Electronics / Electrical Projects Ideas

Android Phone /  Bluetooth Based Home Appliances Control System: This Project provides the controllability of your home appliances using your android phone.

Water Level Controller using Microcontroller: Here we are designing the circuit which is used to detect and control the water level automatically in overhead tank using Atmega8 microcontroller. It is used in industries to control the liquid level automatically.

Car Parking Guard Circuit Using Infrared Sensor: This circuit helps the person in the driving seat in such a way that it gives an alarm if there is any obstacle or a wall while parking or while driving in reverse. It is very useful in our real life.

Cell Phone Detector: This is a simple circuit which helps to detect the presence of an activated cell phone by detecting the signals in the frequency range of 0.9 to 3GHz. It helps in mobile phones tracking which are used for spying.

Bidirectional Visitor Counter using Microcontroller 8051 / Atmega8: This Bidirectional Visitor Counter Circuit is helpful to count the number of persons entering or leaving a room and to display it on a screen.

Password Based Door Lock / Unlock System Using 8051: This password based Lock/Unlock project is built using 8051 controller and is used to Lock/Unlock the door by entering a password.

Temperature Controlled DC Fan using Microcontroller: The main principle of the circuit is to switch on the fan connected to DC motor when the temperature is greater than a threshold value. This can be used in home applications and in cpu to reduce heat.

Automatic Intensity Control of Street Lights: This is a simple circuit that automatically controls the intensity of street lights which is designed using microcontroller and LEDs.

Line Following Robotic Circuit using ATMega8 Microcontroller: This line follower robot is a basic robot that follows a specific path indicated by a line having some particular width.

Digital Tachometer using Microcontroller: Here we designed a simple non contact tachometer using microcontroller which can measure speed with an accuracy of 1 rev/sec.

Home Appliances Control Using Remote Control With Microcontroller: This project used to control 3 AC loads, 4 10mm LED and 1 Buzzer through a simple TV remote.

LED Driver Circuit: As we know led needs constant current for a particular intensity. But if voltage fluctuates then it varies. This project provides constant current driver for leds.

Temperature Meter using Microcontroller: This circuit is designed using Atmega8 and lm35D. This circuit works on analog to digital conversion principle. It can be used at homes, mobile places like cars to keep a track of the temperature.

Density Based Traffic Signal System using Microcontroller: In this system, we use IR sensors to measure the traffic density. We have to arrange one IR sensor for each road; these sensors always sense the traffic on that particular road. All these sensors are interfaced to the microcontroller. Based on these sensors, controller detects the traffic and controls the traffic system.

Automatic Washroom Light Switch: This is a simple but very useful circuit in our real life which helps to automatically turn On the lights when a person enters the washroom and it automatically turns Off the lights when he leaves it.

Automatic Door Bell With Object Detection: This automatic doorbell with object detection circuit helps to sense the presence of a person or an object automatically and rings the doorbell.

Auto Night Lamp using High Power LED: This Auto Night Lamp is an interesting circuit which helps to turn ON the LED lights interfaced to it at night time and it turns OFF the lights automatically when it is day.

Mobile Jammer Circuit: This circuit is used to block the signals of cell phones .


Metal Detector Circuit: This is a simple metal detector circuit which is very useful for checking the person in shopping malls, hotels, cinema halls to ensure that person is not carrying any explosive metals or illegal things like guns, bombs etc.

Panic Alarm: This panic alarm circuit helps us to intimate others regarding our bad situation without any delay. It is more useful when an intruder entering our house or bad health status at which we are unable to intimate to the people around us.

Wire Loop Breaking Alarm: This circuit works as a continuity tester device which tests the continuity of the wire at hand. It is an indispensable tool to check broken wires and undesired shorting of wires.

Rain Alarm Circuit: Rain water detector will detect the rain and make an alert; rain water detector is used in the irrigation field, home automation, communication, automobiles etc. Here is the simple and reliable circuit of rain water detector which can be constructed at low cost.

Automatic Plant Irrigation System: This project circuit is more useful in watering plants automatically without any human interference. It is more useful when the owner is not present in the home for few days.

