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RF based Wireless Remote Control 175,462
Infrared (IR) sensor 87,741
Wireless motor control through RF 85,374
Automatic night lamp 68,775
Display System used in Restaurant 49,279
Piezo sensor as output 48,985
Darkness Detector Alarm 47,166
Traffic light signal 46,502
USB Mobile Charger Circuit Diagram 41,276
DTMF Decoder 40,207
Water level controller cum indicator circuit diagram 39,872
Light sensor using photodiode 38,648
Working of light dependent resistor 35,826
Relay activation using TSOP 1738 34,916
Remote Control For Home Appliances 34,690
Touch switch 32,564
Audio amplifier 31,530
Fire alarm 30,767
Remote Controlled Toy Car 30,287
Intruder alarm / Burglar alarm based Home Security System 29,245
Single switch motor on/off.. Clockwise/anticlockwise 27,100
Music (Data) transfer by IR by amplification 25,365
Liquid level Alarm 24,073
Color distinguished using LDR/Color sensor using LDR 23,791
Darkness detector 23,541
Water Sensor Circuit 22,761
Shadow Alarm using LDR 22,301
Variable power supply 21,498
Generating time delay with 555 IC 20,877
H-bridge using transistor 20,796
Wireless Switch Circuit Diagram 20,117
Automatic light/dark indicator 19,842
Water Tank Overflow Alarm 19,400
RF based Intruder Alarm 18,936
9-Way Clap Switch Circuit Diagram 18,204
Power failure alarm 17,885
Night Lamp using 555 17,257
RF based Fire Alarm (Overheat Alarm) 17,169
BCD to 7 Segment display Circuit 17,041
555 Timer As Amplifier 16,792
Magic Eye Circuit Using 4049 IC 16,730
Water level indicator with display 16,517
2 in 1 Doorbell 16,297
Dancing LED's 16,114
Music (Data) transfer by IR 15,659
Automatic Wash Basin Tap Controller 15,617
Long range IR 15,535
Bathroom Light Off Timer 15,456
Light detector 15,310
2-1 Quiz Buzzer 15,277
Voltage Doubler Circuit Using IC555 15,219
555 Timer IC Tester 14,831
Electronic Letter Box 14,643
Remote Control for Devices using Cell Phone 14,325
Simple AC to DC converter using bridge rectifier 13,145
Understanding Decade Counter CD4017 13,084
Battery Level Indicator 12,939
Light dependent frequency variation using LDR 12,800
Piezo sensor as input 12,734
Timer Circuit using IC CD 4060 12,725
Transistor Tester Circuit Diagram 12,471
Fixed voltage power supply 12,432
Electronic Dice Circuit 12,405
Opamp as comparator 12,223
Transistor as audio amplifier 12,215
Seismic sensor 12,042
Low pass filter 11,900
Inverting amplifier using 741 11,746
Automatic Fan Speed Regulator 11,708
Touch Switch Circuit using 555 Timer 11,633
Relay control by sound 11,431
Electronic Code Lock Circuit 11,389
Soil Moisture Detector 11,351
Two Way Intercom 11,011
Full range centigrade temperature sensor 10,836
Bi Color LED 10,559
Electronic Circuit: Digital Stopwatch 10,492
Line Following Robot 10,464
Overheat/Overcooling circuit breaker 10,435
Led Flasher Circuit 10,402
Sound Operated Switch 10,353
Magic Eye using 555 Timer IC 10,071
Sound Operated LED 9,876
Understanding JK flip flop using CD4027 9,868
Astable mode by NAND gate 9,854
Electronic Door Bell 9,824
Electronic Timer Circuit 9,802
Active high trigger for 555 in monostable mode 9,750
High Pass Filter Circuit 9,657
Vehicle Indicator Circuit 9,649
Automatic Washroom Light Controller 9,640
Cell Phone Based Multiple Device Controller 9,583
Water Level Indicator with Display 9,519
LDR Based Automatic Lamp 9,460
Transistor based Security Alarm 9,412
IC 555 Based Message Display Circuit 9,362
Relay operation using Darlington Pair 9,291
Day and Night Indicator using IC 555 9,227
Relay control through mic 8,928
Interfacing 4026 with 7 segment display 8,925
Security Alarm for Doors, Almirah, cupboards using Opam 8,921
Metronome 8,873
Differential amplifier 8,698
Sound Generation using 555 8,514
Luggage Security Alarm 8,500
Random Number Generator Using 7 Segment Display 8,449
