How to make Metal Detector – Final Year Project

Hi friends, today we are going to build a very useful circuit which is Metal Detector. We all know about Metal Detector equipment which is widely used at security points. Same kind of Metal Detector we are going to build today. Our circuit is more powerful which can detect the presence of metal inside walls. If you want to drill a hole in walls, we can use this Metal Detector to check if there is any metal pipe like gas pipeline or water pipes, etc.

Features of Metal Detector:

  1. Detection Range: 8 cm (3″ approx.)
  2. Power supply: 9V Battery
  3. Power consumption: 30mA max.
  4. Output form: LED or/and Buzzer

Components required:

  1. Coils: It consists of two windings around the ferrite core. Winding L1 has 120 turns and winding L2 has 43 turns. We are using copper wire having 0.3mm thickness.
  2. Diode (D1): 1N4148
  3. Zener diode (ZD1): 3V9
  4. Resistors: R1=330Ω, R2=R3=470Ω, R4=2.7KΩ, R5=10KΩ
  5. Capacitors: C1=1200pF or 3300pF, C2=47nF
  6. Transistors: T1=T2=T3=BC547B
  7. LED (LD1): 5mm red
  8. Trim potentiometers: RV1= 2.5KΩ, RV2=100Ω
  9. Push button SW1

Circuit Diagram of Metal Detector:

Metal detector circuit diagram
Metal detector circuit diagram

Test and Adjustments:

  1. Connect a 9V battery to the circuit.
  2. Keep the circuit where there is no metal in the vicinity.
  3. Turn preset RV1 fully clockwise.
  4. Turn RV2 fully anti-clockwise.
  5. Depress the push button and hold it during the final adjustments.
  6. Now turn RV1 anti-clockwise till red LED goes out.
  7. Now turn RV2 clockwise until the red LED weakly lit.
  8. Now when metal comes in the vicinity of circuit red LED will be more brightly lit.

You can observe that we have one buzzer in the circuit. This buzzer is optional. If you want the output of the circuit in the form of a buzzer, you can connect the buzzer as shown in the diagram.

I hope you liked this article. If you have any queries, feel free to ask in the comment section below. Like our facebook page and subscribe to our newsletter for future updates.

Sound Activated LED Kit – Mini Project

Hi friends, today we are going to build another interesting electronic circuit which is sound activated LED kit. We can use this circuit for sound indicator applications or sound to the light unit in the music application. This project is also useful for hearing-impaired people. By use of this circuit, doorbell sound or phone ring sound produces light indications and thus hearing-impaired people can also perform a particular action.

Sound Activated LEDs

This circuit requires simple electronic components which you can easily find in any electronic components shop. There are no any expensive components in its circuitry, hence it’s a low-cost mini project. You can build this project for your second or third year engineering submissions. Let us build sound activated LED circuit step by step.


  1. Resistors:
    10KΩ: (R1)
    330KΩ: (R2)
    100KΩ: (R3, R4, R5)
    47Ω: (R6, R7, R8, R9)
    1.5MΩ: (R10, R11, R12)
    47KΩ: (R13, R14)
  2. LED: 5mm (LD1, LD2, LD3, LD4)
  3. Transistors: BC547 (T1, T2, T3) and BC557 (T4)
  4. Capacitor: 100nF (C1, C2, C3) and 100μF (C4)
  5. Potentiometer: 220K (RV1)
  6. MIC1

Circuit Diagram:

Sound Activated LED
Sound Activated LEDs Kit


As shown in the circuit diagram of sound activated LEDs, we have used a 220K potentiometer. The sensitivity of this circuit can be varied by using this potentiometer. We have used a built-in microphone (M300) for sensing the sound waves.

Power consumption for this circuit is near around 0.5mA min./12mA max. It requires a 8 to 15V DC power supply. You can also use a 9V DC battery.