Hot Water Geyser Controller Circuit: This circuit is made to turn OFF geysers as soon as our water gets hot and are ready for bathing.

Lead Acid Battery Charger Circuit: Lead Battery is a rechargeable battery and is more useful in our real life as it will dissipate very little energy, it has very low energy to weight ratio, it can deliver high current, can work for long time with high efficiency and is very low cost.

Motion Detector Circuit: The motion detector is not only used as intruder alarm but also used in many applications like home automation system, energy efficiency system, etc. The motion detector will detect the motion of the people or objects and give the appropriate output according to the circuit.

Digital Voltmeter Circuit using Microcontroller

12 Channel Quiz Buzzer Circuit using Microcontroller: We built the circuit using a microcontroller which scans the input from push buttons and displays the corresponding number on a display device.

7 Digit Up Down Counter: The main principle of this circuit is to increment the values on seven segment displays by pressing the button. This circuit can be mainly used in scoreboards.

Bike Turning Signal Circuit: The objective of this circuit is to indicate left or right turn for bike/vehicle. Two identical circuits are needed, one is for left and the other is for right. The main heart of this circuit is 555 timer.

Automatic Changeover Switch: This is a simple automatic changeover circuit in which DC load like a series of LEDs are driven either by a battery or an AC-DC power supply.

UP/DOWN Fading LED Lights: This is a simple up/down fading LED lights circuit which can be used in shopping malls, home and security applications.

Police Lights using Microcontroller: This circuit simulates the police car lights by alternate flashing. This circuit flashes red LEDs for three times and blue LED’s for three times.

PWM based DC Motor Speed Control using Microcontroller: Here is a simple DC Motor speed control circuit designed using AVR Microcontroller. Here we use a technique called PWM (pulse width modulation) to control the speed of DC motor.


PIR Sensor Based Security Alarm: This article explains about PIR based security system in which PIR sensor is used instead of transmitter or receiver. This saves the power consumption and is low cost. This circuit can be used in the museums to protect the valuable things.

TV Remote Control Jammer: This proposed TV jammer circuit confuses the infrared receiver in a TV by producing the constant signal that interfere the remote control signal. If you switch on the circuit once, the TV will not receive any command from the remote. This allows you to watch your own program without anyone changing the channel or volume.

Super Sensitive Intruder Alarm: This circuit is designed to alert the user when an intruder enters into the home. If there is any obstacle in front of IR sensor, it generates an interrupt signal. This interrupt signal is given to the speaker to alert the user.

Remote Control Circuit through RF without microcontroller: Here we have used RF434 MHz modules to make wireless remote. Using this remote, we can control the appliances. It is used for remote control applications like burglar alarm, car door alarm, calling bell, security systems, etc.

High and Low Voltage Cutoff with Delay and Alarm: This high and low voltage cutoff with delay alarm circuit is an advanced automatic voltage stabilizer circuit and is used to protect our home appliances. It's cost is less as compared to voltage stabilizers.

Solar Battery Charger Circuit: This solar charger has current and voltage regulation and also has over voltage cut off facilities. This circuit may also be used to charge any battery at constant voltage because output voltage is adjustable.

Car Battery Charger Circuit: This article aims to describe the principle of operation, design and working of a simple car battery charger from AC mains supply and a feedback control section to control the battery charging.

Simple Inverter Circuit: This is a small Inverter circuit which converts the direct current (DC) to alternating current (AC).

Fire Alarm with Siren Sound: This circuit alerts us when there is a fire accident at home by ringing a siren sound instead of a buzzer.

Intelligent Unambiguous Night Lamp Switcher: This is the circuit diagram of unambiguous night lamp switch, which turns ON our domestic lights automatically when it is dark, without human interference. It also avoids repeated frequent switching of the devices which is usually ignored in most similar circuits but may have a detrimental effect on our operating devices.

Automatic Railway Gate Controller with High Speed Alerting System: The main aim of this project is to operate and control the unmanned railway gate in the proper manner in order to avoid the accidents in the unmanned railway crossing.

LED Flasher Circuit: LED Flasher is a simple circuit which will blink the LEDs in regular time period. This circuit can be used for decoration purpose or can be used for a signaling purpose and many more.

