PCBGOGO, established in 2015, offers turnkey PCB assembly services, including PCB manufacturing, PCB assembly, components sourcing, functional testing, and IC programming.

Its manufacturing bases are equipped with the most advanced production equipment such as YAMAHA pick and place machine, Reflow oven, Wave soldering Machine, X-RAY, AOI testing machine; and the most professional technical personnel.

Though it’s only five years old, their factories have experience in the PCB industry for over 10 years in Chinese markets. It is a leading specialist in surface-mount, thru-hole, and mixed technology PCB assembly and electronic manufacturing services as well as turnkey PCB assembly.

The Capacitive Fingerprint Sensor is a nice and compact one that is similar to the one at the back of your smartphone. It comes with round breathing LEDs and has a simple structure, small size, and delicate appearance. The sensor offers fast recognition speed and high security. It supports 360-degree arbitrary angle recognition and deep self-learning function, high performance, and low power consumption. Loaded with ID809 high-performance processor and semiconductor fingerprint sensor as the core, the sensor adopts a built-in IDfinger6.0 algorithm, which can complete all fingerprint identification work independently. This sensor supports UART communication and while working with the Arduino library, it can easily realize functions like fingerprint registration, fingerprint deletion, etc. It is a 6 pin device that can be easily connected to microcontrollers by virtue of the pitch connecter that comes with it. But one thing to keep in mind is that the color-coding of the wires that comes with this device is different from the normal coding. So we need to take care of it while doing the connections. The color coding is as given below:-

Red Wire = Ground Pin

• Operating Voltage: 3.3V
• Operating Current: <60mA
• Communication Method: UART
• Storage Capacity: 80 fingerprints
• 1: 1 verification time: 300~400ms
• Pixel Resolution: 508dpi
• Number of Pixels: 160x160Fingerprint
• Detection Area: 8.0mm x 8.0mm
• Working Environment: ‐40‐60℃
• Dimension: Diameter 21mm/Height 5mm

Some Applications of this Sensor are:-

• Time Attendance System
• Door Lock/ Unlock
• Security Systems
• Screen Lock/Unlock

• Connect the Vcc and Power Supply Pin(Green and White Wire respectively) of the Fingerprint Scanner to the 3.3V pin of the Arduino UNO.
• Connect the Ground Pin(Red Wire) of the Scanner to the GND pin of the Arduino.
• Connect the Rx Pin(Black Wire) of the Scanner to the Digital Pin 3 of the Arduino.
• Connect the Tx Pin(Yellow Wire) of the Scanner to the Digital Pin 2 of the Arduino.
• And at last, Connect the IRQ Pin(Blue Wire) of the Scanner to the Digital Pin 6 of the Arduino.

In this way, The Fingerprint Scanner is connected to the Arduino UNO and is ready to be coded. So now we need to connect the Arduino to our PC for the next step.

• Adding a new fingerprint: For this operation, we need to place our finger on the Scanner you will see a blue light blink. Keep finger placed there until the yellow light blinks three times and then release the finger. This shows that the scanner has entered the fingerprint adding mode and as our fingerprint is not already added to the scanner that's why it would show unregistered on the Serial Monitor and assign an ID to the same. After that, we need to put our finger on the scanner again and wait till the yellow light blinks and then we can release the scanner. We need to repeat this process of placing the finger on the scanner and releasing two more times and in total three times to add our fingerprint. As we complete the scanning for the third time we will see a green light in place of the yellow light. This shows that the fingerprint is added successfully and the same can be seen on the serial monitor as well.

• Testing a Fingerprint: Now we can test the added fingerprint by placing the thumb on the scanner again. This time we have to remove our finger after the blinking of the blue light and we will see that the green light turns on and a message on the Serial monitor will appear saying successfully matched with the ID of the fingerprint.

Deleting the Fingerprint: For deleting the fingerprint we need to place our finger on the scanner and keep it placed there until the red light blinks. First of all, a blue light will blink which is the option for testing the fingerprint. After that, a yellow light will blink which is the option for adding a new fingerprint and in the end, the red light will blink which shows that the fingerprint is deleted and a message on the Serial monitor will show that the Fingerprint with ID No. is deleted. After deletion, If we place our finger on the scanner for testing, The red light will blink and the serial monitor would show a message saying that the Fingerprint not matched.

There you need to select the COM Port and Baud rate and you are ready to use the software. There are a lot of operations that can be performed using that software such as viewing the image of the fingerprint captured, Perform a check of the fingerprint, and many more.