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RF based Wireless Remote Control 150,730
Wireless motor control through RF 72,826
Infrared (IR) sensor 66,403
Automatic night lamp 61,237
Traffic light signal 37,975
DTMF Decoder 34,316
Water level controller cum indicator circuit diagram 33,121
Light sensor using photodiode 32,317
Relay activation using TSOP 1738 31,434
Working of light dependent resistor 29,639
Touch switch 28,605
USB Mobile Charger Circuit Diagram 27,614
Audio amplifier 25,814
Intruder alarm / Burglar alarm based Home Security System 24,277
Fire alarm 24,155
Single switch motor on/off.. Clockwise/anticlockwise 23,567
Music (Data) transfer by IR by amplification 23,206
Liquid level Alarm 21,572
Color distinguished using LDR/Color sensor using LDR 20,106
Remote Control For Home Appliances 18,893
Variable power supply 18,806
Darkness detector 18,607
Remote Controlled Toy Car 18,055
Generating time delay with 555 IC 17,806
Shadow Alarm using LDR 17,514
Water Sensor Circuit 17,111
H-bridge using transistor 17,081
RF based Intruder Alarm 16,685
Automatic light/dark indicator 16,642
Power failure alarm 14,757
RF based Fire Alarm (Overheat Alarm) 14,586
Water Tank Overflow Alarm 14,130
2 in 1 Doorbell 13,886
Wireless Switch Circuit Diagram 13,712
555 Timer As Amplifier 13,160
Music (Data) transfer by IR 13,146
Night Lamp using 555 13,093
Light detector 12,217
Water level indicator with display 12,126
2-1 Quiz Buzzer 12,013
9-Way Clap Switch Circuit Diagram 11,912
Long range IR 11,769
Voltage Doubler Circuit Using IC555 11,667
Magic Eye Circuit Using 4049 IC 11,472
Light dependent frequency variation using LDR 11,027
555 Timer IC Tester 10,879
Bathroom Light Off Timer 10,396
Dancing LED's 10,350
Fixed voltage power supply 10,208
Inverting amplifier using 741 10,138
Electronic Letter Box 10,081
Seismic sensor 9,945
Relay control by sound 9,831
BCD to 7 Segment display Circuit 9,782
Opamp as comparator 9,606
Piezo sensor as input 9,573
Low pass filter 9,438
Transistor Tester Circuit Diagram 9,323
Transistor as audio amplifier 9,293
Simple AC to DC converter using bridge rectifier 8,834
Full range centigrade temperature sensor 8,820
Electronic Dice Circuit 8,815
Touch Switch Circuit using 555 Timer 8,672
Timer Circuit using IC CD 4060 8,439
Overheat/Overcooling circuit breaker 8,421
Bi Color LED 8,276
Astable mode by NAND gate 8,080
Led Flasher Circuit 8,044
Active high trigger for 555 in monostable mode 7,774
Automatic Wash Basin Tap Controller 7,661
Relay control through mic 7,425
Vehicle Indicator Circuit 7,407
Electronic Code Lock Circuit 7,404
High Pass Filter Circuit 7,370
Differential amplifier 7,186
Relay operation using Darlington Pair 7,182
Metronome 7,133
Sound Operated LED 7,007
Understanding Decade Counter CD4017 6,930
Electronic Timer Circuit 6,885
Voltage boost by using a resistor with 78XX 6,869
Sound Operated Switch 6,805
Remote Control for Devices using Cell Phone 6,676
IC 555 Based Message Display Circuit 6,620
NAND gate monostable 6,557
Battery Level Indicator 6,448
Security Alarm for Doors, Almirah, cupboards using Opam 6,439
Electronic alarm for cash box, lockers 6,355
Sound Generation using 555 6,217
Electronic Door Bell 6,119
90 Second Timer 5,885
Periodically Turning On & Off Mosquito Repellent Circuit Diagram 5,817
Vehicle Indicator 5,784
NOT gate monostable 5,762
Negative supply using 555 IC 5,752
Luggage Security Alarm 5,715
Electronic Circuit: Digital Stopwatch 5,594
Refrigerator Door Alarm 5,561
Piezo sensor as output 5,472
Automatic Fan Speed Regulator 5,409
4 Player Quiz Buzzer 5,348
Security System 5,252