Features of Sound activated LED kit:

  1. Intermediate level
  2. Power consumption: 0.5mA min./12mA max.
  3. It has adjustable sensitivity
  4. Require small area for installation
  5. low cast and effective circuitry

I hope you liked this sound activated LED Kit. Try to build your own and let me know if you found any difficulties in it. Please share your comments below. Like our facebook page and subscribe to our newsletter for future updates. Have a nice day!

How To Build Home Made Electric Fan Regulator – Mini Project

Hi friends, in this article we will see one simple mini project for electronics and electrical engineering students. We all are familiar with electric fan regulator which we use for varying the fan speed. The basic principle behind regulator is change of resistance.

This article is written by: Mohamed Maricar & Modified by: Mayuresh Joshi

Cheap and Best Electrical Fan Regulator

Electric Fan Regulator
Fig (A): shows the full view of connection diagram of the product
Fig (B): shows full view of the product and external side
Fig (C): shows the PCB without resistance


Components required:

  1. One Resistance = Rs. 0.15
  2. 28 Resistances = Rs.4.20
  3. One PCB = Rs.5.00
  4. One Rotator Switch = Rs. 8.00
  5. One Plastics Cabinet = Rs.5.00
    Total Cost = Rs. 22.20 Rupees Only

Steps to build electric fan regulator:

  1. First we have to take PCB as shown in Fig (C)
  2. Then we put the Resistance and solder in PCB holes as shown in fig(A)
  3. Now we connect PCB ends with rotator switch as in fig (A)
  4. We connect rotator switch with ac supply
  5. Now if we vary the rotator switch we can get the different speed of motor
    1. The Resistance network is used to drop the voltages in five steps that is level
    2. The first step 13 volts dropped second steps 26 v third step 39v fourth step 53v
    3. By dropping the five levei used to vary the speed of motor
    4. By dropping voltages we can vary the speed of electrical fan motor
  • What is my idea?
    My idea is to design a new circuit to reduce the cost and increase the performance of the product
  • What does it do?
    It regulate the speed of electric fan motor by dropping a.c. voltage in different level
  • How does it works?
    It is working by Ohms law and circuit theory principles
  • What makes my idea Unique?
    Cheap and best

Advantages of my product

  1. Cheap cost
  2. Low care
  3. Low power loss
  4. Low heat loss
  5. Good performance

I hope you liked this article. Like our facebook page and subscribe to our newsletter for future updates. Feel free to ask any queries in comment section below.

Accidental Vehicle Lifting Robot – Mini Project

Nowadays number of road accidents increasing frequently. Whenever vehicle accident occurs on the road there may be high possibility of traffic. In such cases if we could able to move that accidental vehicle from road, we can easily avoid the traffic. To make this possible we can built an accidental vehicle lifting robot using embedded system. You can built its prototype using small vehicle which you can easily found in toy store.

Accidental Vehicle Lifting Robot

Accidental Vehicle Lifting Robot

Working of Accidental Vehicle Lifting Robot

The working of this project is based on microcontroller which is connected to a motor to move the accidental vehicle. Also microcontroller is connected to a chain based rod to lift the vehicle.

The complete circuitry of this project contains microcontroller board which has robotic platform, keypad, electric motors to move the vehicles and lifting the chain based rod. These motors will be moved accordingly to the instruction given through keys connected to microcontroller.

Components required:


  • AT89c52
  • Robot platform
  • Driver circuit
  • Motor for lifting
  • Controlling keys
  • 12 v battery


  • Embedded ‘C’
  • RIDE/KEIL to write code
  • ISP to burn the chip

Advantages Accidental Vehicle Lifting Robot:

  • Low cost
  • automated operation
  • Low Power consumption

I hope you liked this project idea. Please like our facebook page and subscribe to our newsletter for upcoming projects. If you have any queries feel free to ask in comment section below. Have a nice day!

