We are first going to see how to assemble the different parts of this project.

Let's start by connecting the power supply. Connect the 5V pin from the Arduino board to the red power rail and the GND from Arduino to the blue power rail on the breadboard.

Now, let's connect the fingerprint sensor. First, connect the power by connecting the cables to their respective color on the breadboard. Then, connect the white wire from the sensor to Arduino pin 3 and the green wire to pin number 2.

After that, we are going to connect the relay module. Connect the VCC pin to the red power rail, GND pin to the blue power rail, and the EN pin to Arduino pin 7.

Finally, let's connect the LCD screen. First, connect the power: VCC to the red power rail and GND pin to the blue power rail. After that, connect the I2C pins (SDA and SCL) to the Arduino board. The I2C pins are next to pin 13 on the Arduino Uno board.

The following is the final result:

If your project is similar to the preceding image, congratulations, you can now proceed to the next section of this chapter and build exciting applications based on the fingerprint sensor!