Automated in this type of practice anyone can access

Automated Lab Administrator

G.Prabhakaran1, R.Vignesh2,

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1,2,3Electrical and Electronics Department, Kongu Engineering College

[email protected]

[email protected]

[email protected]


Abstract- This project is set to overcome the
drawbacks faced by the users in the computer laboratories. Normally in computer
laboratory, if a user wants to access the computer he/she has to make his/her
entry in the lab logbook which is paper based. This consumes a lot of time for
the users to access the computer .Also, in this type of practice anyone can
access the computer without making his/her entry in lab logbook, which is
unsecure. And the laboratory in-charge cannot be able to maintain the entries
for a long time since it is paper based. The proposed project is set to
automate laboratories with the help of biometric fingerprint sensor to turn ON
the computer and also their entry will be recorded in the database. The module
consists of biometric fingerprint sensor, LCD display, Arduino uno and relay.
In this project, fingerprints of all users are first recorded in the database
of fingerprint module. When a user enters the laboratory he/she has to place
his/her fingerprint in the biometric fingerprint sensor if he/she is a
registered user then automatically a particular computer will be allotted and
it will be turned ON and their entry is recorded. If the user is non-registered
then none of computers will be allotted. The user can turn OFF the computer
either manually or the user can place his/her fingerprint. After the departure
of the user that computer will be free for the next user.


Keywords— biometric, relay, Arduino, computer
laboratories, fingerprint module


is a form of identifying pattern in humans. Based on the pattern of ridges and
valleys of human fingers it can be recognized and matched with the pre-stored
patterns. It consists of sensors that are optical, ultrasonic, thermal,
capacitive, etc., but mostly optical and capacitance scanning methods are used.
In this project, a fingerprint module is interfaced to a microcontroller with a
serial interfacing, and this project uses a relay, an LCD. This type of
authentication for controlling devices and appliances is highly secured and
more reliable at a lower cost due to inexpensive microcontroller. This can also
be implemented as the main registration system for computer centres in colleges
and offices by adding external memory. The working of this project involves
three stages which are mainly registering the user followed by the user
authentication and finally turning ON the computer for the registered user. The
drawbacks of the previous system are mainly the time consumed while the user
registers and also time taken for turning on the system. The feasibility of the
project comes right from the authentication procedure which guarantees secured
access and also it prevents any confusion regarding which user occupied a
particular system. By the help of secured access we can be able to curb all the
drawbacks of the present system. It helps in numerous ways like reducing time
consumption and also decreasing the work done in registering every time while
entering the laboratory. The processing of this project commences from the
registration followed by the control send by the controller to the pc
displaying the user entry and also it is the job of the controller to turn on
relays for the turning ON the systems. The registration of the user will be
done with the help of fingerprint module and done only once for the user. Hence
with the entry of the authenticated user the system is allocated to the user
and also the PC is turned ON for the usage.  


Literature Review

Based Attendance System Using Microcontroller and LabView”  by Devendra Kumar Yadav , Sumit Singh, Prof.
Shashank Pujari, Pragyan Mishra UG Student, Dept. of ECE, Sambalpur University
Institute of Information Technology, Odisha, India which had the concept of
fingerprint based attendance system which helped in enabling the knowledge of
registering and counting user entry.

Recognition Using Level 3 Feature Extraction Method” by Chandra Prakash Singh ,
Susheel Jain , Anurag Jain M.Tech., RITS Bhopal/ RGPV Bhopal, India which
depicted various methods by which the fingerprint gets stored and how it is
been carried over the entire process.This paper explains deeply about the
various algorithms involved in the creation of the fingerprint image and the
process of collecting information from it.

“Fingerprint Based Attendance Management
System with SMS Alert to Parents” by 
Sopan D. Borale , Poonam G.Chaudhari,Vaijanti B. Patil ,Apurva
,D.Shingne.This project also stated about the creation of an attendance based
system and also involved some other concepts like the sending of messages
through GSM which gave some additional information but not necessary for our

“Fingerprint Based Security
System For Banks” Atar Nasrin, Awatade Veda , Hegadkar Rani , Bansude
Vijaysinha which helped us to get a deep knowledge of how the security is
ensured with the authentication. It also gave some details regarding the output
of certain devices with Arduino and it helped a very great way to this project

“Development of fingerprint
biometric attendance system for non academic staff in tertiary Institution” by
Adewole K.S.This system takes attendance electronically with the help of a
fingerprint recognition system and all records are saved for subsequent operations.
Staff biometric attendance system employs an automated system to calculate
attendance of an staff in an organization and do further calculation of
attendance summary