Sending SMS from No Signal Area – Mini Project

Hi friends, in previous article we have seen Zigbee and GPS project which tracks a vehicle. Today we will build another innovative electronic project which will send a SMS from No Signal Area. There are many locations where we get poor range or completely no range. So using this embedded system we can send a SMS from such locations. The only condition we need here is, we should have a mobile network at the receiving end of Zigbee module.

This is low cost project and highly innovative. You can build such projects for your final year engineering submissions also.

Sending SMS from No Signal Area


The main objective of this micocontroller project is to send a SMS from No Signal area which is also known as Black Spot area using Zigbee and GSM module.



  1. 8051 family development board
  2. power Supply
  3. Zigbee modules
  4. GSM modem.
  5. Max232


  1. Embedded ‘C’
  2. RIDE to write code
  3. ISP to burn the chip

Block Diagrams:

Zigbee Transmitter Block Diagram

Sending SMS from No Signal Area Transmitter Block Diagram

Zigbee Receiver Block Diagram

Sending SMS from No Signal Area Receiver Block Diagram

Power Supply:

Power Supply


As already stated, this project is useful for creating signal, using GSM module we can send SMS through that signal to destination. In this project we are using two different frequencies. Zigbee has frequency 2.4GHz and GSM has frequency 1800 MHz.

Main circuitry of this project contains two embedded development boards. One contain Zigbee and Keypad and other contain Zigbee and GSM. We need to place first board in No signal (Black spot) area. Other development board which contains Zigbee receiver and GSM module is kept in area where there is mobile network.

When you type a message using keyboard and hit enter from No signal area, Zigbee transmitter will send a signal with message to the receiver end. Receiver end of Zigbee also has GSM module which will send that SMS to destination mobile.

Watch this Video:

I hope you liked this Project. Please share it with your friends and like our facebook page for future updates. If you have any queries please feel free to ask in comment section below. Have a nice day!


Final Year Engineering Projects for Instrumentation Engineering

Hi friends, in this article we will see some innovative project ideas. You can make use of these projects to build your engineering projects. These projects are specially for Instrumentation, electrical and electronics students.

In this post we will just discuss what type of innovative projects you can make for your final year projects. In upcoming posts we will see how we can build all these projects step by step.

Instrumentation Engineering Final Year Projects

Front Panel of Temperature Controller

1) RF Based Load Automation for smart home

Nowadays, modern houses and organisations are gradually shifting from conventional control system to centralised control system. This centralised control system make use of RF remote control to operate the equipment.

We can build this centralised control system by use of RF Transmitter, Receiver, micro controller, Encoder, Decoder, Switches and relays. This project costs near around 3000Rs – 4000Rs.

2)   Home Automation using TV Remote

This project looks very interesting and impressive as it involves home automation using our TV remote control. Infrared signals transmitted by remote control will get captured by sensor interfaced to control system. All the loads which you want to automate are connected to control system through relays.

Future scope of this project: You can enhance this project based on radio signal instead of Infrared signal of remote control. This will increase operating range so that you can operate equipment which are far away.

3) Recognition of Vehicle Number Plate using MATLAB

This is also one interesting project for Instrumentation Engineering students. In this project we are using just MATLAB so this project is also cost effective.

Here we capture the image of Vehicle number plate and by use of Image processing in MATLAb we can extract the data from that image. MATLAB will recognise the numbers from number plate and will show it as output.

4) Temperature control system using LabVIEW and Arduino

In this project we make use of LabVIEW and Arduino. To measure the temperature we can use any temperature sensor like thermistor, RTD, etc. We connect these sensors to analog pins of Arduino which will be interfaced to LabVIEW.

We can set our desired logics in LabVIEW to operate the heating elements. These heating elements are connected to arduino through relayes.

See also: Temperature controller using LabVIEW and Arduino

In upcoming posts we will see some more interesting projects for instrumentation and electrical engineering students. I hope you liked these project ideas. Like our facebook page and subscribe to our newsletter for future updates.

