Hello friends here are some latest final year ECE projects:
1
DTMF Controlled Robot: This simple DTMF based Cell phone
controlled robotic vehicle circuit is designed without using microcontroller
and is used in industries and surveillance systems.
2
Bluetooth Controlled 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.
3
Metal Detecting Robot: Here, we use a metal detection robot
which works on RF technology. 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.
4
Password based Circuit Breaker: This password based circuit
breaker project is built using 8051 controller and is used to switch off the
power supply to the line by entering a password.
5
Auto 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.
6
Line Following Robotic Circuit using Microcontroller: This
line follower robot is a basic robot that follows a specific path indicated by
a line having some particular width.
7
Contactless Digital Tachometer using 8051 Microcontroller:
Here we designed a simple non-contact tachometer using microcontroller which
can measure speed with an accuracy of 1 rev/sec.
8
Density Based Traffic Signals 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.
9
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.
10
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 8051 microcontroller. It is used in industries
to control the liquid level automatically.
11
Solar Battery Charger: This is a simple circuit to charge
6V, 4.5Ah rechargeable Lead-acid battery from the solar panel. 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.
12
Car Battery Charger: 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.
13
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.
14
FM Radio Circuit: FM Radio circuit is the simple circuit
that can be tuned to the required frequency locally. This article describes the
circuit of FM radio circuit. This is a pocket sized radio circuit.
15
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.
16
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.
17
Bidirectional Visitor Counter using 8051: 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.
18
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.
19
LED Lamp using USB: 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.
20
Water Level Indicator: This Water Level Indicator project
employs a simple mechanism which helps to detect and indicate the water level
in an overhead tank or any other water container. It can be used in Hotels,
Factories, Homes Apartments, Commercial Complexes, Drainage, etc.
21
Password Based Door Lock System: This system demonstrates a
password based door lock system wherein once the correct code or password is
entered, the door is opened and the concerned person is allowed access to the
secured area. After some time, the door would be closed. Read this post
completely to get more information.
22
Human Detector 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.
23
GSM 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).
24
Temperature Controlled DC Motor 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.
25
Water Level Alarm Using 555 Timer: This is a simple and low
cost hardware project using a 555 timer circuit. The aim of this project is to
design a water level detecting alarm with simple and low cost hardware without
compromising on the performance of the device.
26
5 Channel IR Remote Control System using Microcontroller:
This article is aimed to design and demonstrate a simple 5 channel remote
control system to drive five loads. This circuit works on the principle of IR
communication.
27
Bipolar LED Driver Circuit: This bipolar LED driver circuit
is very useful at the places where flashing of light is required, as in beacon
flashing. This circuit can be mainly used for indication purposes.
28
Celsius Scale Thermometer using 8051 Microcontroller: This
Celsius Scale Thermometer circuit is designed using at89c51 and lm35. 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.
29
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.
30
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.
31
Boolean algebra Calculator: This Boolean algebra calculator
is an interesting project which is more useful in our real life by working as a
portable calculator to simplify the Boolean expression on the fly. In our
circuit, we use Boolean algebra simplification methods like the Quine-McCluskey
algorithm to simplify the Boolean expression and display the output on the
display.
32
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.
33
Mobile Jammer Circuit: This circuit is used to block the
signals of cell phones with in the range of 100 meters. This circuit can be
used in TV transmission and also for remote controlled toys or play things.
34
Unbiased Digital Dice with LEDs: This is a circuit diagram
of digital dice which is nearly unbiased. By using this circuit, there is no
chance to cheat as the circuit operates at such a high speed that the circuit
is almost imperceptible to the human eye.
35
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.
36
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.
37
Simple 100W Inverter Circuit: This is a small Inverter circuit
which converts the direct current (DC) to alternating current (AC).
38
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.
39
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.
40
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.
41
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 signalling purpose and many more.
42
Dancing Bi-Colour 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-colour LEDs for sequential running light.
43
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.
44
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.
45
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.
46
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.
47
Battery Charger using SCR: Here is the circuit diagram of
battery charger circuit using Silicon Controlled Rectifier. SCR can be used in
half wave rectifier, full wave rectifier, inverter circuits, power control
circuits, etc.
48
FM Bugger Circuit: 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.
49
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.
50
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.
51
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.
52
Continuity Tester with Melody: 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.
53
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.
54
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.
55
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.
56
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, and it can deliver
high current, can work for long time with high efficiency and is very low cost.
57
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.
58
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.
59
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.
60
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.
61
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.
62
Simple FM Radio Jammer Circuit: This is a Jammer circuit
which is used to block the signals. Jammer circuit produces the high frequency
signal which will confuse the receiver of particular system from receiving the
signal, even though circuit is working properly, user of the system feels that
circuit is not working properly.