Understanding JK flip flop using CD4027 5,226
Magic Eye using 555 Timer IC 5,175
Random Number Generator Using 7 Segment Display 5,164
Tone generator Circuit Diagram 5,149
Water Level Indicator with Display 5,087
Non inverting amplifier 5,042
CD4049 Based LED torch 4,960
Parked Vehicle Indicator 4,865
Audio Amplifier using Opam 4,819
Soil Moisture Detector 4,812
Multi Color Lighting 4,775
Two Way Intercom 4,704
Voltage Doubler Circuit Using IC 4049 4,692
Interfacing 4026 with 7 segment display 4,690
Coin Toss/Flip Simulator Circuit 4,673
LED Lamp Using CA3140 IC 4,580
Night Lamp with Timer for Stairs 4,542
Line Following Robot 4,482
NE 555 Timer based Automatic Headlight 4,442
Reminder Alarm 4,428
Darkness Detector Alarm 4,427
Transistor based Security Alarm 4,415
Humidity Detector Circuit 4,407
CD 4060IC based Message Display Circuit 4,375
Timer Based Code Lock 4,363
Transistor Based Secret Bell 4,351
Understanding NOR Gate (CD4001) 4,350
Inverting amplifier 4,349
Secure room access system 4,312
Toggle flip flop using CD4013 4,282
Electronic Code Locking System 4,224
Sound generation in audio range 4,215
Exhaust Fan Circuit Diagram 4,186
LDR Based Automatic Lamp 4,134
Conversion of NAND gate to Basic gates 4,107
IC555 based Multicolor LED Lamp Circuit Diagram 4,090
Variable power supply and charger with emergency light 4,079
IR to RF Converter 4,034
UM3561 IC Based Security Alarm 4,008
Clock with LED pendulum with tick tock sound 3,999
CD 4013 based Sound Sensing Module 3,941
Automatic Washroom Light Controller 3,906
Safety Alarm Circuit 3,894
Variable Power Supply From Fixed Voltage Regulator 3,892
Display System used in Restaurant 3,813
Flip Flop based Staircase Switch 3,727
Fading LEDs 3,713
Number Guessing Game 3,626
CD 4013 Based Two Way Switch 3,542
CD 4027 Based Emergency Lighting System 3,515
LED Based Pendulum Circuit 3,512
Automatic Power OFF timer for CD player 3,512
Suitcase Security Alarm 3,479
Obstacle Avoiding Robot 3,448
Multitone Generator Circuit 3,420
Cell Phone Based Multiple Device Controller 3,411
Timer Circuit using IC 4026 3,405
Multi-Utility Flashing Light 3,390
Car Reverse Horn 3,369
Polarity cum Continuity Tester 3,369
Curtain Opener Circuit 3,333
Remote Tester Circuit 3,311
Porch Light (Auto Turn Off Light) Circuit Diagram 3,305
CD 4060 Based Security Alarm 3,210
LED Based Stop Watch 3,208
PC Temperature Controller 3,164
Intruder Alarm 3,139
Window and Door Guard with Light Sensor 3,072
Classroom Mic 3,057
Inverting amplifier with signal feedback 3,053
Electronic Lock using Switches 2,942
Electronic Thermometer for Beverage Temperature Measurement 2,829
Conversion of NOR gate to Basic gates 2,752
Toggle switch using CD4017 2,748
8 Player Quiz Buzzer 2,713
NAND Gate as SR Flip Flop 2,712
Coin Toss Circuit on 7 Segment Display 2,669
CD4001 IC based Lighting System 2,627
Hearing Aid 2,622
Multipurpose Timer With Musical Alarm 2,569
NOR Gate as SR Flip Flop 2,556
Reaction Timer Game 2,416
Crossing Light Indicator 2,404
Notepad Lamp 2,378
Spell Effect Sign Display Circuit 2,369
Pre Set Off Timer 2,360
"Hit the Target" Game 2,330
Multi Sound Buzzer 2,289
Sound Scanner Circuit 2,271
Electronic Number Game 2,146
Amplifier for Musical ICs 1,954
Direction Pointer 1,678
Circuit Diagram to Automatically Hibernate your PC 1,537
Logic State Indicator 1,474
Simple Stepper Motor Driver using 555 Timer IC 1,130
Auto and Manual Pulse Generator 848
Simple 2 Digit Auto-Manual Counter 611
Zero Cross Detector (ZCD) Circuit 517
DIY : Short Range Optical Pulse Transmitter and Receiver 266

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