Wi-Fi Based Industrial Automation – Mini Project

Hi friends, in this project we will see How to automate industrial equipments using Wi-Fi network. We are going to operate electrical equipment from central control point. This is low cost and flexible mini project which you can use for your final year project. It is also secured industrial automation system.

Wi-Fi Based Industrial Automation

Components Required:

  1. Rabbits Processor – RCM5600W
  2. RS 232 cable
  3. PC
  4. Industrial equipments to be controlled using Wi-Fi network

Block diagram


Block diagram for Industrial automation




In this automation system, devices to be operated are connected to the Rabbit’s processor. You can see devices like Fan, Heater and electric bulb are connected through Realy circuit. Please read Data sheet of Rabbits Processor for details. The current status (on, off) of the device is sent over the web page which is accessed by end user. For this you need a PC which is connected to the Rabbits Processors Wi-Fi  network.

When end user sends an action for operating any device, it will be received by Rabbits Processor and get executed. In this way automation of industrial equipments will take place using Wi-Fi.

Industrial Automation
Source: RCM5600W Datasheet (

I hope you liked this project. If you too have some interesting projects, you can share with us and earn money too! Please share this with your friends and like our facebook page for upcoming projects.

List of Final Year Projects for Instrumentation Engineering

Hello friends. It is very important to choose a good project in your final year of engineering. Your project should be attractive, innovative and more important is its output. If you successfully built a project and obtain its output you will definitely get good grades. So always choose a project for your final year which will be implementable (means you can get all its hardware), and you will be able to get its output.

Final Year Engineering Projects

Following is a list of Final year engineering projects for Instrumentation and Control Engineering students.

1) Machine Vision Based Object Sorting

This project is based on Machine vision. You can use a digital camera of your mobile or a separate camera for detecting objects. A conveyor can be used to move objects from one place to other. Whenever defective product or unwanted product is passed over particular point a camera will detect that product and will be sort out. You have to use LabVIEW or Matlab for image processing.

2) Temperature Control System using PLC

PLC is one of the core subject in Instrumentation and Control Engineering. So it will be impressive if you use PLC in your project. To built a Temperature Control System using PLC you can use RTD or Thermistor and a Heater. Whenever temperature rise above predefined level a coolant (water) can be circulated surrounding the tank. When temperature goes below set point a heater will get automatically on. You can use a PID controller for better controlling action than on off control. This is really a good final project for  Instrumentation and control Engineering students.

3) Automatic Bottle filling project using PLC

This is also a good project for fnal year. Its hardware is attractive and use of PLC in the project will impress your external. In this project you can use a conveyor for bottle (cups) passing. IR sensor will detect the presence of bottle. At the same time it will stop the conveyor. By generating a timer in PLC a Solenoid valve will start filling bottle. When timer is completed solenoid valve will be closed and conveyor will get start.

4) Automatic Irrigation System

This is an intersting project and involves measurement of soil moisture using Hygrometer. Hygrometer is easily available sensor or ebay or amazon.  Whenever soil moisture decreases a pump will get start and water will wet soil. Thus no need of human for watering plants or farm. You can use and arduino for analog reading and its digital output pins will operate pump on and off.

5) Home automation using PLC

In this project we can control home appliances like fan, Bulb, etc. using PLC. You can make use of Relays to connect home appliances with PLC.

6)PC Based Wireless transmission of process parameters

This is also a good final year project for Instrumentation and Control engineing students. In this project you can transfer readings of  process parameters like temperature, flow, pressure, etc. from one PC to other wireless. For this you can use ZigBee.

7) Auctioneeing Control System using LabVIEW

Auctioneering Control System

This is really a core instrumentation project. In this project you are going to control the temperature of sytem using auctioneering control system. It means measuring parameters at different location and control action will be taken based on most approriate reading. Same hardware as that of Temperature control system using PLC discussed above can be used. Except PLC you can use LabVIEW and Arduino.