63
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.
64
Battery Charger Circuit: This battery charger circuit works
on the principle of controlling switching of an SCR based on charging and
discharging of battery.
65
Interfacing 16x2 LCD with 8051: This is a simple circuit diagram
which helps to describe interfacing of 16X2 LCD module to AT89C51which is a
8051 family microcontroller.
66
PWM LED Dimmer Using NE555: 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.
67
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.
68
Wireless Switch Circuit using CD4027: 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.
69
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.
70
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.
71
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.
72
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.
73
100w Subwoofer Amplifier Circuit: Here is the circuit
diagram and working of 100w subwoofer amplifier circuit. A Subwoofer is a
loudspeaker which produces audio signals of low frequencies.
74
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.
75
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.
76
555 Timer IC Testing Circuit: This is a simple 555 IC
testing-circuit which tests your entire 555 timer IC. So before using your IC,
you may check whether your IC is good or bad by using this circuit.
77
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.
78
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.
79
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.
80
Luggage Security Alarm: This is a simple alarm circuit which
helps in ringing a warning alarm when someone tries to steal the luggage.
81
9 Way Clap Switch Circuit: This circuit helps you to manage
your appliances in your home by just clap without moving from your bed.
82
12V to 24V DC Converter Circuit: This is another kind of
circuit which helps to convert 12V DC current to 24V DC current.
83
230V LED Driver: Here we design a simple circuit driving a
series of LED from 230V AC. This is accomplished using a capacitor based power
supply. This is a low cost and efficient circuit and can be used at homes.
84
3X3X3 LED Cube: This is a simple a simple LED cube circuit
designed without using microcontroller. It is based on the principle of driving
LEDs using the clock pulses.
85
Monostable Multivibrator Circuit Operation: Here is the
monostable multivibrator circuit diagram and working. Multivibrator is an
electronic circuit which will work as two stage amplifier operating in both
stable and astable mode.
86
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.
87
LED Lamp Dimmer Circuit: In this circuit, at the starting
LED glows slowly, then grown brighter and once again slowly it became dim. The
basis of the whole circuit is an operational amplifier IC named LM358.
88
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.
89
LED Christmas Lights Circuit: This is a simple circuit used
to decorate your house by building Christmas lights using LEDs. The lights will
get ON at night and OFF in morning time.
90
Audio Equalizer Circuit: The circuit is used to change the
tune/melody into a different pitch level by devoid of loss in the tune. It is
mainly useful to music lovers.
91
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.
92
150W Power Amplifier Circuit: Here we designed a power
amplifier circuit using push pull class AB configuration to derive a power of
150W to drive a load of 8 Ohms (speaker).
93
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.
94
Digital Temperature Sensor: The main principle of this
circuit is to display the digital temperature value. These are mainly used in
environmental applications.
95
Digital Stopwatch Circuit: This is a simple circuit that
displays count from 0 to 59, representing a 60 second time interval. It
consists of a 555 timer to produce the clock pulses and two counter ICs to
carry out the counting operation.
96
Toy Organ using 555 Timer IC: This is the circuit diagram of
simple Toy Piano using 555 Timer IC. It produces different tones or sounds
depending on the frequency range.
97
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.
98
Low Power Audio Amplifier using 555 Timer: This is a simple
low power audio amplification circuit designed using 555 timer. It can be used
to develop low power music systems used in vehicles.
99
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.
100
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.
101
Reaction Timer Game Circuit: This is a simple and funny game
circuit which contains 10 LEDs that are moving in an arbitrary fashion and we
have to target a particular LED given by your challenger.
102
Police Siren Circuit using NE555 Timer: This circuit
produces a sound similar to the police siren. You may also get detailed
information about pin diagram and internal block diagram of NE555 timer.
103
100W MOSFET Power Amplifier Circuit: A power amplifier
circuit using MOSFET has been designed to produce 100W output to drive a load
of about 8 Ohms.
104
Digital Voltmeter Circuit using ICL7107: Here we designed an
analog to digital converter working as a digital voltmeter using a low power
three and half digit A/D converter ICL7107 having internal 7 segment decoders,
display drivers, a reference and a clock.
105
8 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.
106
2 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.
107
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.
108
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.
109
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."/>
110
Police Lights using 555 Timer: 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. This flashing
action performs continuously. This circuit uses 555 timer and a decade counter.
111
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.
112
Ding Dong Sound Generator Circuit: This is ding dong sound
generator circuit is designed using 555 timer IC in astable mode. It can be
used as doorbell. With some modifications, it can be used to produce different
sounds. Read this post for complete details.