Dancing Bi-Color LED Lights Circuit: Generally we use small voltage bulbs in the dancing bulbs. This circuit is mainly used in the occasions, decoration articles or in visual indication sign boards etc. In this project, we use bi-color LEDs for sequential running light.

Thermistor Temperature Sensing Alarm: This circuit is a temperature sensing as well as alarm circuit. The circuit raises an alarm whenever the temperature crosses a certain limit.

Pull Pin Security Alarm System: This circuit helps us to get alerted when anybody picks our pockets or bags. The circuit is very helpful to prevent our goods getting pick pocketed.

Auto Turnoff Soldering Iron Circuit: This circuit helps the soldering iron to turn off automatically when it detects overheating and thereby avoids it from getting damaged.

Remote Operated Alarm Circuit: This circuit rings an alarm when you point a TV remote at it and press on any button. This can be used as a calling bell to call your assistant.

Battery Charger Circuit Using Mosfet: Here is the circuit diagram of battery charger circuit using Mosfet.

FM Bug: Here is small circuit with which you can listen to another people conversation from long distance using the normal FM radio set. This FM bugger circuit is kept in room where you want listen the conversation. You can listen to this conversation using the normal FM radio set.

Battery Powered Portable Light: This circuit is more helpful in handling unexpected and undesired darkness in our homes or offices. It provides considerable amount of brightness required to do our daily tasks.

IR Remote Control Switch: By using this circuit, we can control any house hold appliance with the help of remote. In this project, there are two parts – one is in transmitting section and the other is in receiving section. Receiving section will be in a stable position which is connected to any load and transmitter will act as a normal remote.

Cell Phone Controlled Robotic Vehicle: This is simple DTMF based Cellphone controlled robotic vehicle circuit without using microcontroller. It can be used in industries and surveillance systems.

Human Detection Robot using Microcontroller: The main principle of the circuit is to detect the human using human detection sensor. The wireless robot is operated manually using PC. The wireless technology used here is Radio Frequency technology. The data is transmitted to receiver through RF.

SMS Controlled Robot: GSM controlled robot or SMS controlled robot is a wireless robot which performs the necessary actions by receiving a set of instructions in the form a Short Message Service (SMS).

Remote Password Operated Electronic Home Appliances: This circuit explains you how to control the electrical appliances using an Android device. Here, Bluetooth module is interfaced to 8051 microcontroller. This Bluetooth receives the commands from the Android application device using wireless communication.

Metal Detector Robotic Vehicle: Land mines buried under the ground causes threat to the lives and affect the economy of the nation. Detection and removing of these mines manually is a dangerous task. So, we use a metal detection robot which works on RF.


Speed Control of DC Motor Using Pulse Width Modulation: This pulse width modulation technique is the more efficient way to proceed to manage the speed of our DC motor manually.

Sun Tracking Solar Panel: This article describes about circuit that rotates solar panel. This Sun tracking solar panel consists of two LDRs, solar panel, stepper motor and ATMEGA8 Microcontroller.

Touch ON and OFF Switch Circuit: This Touch ON/OFF Switch circuit is more useful in such a way that we can automatically ON or OFF any switch by touching a device without moving from our place.

USB Mobile Charger Circuit: This circuit is useful in charging the mobiles through USB outlet present in our laptops and PCs. For the charging of your mobile phone, this circuit provides you a regulated voltage of 4.7 volts.

Security Alarm Circuit: This circuit helps you to guard your precious documents as well as jewellery from intruders or theft. All you need is to just place this circuit in front of the locker or below the mat so when any unknown person come and walk over the switch, the circuit will trigger and sound of alarm comes.

Mosquito Repellent Circuit: Here is the simple electronic mosquito repellent circuit which can produce ultrasound in the frequency range of 20-38 kHz, which can scare away mosquitoes.


Automatic Street Light Controller Circuit Using Relays and LDR: This circuit helps in automatically turn ON/OFF the street lights using relays and LDR. The whole circuit is based on IC CA3140.


PWM LED Dimmer Using Switching regulator: The Pulse Width Modulation (PWM) plays an important role in controlling the circuits. We use this PWM to dim the intensity of light of the LED.