Voltage boost by using a resistor with 78XX 8,264
Simple RPM Counter using IC 555 8,229
4 Player Quiz Buzzer 8,150
Humidity Detector Circuit 8,127
NAND gate monostable 8,054
Electronic alarm for cash box, lockers 7,983
Exhaust Fan Circuit Diagram 7,893
Refrigerator Door Alarm 7,882
Understanding NOR Gate (CD4001) 7,859
90 Second Timer 7,802
Smart DC fan 7,642
Periodically Turning On & Off Mosquito Repellent Circuit Diagram 7,599
Security System 7,528
Vehicle Indicator 7,484
Hearing Aid 7,479
Clock with LED pendulum with tick tock sound 7,440
Parked Vehicle Indicator 7,422
Timer Based Code Lock 7,333
Electronic Code Locking System 7,186
Obstacle Avoiding Robot 7,180
Negative supply using 555 IC 7,021
NOT gate monostable 6,963
IR to RF Converter 6,925
Classroom Mic 6,913
LED Based Stop Watch 6,888
CD4049 Based LED torch 6,884
Reminder Alarm 6,843
Toggle flip flop using CD4013 6,721
LED Lamp Using CA3140 IC 6,719
NE 555 Timer based Automatic Headlight 6,697
Tone generator Circuit Diagram 6,673
IC555 based Multicolor LED Lamp Circuit Diagram 6,591
Variable power supply and charger with emergency light 6,575
Coin Toss/Flip Simulator Circuit 6,516
Conversion of NAND gate to Basic gates 6,462
UM3561 IC Based Security Alarm 6,415
Electronic Mosquito Repellent Circuit 6,414
8 Player Quiz Buzzer 6,337
Curtain Opener Circuit 6,324
Voltage Doubler Circuit Using IC 4049 6,266
Car Reverse Horn 6,220
Multi Color Lighting 6,170
Non inverting amplifier 6,166
Variable Power Supply From Fixed Voltage Regulator 6,118
Audio Amplifier using Opam 6,079
Transistor Based Secret Bell 6,062
Electronic Lock using Switches 6,049
Secure room access system 6,005
Suitcase Security Alarm 5,967
Number Guessing Game 5,966
Safety Alarm Circuit 5,931
Timer Circuit using IC 4026 5,867
Window and Door Guard with Light Sensor 5,841
CD 4027 Based Emergency Lighting System 5,828
Night Lamp with Timer for Stairs 5,803
Fading LEDs 5,716
PC Temperature Controller 5,599
Porch Light (Auto Turn Off Light) Circuit Diagram 5,503
DIY – Homemade Melody Door Bell 5,501
Inverting amplifier 5,484
CD 4060IC based Message Display Circuit 5,473
Polarity cum Continuity Tester 5,453
CD 4013 based Sound Sensing Module 5,444
CD 4013 Based Two Way Switch 5,419
Flip Flop based Staircase Switch 5,416
Multitone Generator Circuit 5,391
Toggle switch using CD4017 5,359
Reaction Timer Game 5,328
Simple Stepper Motor Driver using 555 Timer IC 5,321
Sound generation in audio range 5,276
LED Based Pendulum Circuit 5,236
Crossing Light Indicator 5,149
Intruder Alarm 5,116
Remote Tester Circuit 5,114
Multi Sound Buzzer 5,076
CD 4060 Based Security Alarm 5,055
Automatic Power OFF timer for CD player 4,868
Sound Scanner Circuit 4,868
Electronic Thermometer for Beverage Temperature Measurement 4,858
Coin Toss Circuit on 7 Segment Display 4,776
"Hit the Target" Game 4,446
Notepad Lamp 4,374
Multi-Utility Flashing Light 4,350
NOR Gate as SR Flip Flop 4,127
Conversion of NOR gate to Basic gates 4,080
NAND Gate as SR Flip Flop 4,066
FSK Modulators using IC 555 4,062
Multipurpose Timer With Musical Alarm 4,033
CD4001 IC based Lighting System 3,892
Inverting amplifier with signal feedback 3,870
Pre Set Off Timer 3,813
Electronic Number Game 3,794
Spell Effect Sign Display Circuit 3,772
Amplifier for Musical ICs 3,485
2-Digit Object Counter 3,470
Simple 2 Digit Auto-Manual Counter 3,316
ASK Modulator using 555 Timer IC 3,239
DIY: LASER Based Pulse Transmitter and Receiver 3,227
Direction Pointer 3,136
Auto and Manual Pulse Generator 3,056
Circuit Diagram to Automatically Hibernate your PC 3,009
Logic State Indicator 2,932
DIY : Short Range Optical Pulse Transmitter and Receiver 2,720
Zero Cross Detector (ZCD) Circuit 2,630
Waveform Generator using LM741 2,516
DIY: Make Remote Operated Light Fountain 2,479

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