113
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.
114
TV Remote Control Jammer: This proposed TV jammer circuit
confuses the infrared receiver in a TV by producing the constant signal that
interferes 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.
115
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.
116
RF based Home Automation System: Here we have used RF434 MHz
modules to make wireless remote. Using this remote, we can control the
appliances within the range of 100 meters. It is used for remote control
applications like burglar alarm, car door alarm, calling bell, security
systems, etc.
117
High and Low Voltage Cut-off with Delay and Alarm: This high
and low voltage cut off with delay alarm circuit is an advanced automatic
voltage stabilizer circuit and is used to protect our home appliances. Its cost
is less as compared to voltage stabilizers.
118
Dummy Alarm Circuit: The main principle of the circuit is to
flash an LED for every 5 seconds. The circuit consists of 7555 timer IC as main
component.
119
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.
120
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.
121
One Transistor Electronic Code Lock System: The main
principle of this circuit is that the door lock opens only when the buttons are
pressed in an order. The transistor and diode plays a main role in the circuit.
122
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.
123
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.
124
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 behaviour of wild animals where
human beings cannot reach.
125
Digital Voltmeter using 8051 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.
126
Ultrasonic Rangefinder using 8051: 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.
127
Stepper Motor Interfacing with 8051 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.
128
Frequency Counter Circuit: Here we design a simple frequency
counter system using two timers and two counters. While one of the Timer IC is
used to produce clock signals, the other is used to produce the time limited
signal of one second.
129
Delay using 8051 Timers
130
Interfacing 7 Segment Display to 8051: This article
describes you how to interface seven segments to AT89C51 microcontroller. This
system displays the digits from 0 to 9 continuously with a predefined delay.
131
LC Meter using 555 Timer: This is a simple LC Meter circuit
designed using 555 Timer and 8051 microcontroller. It is mainly used to measure
value of a reactive element like a capacitor or an inductor.
132
TV Transmitter Circuit: The main principle of this circuit
is to transmit the audio and video signals. Here audio signals are frequency
modulated and video signals are PAL modulated. These modulated signals are
applied for the antenna.
133
DC Motor Interfacing with 8051 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.
134
Stun Gun Circuit: This Stun gun circuit is mostly used as a
weapon to stun or send shock waves to the target with the intention to weaken
or paralyze it.
135
Transistor Intercom Circuit: This transistor intercom
circuit is a simple two way intercom circuit which is used for the dual purpose
of sending as well as receiving signals.
136
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.
137
Wailing Siren Circuit: The main principle of this circuit is
to produce a wailing siren. The 555 timer IC is operated in astable mode. When
the switch is pressed, speaker produces high pitch siren and when it is
released, its pitch decreases and is switched off after 30 seconds.
138
Audio Tone Control Circuit: This article explains you how to
design an audio tone control circuit with the gain of around 25. This design
needs less number of components and it is cost effective.
139
FM Remote Encoder/Decoder Circuit: This is a simple post
which shows you how to design FM remote encoder and decoder circuit using
RF600E and RF600D ICs. This pair of encoder and decoder ICs establishes the
communication with high level security. The operating voltage of these ICs is
from 2V to 6.6V DC.
140
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.
141
Interfacing GPS with 8051 Microcontroller: In this
interfacing of GPS with 8051 circuit, GPS module calculates the position by
reading the signals that are transmitted by satellites.
142
How to Interface Real Time Clock with PIC18F: Get an idea
about RTC, PIC Microcontroller pin diagram and how to interface RTC with
PIC18F. RTC is an integrated circuit which keeps track of current time.
143
Random Number Generator using 8051: 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.
144
Active Audio Crossover Circuit: Audio crossover is an
electronic filter used in audio applications to send the appropriate signal to
the speakers or drivers. This circuit is used in HiFi audio systems to separate
the frequency bands from audio signal.
145
IR Audio Link Circuit: This simple IR audio link circuit is
used to transmit audio signals wirelessly. This IR audio link is able transmit
audio signals up to 4 meters.
146
Cell phone 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.
147
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.
148
Digital Clock using 8051: 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 8051 controller.
149
GSM Interfacing with 8051: The main principle of this
circuit is to interface a GSM modem with the microcontroller. The microcontroller
used is AT89C51 microcontroller.
150
Multi-Channel Audio Mixer Circuit: This audio mixing circuit
has 2 MIC inputs and 2 line inputs. If you want to increase the input channels
according to the application then add same circuit in parallel with the existing
circuit.
151
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.
152
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.
153
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.
154
USB Sound Card Circuit: This USB sound card circuit is a
device which allows an embedded system to create and record real and high
quality sound. Read this post for more details.