Proposed system

Automated lab administrator holds the
importance in rejecting the paper and pen based registration of the user in the
computer laboratories and working of the project as shown in figure 1. The
supply is taken from the 230V AC power supply which is stepped down with the
help of a step down transformer(230/12)V. Using a bridge rectifier IC and a 5V
regulator IC constant DC supply is given to the controller (Arduino) which gives
the control signals to the various devices. Enrolment is made with a
fingerprint scanner. The next step is finding the entry of the registered user
and displaying the presence of a certain user inside the laboratory with the
help of serial port of Arduino. It also helps to find which user is present
inside the laboratory and the next step is the allocation of a system whenever
a user makes his entry. The user will be allocated a system which will be
displayed and in case if no systems are available then the display will
indicate no more systems are available and finally the output of the relay is
given to the PC for instant turn ON. The output of the relay is been monitored
by the Arduino which is the status of the load. The status of the load is used
to indicate the absence of further more systems to accommodate user entry


Fig.1 Block Diagram


Components used


Arduino is
an open source software platform and also hardware available for implementation.
It comprises of a controller which is mainly ATmega series and also terminals
for connecting the peripherals. The coding in this microcontroller is very easy
and user friendly. Hence multiple application controls can be done using Arduino.


fingerprint module which is used here is R305 Fingerprint module. R305 Fingerprint Sensor can easily be connected
to Arduino with the help of MAX232 IC shown in figure 2. This Fingerprint
scanner is capable of storing and comparing the fingerprint and accordingly
giving the desired output.

Fig.2 MAX232 Pin configuration



The LCD display used in this project
is 16X2 cross section and its description is given. 16×2 LCD is named so because it has 16 Columns and 2
Rows. There are a lot of combinations available like, 8×1, 8×2, 10×2, 16×1,
etc. But the most used one is the 16X2 LCD; hence it is used here. The 16×2 LCD
display is a very basic module commonly used in circuits. The
16×2 translates on a display 16 characters per line in 2 such lines.


Relays are used to provide electrical contact by the
application of control signals. There are many different kinds of Relays. The
Relay that we have used for this project is the electromechanical relay. It
acts upon receiving the control signals from the microcontroller. With the help of few
mechanical parts and based on the property of an electromagnet a connection is
made with the contacts.



A. Fingerprint module with

The figure 3 shows the pin configuration of the
fingerprint module to be connected with the Arduino. It can be connected
directly or with the help of the MAX 232 module. In this project interfacing is
done with the help of the interfacing module

Fig 3 Fingerprint module pin

The inputs are given to the module in two ways namely
triggering the function of fingerprint sensor by the onboard switch and Add,
Empty or Search or by Making pin low from external microcontroller for 5ms as
per function required to be executed. The Outputs (Response) are of two ways
which are monitor output response after a function is executed and Onboard LEDs
which displays ERROR or OK Read byte after executing function.

B.LCD interfacing with Arduino

The Pins in the LCD display 4 to 7 are connected to
the four pins 0 to 3 of the Arduino board. The Register select(Rs) and
Enable(E) pins are connected to the pins 4 and 5 of the Arduino respectively.Vss
of the LCD is connected to the GND while the Vss is connected to the power
supply. RW pin is connected to ground.


C.Relay interfacing with Arduino

Fig 4 Relay module pin configuration

The relay module comprises of the pind namely NC(Normally
closed) ,NO(Normally Open),C(Common).The module can be either operated in NO or
NC configuration which depends upon the code we give to the controller.The
relay module is inbuilt with the protection devices which can protect the
equipment from Voltage surges.The relay is provided with a 230V supply and the
control of 5V is given from the Arduino.Pins 4,5,67,Vcc,GND are connected to
the arduino to the Relay module.



This project is used to automate the computer
laboratories by the biometric fingerprint scanner to turn ON the computer
automatically. The LED indicates the turning ON the components of the hardware.
The hardware setup of the proposed project is shown in the figure 5.The module
consists of biometric fingerprint sensor, LCD display, Arduino uno, power
supply unit and relay. This project can be made to control
various devices in the laboratory rather than PC like it can invoke the control
of printer operation. This could be able to set the verification of the users
who are accessing the printers. The project could also be extended for all the
different kinds of jobs rather than implementing in colleges alone. This could
be used in workplaces too so that time saving can be made.

Fig 5.Hardware implementatin of the




This project work proposed a biometric based
laboratory automation system by using Arduino uno, relay, fingerprint sensor,
LCD display. Fingerprint of students were enrolled and unique ID was provided
to each fingerprint. After authentication of the user the computer is turned
ON. This project helps the students to make their entry inside the laboratory.
As it is a fingerprint system it cannot be faked. This system can be
implemented in all schools, colleges for the computer laboratories.



We take this
opportunity to express our gratitude towards all respected personalities who
had guided, inspired and helped us in the successful completion of this paper.
First and foremost, we express our thanks to The Lord Almighty for guiding us
in this endeavour and making it a success



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Yuan1 Yao Lixiu1 Zhou Fuqiang2,”A Real Time Fingerprint Recognition System
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Fan Wang, Zhengyong Huang, Hui Yu, Xiaohua Tian,
Xinbing Wang, Jinwei Huang”EESM-based Fingerprint Algorithm for Wi-FiIndoor
Positioning System”2013 2nd IEEE/CIC International Conference on Communications
in China (ICCC): Wireless Networking and Applications
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Pablo David Gutiérrez, Miguel Lastra, Francisco
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