You may also like:

  1. Final year engineering projects list 1
  2. Final year engineering projects list 2
  3. Final year engineering projects list 3

I hope these are ideas will help you for your final year engineering project. If you liked this website please like our Like our facebook page for future updates. Have a nice day!

Temperature Controller Project using LabVIEW and Arduino

Hi friends, here we are going to build a small engineering project based on LabVIEW and Arduino. In this project we are making Temperature controller using Arduino and LabVIEW. We will operate a cooling fan when the temperature goes above set point.

Before you start this project make sure that you have installed LabVIEW Interface For Arduino (LIFA) on your system. If not follow this article for installing LIFA: How to Interface Arduino with LabVIEW

Components required:

  • Arduino Uno (or Freeduino)
  • 10K ohm resistor
  • Thermistor (Click here to buy)
  • RGB LED (or separate LEDS can also be used)
  • DC fan (5V)


In this temperature controller project, we will use thermistor for measuring the temperature of liquid or any other material. We are using three LEDs to indicate temperature range. Red LED is used to indicate the temperature is above set opint. Blue LED will indicate temperature lies between upper and lower set point. Green LED will indicate temperature below set point.

Front Panel of Temperature Controller
Front Panel of Temperature Controller

When the RED LED glows the cooling fan will turned on. Due to cool air (or you can also use cooler water pump with relay circuitry) your object (liquid) will get cooled. When the temperature falls down DC cooling fan will get turned off.

Construction of Temperature Controller Project:

Interfacing thermistor with Arduino
fig 1: Interfacing thermistor with Arduino


Temperature controller using LabVIEW and Arduino
fig2: Temperature controller using LabVIEW and Arduino


  • Connect thermistor and Resistor with the analog port of Arduino as shown in first image.
  • Now connect three LEDs with positive terminals of each led to pin number 8,9 and 10. Connect negative terminal of LED with common (ground of arduino).
  • Now depends on your application i.e. if you are using small 5V dc fan you can connect it directly with the Arduino (pin number 3 and ground) using motor driver IC L293D (In figure we have connected motor directly but it should be not so. You should use motor driver IC). If you are using 230V AC appliance you need a relay circuit. You can buy it from here.

Download LabVIEW Program: Click Here

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Hope your Temperature controller project is working fine. If you have any doubts feel free to ask in comments. If you liked this article please share it with your friends and like our facebook page for future projects.

Temperature Indicator using PIC microcontroller

Hi friends, today we will see how to make temperature indicator using PIC microcontroller. The basic aim of this project is make you familiar with PIC microcontroller. It also explains how LM35 and 7 segment displays can be interfaced with PIC microcontroller.

Components required:

Following is a list of components required for temperature indicator using PIC microcontroller – mini project:

  • PIC microcontroller (PIC16F676)
  • 4 digit (or 3digit) seven segment display (Common cathode)
  • Temperature sensor (LM35) IC
  • 5V DC power supply

Circuit diagram:

Following figure shows circuit diagram of temperature indicator using PIC microcontroller.

Temperature Indicator Using Microcontroller
Temperature Indicator Using Microcontroller


In this mini project we have used PIC microcontroller and a four digit seven segment display is interfaced with it. For sensing the surrounding temperature we have used a temperature sensing IC i.e. LM35. You can use a voltmeter to crosscheck whether the indictor giving correct output or not. The output of the temperature in terms of volts will be in the range of mV.

Working of LM35:

LM35 is an integrated temperature sensor. It produces output voltage proportional to the temperature. The advantage of using LM35 is that it does not require any external calibration technique and it has accuracy of ±0.4 degree Celsius at room temperature. It draws only 60µA from supply and possesses low self heating. Thus the chances of error get minimized.

Download project content:

Click on the following link to download the project content. It consists of C program, Proteus design, HEX file for PIC microcontroller and circuit diagram.



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