Simple Fire Alarm Circuits: Here are two simple fire alarm circuits which are used to detect the fire automatically and inform to the people immediately with an alarm.

Wireless Switch Circuit : This is a simple circuit which needs no physical contact with the appliance. In this circuit, all you need is to pass your hand above LDR to ON or OFF the switch.

Electronic Letter Box: This is a simple circuit which helps in finding out any letter dropped in our box by stopping the LED lights attached in this circuit.

Clap Switch Circuit for Devices: This is another simple but very useful circuit which helps to ON or OFF a device without moving from you place and also helps to control the speed of the electric devices like fan, etc.

12v DC to 220v AC Converter Circuit: Here is a simple voltage driven inverter circuit which converts 12v DC signal to single phase 220v AC using power transistors as switching device.

FM Transmitter Circuit: Here we built a wireless FM transmitter which uses RF communication to transmit the medium or low power FM signal. The maximum range of transmission is around 2 km.


DTMF Based Home Automation System Circuit: This is a simple and very useful circuit in our real life named DTMF controlled home appliances system. It helps to control the home appliances using DTMF technology.

Street Lights that Glow on Detecting Vehicle Movement: This article describes about the circuit that switches the street lights on detecting vehicle movement and remains off after fixed time. This system controls the street lights using light dependent resistor and PIR sensor.

Curtain Opener/Closer Circuit: This circuit will open and close the curtain of your home and office just by pushing a switch. So with the help of this unique circuit, we do not need to move from one place to open and close the curtain.

Variable Power Supply and Charger: This is a circuit which helps to check or test your electronic projects and also to charge the Mobile phone batteries. This circuit can also work as an emergency light.

LED Running Lights Circuit: This is a simple circuit consists of 9 LED lights in knight rider scanner mode. It will present an eye catching look as the LED initially travel in the one way and then travel reverse in the similar direction.

Luggage Security Alarm: This is a simple alarm circuit which helps in ringing a warning alarm when someone tries to steal the luggage.

12V to 24V DC Converter Circuit: This is another kind of circuit which helps to convert 12V DC current to 24V DC current.

Mains Operated LED Light Circuit: This is a simple circuit which is more useful to save our resources, energy and money by installing in your homes.

LED Lamp Dimmer Circuit: In this circuit, at the starting LED glows slowly, then grown brighter and once again slowly it became dim.

Variable Voltage Power Supply from Fixed Voltage Regulator: This Voltage regulator circuit is used to get fixed voltage at the output without depending on the input voltage.

Air Flow Detector Circuit: This Air flow detector circuit can be used to detect the flow of air in areas like car engine. It can also be used as temperature detector.


Microcontroller Based 7 Segment LED Display Decoder: This is the circuit diagram of display decoder which is used to convert a BCD or binary code into a 7 segment code used to operate a 7 segment LED display.

Digital Temperature Sensor: The main principle of this circuit is to display the digital temperature value. These are mainly used in environmental applications.

RFID based Attendance System: This simple RFID based attendance system is designed using ATmega8 Microcontroller and is mainly used in educational institutions, industries, etc. where authentication is needed.

Interfacing 16X2 LCD to AVR Microcontroller: This is a circuit which helps in interfacing 16X2 LCD with AVR Microcontroller. The Atmega16 belongs to the AVR microcontroller family.

Polarity cum Continuity Tester: With the help of this circuit, we can also identify whether the components we are using in our circuit are good or bad before mounting them on the PCB.

Reverse Parking Sensor Circuit: If you are a new driver then it is very difficult to judge the distance while parking the car. Reverse parking sensor circuit solves this problem by indicating the distance with the help of three LED’s. We can easily arrange this system at the back side of the car.

Automatic LED Emergency Light Circuit: This is the simple and cost effective automatic emergency light circuit with light sensing. This system charges from main supply and gets activated when main supply is turned OFF. This emergency lamp will work for more than 8 hours.

Automatic Battery Charger: This charger automatically shut off the charging process when battery attains full charge. This prevents the deep charge of the battery. If the battery voltage is below the 12V, then circuit automatically charges the battery.

