![]() The push button is directly connected to pin D14(ENROL),D15(DEL), D16(UP) and D17(DOWN) of Arduino with respect to ground And Yellow LED is connected at Digital pin D7 of Arduino with respect to ground through a 1k resistor and Green LED is connected to D6 of Arduino with the same method. The circuit of this Arduino Fingerprint Security System is very simple which contains Arduino which controls whole the process of the project, push button, buzzer, and LCD. Servo motor is responsible for open and closing of the gate. The user may customize gate/door opening and closing according to their requirement. After 5-seconds gate will be closed automatically. When placed finger will be valid Green LED will glow for five second and gate also opens at the same time. Now the user may check it was deleted or not by placing the same finger over the finger print module and pressing MATCH key (UP/Down key). Now LCD will let you know that finger has been deleted successfully. Now user needs to select ID and press OK key (same DEL key). Now if the user wants to remove or delete any of stored ID then he/she need to press DEL key, after pressing DEL key, LCD will ask for select location means select ID that to be deleted. Check the Video below for full demonstration. By the same method, the user can add more fingers. Now user can open the gate by placing the same finger that he/she have added or enrolled into the system and then press MATCH key (UP/Down key). Now finger print module takes an image and converts it into templates and stores it by selected ID in to the finger print module’s memory. Now user needs to put his finger again over finger print module. Then LCD will ask to remove the finger from finger print module and again ask for placing the finger. Now user needs to put his finger over finger print module. Now LCD will ask for placing finger over the finger print module. After selecting Location/ID user needs to press an OK key (DEL key). So now user needs to enter ID (Location) by using UP/DOWN keys. To do this user need to press ENROLL key and then LCD asks for entering location/ID where finger will be a store. First of all, the user needs to enroll finger with the help of push button/keys. In this project, we have used a gate that will be open when we place stored finger at the finger print module. Working of this Fingerprint Sensor Door Lock is easy. Yellow LED indicates gate is closed and Green LED indicates gate is opened. Here we have also attached a cardboard box with a Servo Motor to act as a security gate, which will only open when the system will read correct Finger Print. Check the Video at the end for full demonstration. UP/DOWN keys also support Finger print match function. DEL/OK key also has same double function like when user enrolls new finger then he/she need to select finger ID or Location by using another two key namely UP/MATCH AND DOWN/MATCH (which also has double function) now user needs to press DEL/OK key (this time this key behaves like OK) to proceed with selected ID or Location. Means enroll key has both enrollment and back function. Now if at this time user do not want to proceed further then he/she can press enroll key again to go back (this time enroll key behave as Back key). Means when the user wants to enroll new finger then he/she needs to press enroll key then LCD asks for the ID or Location where user wants to store the finger print output. Enroll key is used for enrolling new finger impression into the system and back function as well. Here we are using 4 push buttons to Enroll/back, Delete/OK, UP and Down. In this Arduino Fingerprint Sensor Project, we have used Fingerprint Sensor Module to take finger or thumb impression as input in the system. ![]() Here all the process is commanded by Arduino like taking an image of finger print, convert it into templates and storing location etc. ![]() In this post, we will Interface a Fingerprint Sensor Module with Arduino and will build a Fingerprint based Biometric Security System with door locking. Finger Print is considered one of the safest key to lock or unlock any system as it can recognize any person uniquely and can’t be copied easily.įinger Print Sensor Module or Finger Print Scanner is a module which captures finger’s print image and then converts it into the equivalent template and saves them into its memory on selected ID (location) by Arduino. Some examples are PIR based Security System, RFID based Security System, Digital Lock System, bio-matrix systems, Electronics Code lock. There are many types of security systems available to secure our place. Security is a major concern in our day to day life, and digital locks have become an important part of these security systems.
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