155
Hi-Fi Dx Bass Circuit: This Hi-Fi Dx Bass Circuit describes
the design, principle and operation of a two stage bass boosting circuit using
simple high and low pass filters.
156
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.
157
Programmable Switching Control for Industrial Automation in
Repetitive Nature of Work
158
Automatic Wireless Health Monitoring System in Hospitals for
Patients
159
Precise Digital Temperature Control
160
Optimum Energy Management System
161
Security System Using Smartcard Technology
162
PC Based Electrical Load Control
163
Secret Code Enabled Secure Communication Using RF Technology
164
Programmable Load Shedding Time Management for Utility
Department
165
Object Detection by Ultrasonic Means
166
Tampered Energy Meter Information Conveyed to Concerned
Authority by Wireless Communication
167
Distance Measurement by Ultrasonic Sensor
168
Portable Programmable Medication Reminder
169
Programmable Energy Meter for Electrical Load Survey
170
Security System With User Changeable Password
171
Networking of Multiple Microcontrollers
172
Solar Powered LED Street Light with Auto Intensity Control
173
SCADA (Supervisory Control & Data Acquisition) for
Remote Industrial Plant
174
Parallel Telephone Lines with Security System
175
Using TV Remote as a Cordless Mouse for the Computer
176
Movement Sensed Automatic Door Opening System
177
Railway Level Crossing Gate Control through SMS by the
Station Master or the Driver
178
GSM Based Monthly Energy Meter Billing via SMS
179
DTMF Based Load Control System
180
Synchronized Traffic Signals
181
Pick N Place with Soft Catching Gripper
182
Fire Fighting Robotic Vehicle
183
War Field Spying Robot with Night Vision Wireless Camera
184
Theft Intimation of the Vehicle over SMS to Owner Who Can
Stop the Engine Remotely
185
Closed Loop Control for a Brushless DC Motor to Run at the
Exactly Entered Speed
186
Automatic Surveillance Camera Panning System from PC
187
Flash Flood Intimation over GSM Network
188
RFID security access control system
189
Integrated Energy Management System Based on GSM Protocol
with Acknowledgement Feature
190
Cell Phone Based DTMF Controlled Garage Door Opening System
191
Display of Dialled Telephone Numbers on Seven Segment
Displays
192
Automatic Dialling to Any Telephone Using I2C Protocol on
Detecting Burglary
193
Life Cycle Testing of Electrical Loads by Down Counter
194
GSM Based Energy Meter Reading with Load Control
195
BLDC Motor Speed Control with RPM Display
196
Predefined Speed Control of BLDC Motor
197
Stamp Value Calculator for Postage Needs
198
Dish Positioning Control by IR Remote
199
Railway Track Security System
200
IR Obstacle Detection to Actuate Load
201
Automatic Dusk to Dawn (Evening on to Morning Off)
202
Rhythm Following Flashing Lights
203
Thermistor Based Temperature Control
204
Object Counter with 7 Segment Display
205
Incoming Phone Ring Light Flasher
206
Solar Power Charge Controller
207
Wire Loop Breaking Alarm Signal
208
Video Activated Relay to Control the Load
209
Touch Controlled Load Switch
210
Time Delay Based Relay Operated Load
211
Electronic Eye Controlled Security System
212
Fastest Finger Press Quiz Buzzer
213
Pre-programmed Digital Scrolling Message System
214
Speed Checker to Detect Rash Driving on Highways
215
Home Automation Using Digital Control
216
Four Quadrant DC Motor Speed Control with Microcontroller
217
Intelligent Overhead Tank Water Level Indicator
218
Speed Synchronization of Multiple Motors in Industries
219
Pre Stampede Monitoring and Alarm System
220
Unique Office Communication System Using RF
221
PC Controlled Scrolling Message Display for Notice Board
222
Touch Screen Based Industrial Load Switching
223
Touch Screen Based Home Automation System
224
Speed Checker to Detect Rash Driving on Highways
225
Wireless message Communication between Two Computers
226
Obstacle Avoidance Robotic Vehicle
227
Solar Powered Auto Irrigation System
228
Auto Metro Train to Shuttle between Stations
229
Touch Screen Based Remote Controlled Robotic Vehicle for
Stores Management
230
RFID Based Passport Details
231
Beacon Flasher Using Microcontroller
232
Discotheque Light Stroboscopic Flasher
233
IR Controlled Robotic Vehicle
234
Automatic Bell System for Institutions
235
RFID Based Device Control and Authentication Using PIC
Microcontroller
236
Theft Intimation of Vehicle over SMS to Owner Who Can Stop
the Engine Remotely
237
Solar Energy Measurement System