Light Activated Switch Circuit: The main principle of this circuit is to switch ON the light when the LDR is illuminated. This circuit can be used in security applications like when there is darkness on the LDR, it stops lighting.

Remote Operated Spy Robot Circuit: This is a simple spy robot circuit which can be controlled by the remote. The maximum controllable range is 125 meters. It is used to observe the behavior of wild animals where human beings cannot reach.

Digital Voltmeter using Atmega8  Microcontroller: This is a simple digital voltmeter circuit designed using 8051 microcontroller. This circuit measures the input voltage from 0V to 5V. Here, the input voltage should be DC voltage to get the accurate output on LCD.

Ultrasonic Rangefinder using Microcontroller: This circuit explains you how to measure the distance using 8051 microcontroller. This ultrasonic range finder system measures the distance up to 2.5 meters at accuracy of 1 cm.

Stepper Motor Interfacing with Microcontroller: The main principle of this circuit is to rotate the stepper motor step wise at a particular step angle. The ULN2003 IC is used to drive the stepper motor as the controller cannot provide current required by the motor.

Interfacing 7 Segment Display to Microcontroller: This article describes you how to interface seven segments to atmega8 microcontroller. This system displays the digits from 0 to 9 continuously with a predefined delay.

DC Motor Interfacing with 8051/Atmega8 Microcontroller: Here is a simple but very useful circuit in our real life named interfacing DC motor with 8051 microcontroller. It describes you how to control the DC motor using AT89C51 controller.

LED Interfacing with 8051: The main principle of this circuit is to interface LEDs to the 8051 family micro controller. Commonly, used LEDs will have voltage drop of 1.7v and current of 10mA to glow at full intensity. This is applied through the output pin of the microcontroller.

Wireless Mobile Battery Charger Circuit: This circuit mainly works on the principle of mutual inductance. This circuit may be used as wireless power transfer circuit, wireless mobile charger circuit, wireless battery charger circuit, etc.

Battery Level Indicator: This article explains you how design battery level indicator. You can use this circuit to check car battery or inverter. So by using this circuit, we can increase the lifetime of battery.


LED Lamp Circuit using USB Port: This is a simple USB LED Light circuit which produces an output of 5v. It may be used as emergency light and also as a reading lamp.

Interfacing GPS with Microcontroller: In this interfacing of GPS with microcontroller circuit, GPS module calculates the position by reading the signals that are transmitted by satellites.

How to Interface Real Time Clock with Microcontroller: Get an idea about RTC, Microcontroller pin diagram and how to interface RTC with Microcontroller. RTC is an integrated circuit which keeps track of current time.

Random Number Generator using Microcontroller: This circuit helps to generate a random number in between 0 to 100 when push button is pressed and it may be used in the games like monopoly, snake ladder.

Cellphone Controlled Home Appliances: This mobile controlled home automation system is designed without using microcontroller. We can also control a robot using this technology by making some modifications.

Variable Voltage Power Supply: This helps to design a variable power supply circuit which will provide 0 to 28V at 6 to 8 amps. It can be used in various power amplifiers and oscillators to provide DC supply.

Digital Clock using Microcontroller: This circuit displays the time on LCD. For this clock, we can set the time at any instant. Here the clock works in 24 hour mode and the RTC chip is configured by programming Microcontroller.

GSM Interfacing with Microcontroller: The main principle of this circuit is to interface a GSM modem with the microcontroller. The microcontroller used is AT89C51 microcontroller.

Puff to OFF LED Circuit: The main principle of the circuit is to turn off the LED by a puff. The puff applied to the mic is converted into a voltage whose value is very small. This voltage is amplified and applied to the circuit in order to make the led turn off.

Biometric Attendance System: The main aim of this circuit is to take the attendance using biometric method and display when requested. This can be used in educational institutions, industries, etc.

Light Activated Alarm Circuit: The main principle of this circuit is to produce sound depending on the light intensity falling on the circuit. As the light intensity falling on the circuit increases, it produces pulses with more duration and thus producing more sound. The main part of the circuit is 555 timer IC.

Electronic Eye Controlled Security System: This is a simple electronic eye controlled security system circuit designed using 7805 voltage regulator and LDR. It is used in security applications.


