System many times and it worked perfectly. Currently, the password is 1234, which you can change in the programming you can even select a password consisting of more than 8 digits. When you enter the correct 4 digit password the door is opened for 5 seconds. Password Door Lock Security System using Arduino and Keypad- in this tutorial, you will learn how to make the most efficient Password protected door lock security system using Arduino and a keypad.
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