Wireless Electronic Notice Board using GSM: This wireless electronic notice board using GSM Technology and microcontroller circuit is used to display the data on LCD whatever we sent from the mobile.

Working of light dependent resistor

Wireless Remote to Control 255 Different Appliances Individually

Wireless motor control through RF

Wireless message Communication Between Two Computers

Wireless Electronic Notice Board Using GSM

Wireless Control Of Robotic Arm

Wireless Audio Transmitter for TV

Water Tank Overflow Alarm

Water Sensor Circuit

War Field Spying Robot with Night Vision Wireless Camera

Voltage Doubler Circuit Using IC 4049

Voltage boost by using a resistor with 78XX

Voice Controlled WheelChair

Visually Camouflaged Vehicles for Military Purposes

Visual Monitoring and Alerting System for Restricted Areas

Vision Operated Home Automation For the Physically Disabled

Video Activated Relay to Control the Load

Vibration Alert System for the Deaf

Velocity Detector Using Ultrasonic Means

Vehicle Indicator

Variable power supply and charger with emergency light

Using TV Remote as a Cordless Mouse for the Computer

User Defined String Display and Marquee Scrolling using LED Array

UPFC Unified Power Factor Control

Unique Office Communication System Using RF

Understanding Decade Counter CD4017

Underground Cable Fault Distance Locator

UM3561 IC Based Security Alarm

Ultra Fast Acting Electronic Circuit Breaker

Turn ON at Night Light Controller with Single Sensor Ambiguity Elimination

Tsunami Detection and Social Broadcast System

Transistor based Security Alarm

Transistor Based Secret Bell

Transistor as audio amplifier

Transformerless Low Loss DC Converter

Touch Screen Based Remote Controlled Robotic Vehicle for Stores Management

Touch Screen Based Industrial Load Switching

Touch Screen Based Home Automation System

Touch Controlled Load Switch

Tone generator Circuit Diagram

Toggle switch using CD4017

Toggle flip flop using CD4013

Timer Circuit using IC CD 4060

Timer Circuit using IC 4026

Timer Based Code Lock

Timed Switch With User Defined ON and OFF Intervals

Time Delay Based Relay Operated Load

Thyristor Power Control by IR Remote

Thyristor Controlled Power for Induction Motor

Thumb Sized Adjustable Voltage Step Up Circuit

Three Phase Solid State Relay with ZVS

Three Phase Fault Analysis with Auto Reset on Temporary Fault and Permanent Trip Otherwise

Thermistor Based Temperature Control

Theft Intimation of Vehicle Over SMS to Owner Who Can Stop the Engine Remotely

Text to Speech Conversion For Indian Languages

Temperature Broadcaster to Twitter Using Arduino Ethernet Interface

Tampered Energy Meter Information Conveyed to Concerned Authority by Wireless Communication

Synchronized Traffic Signals at Various Junctions Using PIC Microcontroller

SVPWM Space Vector Pulse Width Modulation

Suitcase Security Alarm

Step Up 6 Volt DC to 10 Volt DC Using 555 Timer

Stamp Value Calculator for Postage Needs

Staircase Light That Turns ON and OFF Automatically When Required

Spell Effect Sign Display Circuit

Speed Synchronization of Multiple Motors in Industries

Speed Checker to Detect Rash Driving on Highways

Sound Operated Switch

Sound Operated LED

Sound Generation using 555

Sound generation in audio range

Solar Powered LED Street Light with Auto Intensity Control

Solar Powered Auto irrigation System

Solar Power Charge Controller

Solar mobile phone charger circuit

Solar Energy Measurement

The projects which are having more demand in engineering level and especially very useful for ECE and EEE students. We are all well known that we cannot imagine our life without electricity even for single day as it became a part in our life. So, it is very important and beneficial to us if we learn some basic things about electronics.

This electronics concept deals with various small and large circuits which may include concepts like diodes, batteries, resistors, integrated circuits, etc. These concepts are very interesting to learn also. As day by day its importance growing at rapid rate.

We always research for the new concept in electronics projects and electrical projects domain.

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