Sr. No Circuit Idea Rate1 Home Appliance Control Using TV Remote2 CCFL Tester for LCD Screens3 Laser Communication System4 Remote Control for Toy Car5 Wireless Extender for IR Remote Controls6 Telephone Line In-Use Indicator7 Laser-based Intruder Alarm8 AC Mains Bistable Switch9 Gas Leakage Alarm10 Transistorised Code Lock With Torch11 Call Bell with Welcome Indication12 Dew-Point Sensor13 Cash Box Guard14 Automatic Sprinkler Control System15 Guitar Effect Pedal Power16 Infrared Illuminator17 Smart Laptop Docking Station18 Flasher For Deepawali19 Electronic Metronome20 Mobile Car Stereo Player21 Motion Sensor for Security Light22 Electric Guitar Preamplifier23 Bipolar Transistor Tester24 Mobile Electronic Workbench25 Digital Thermometer26 Weekly Reminder27 Electronic Dice Using AT89C205128 Digital Timer Enhancement29 Water-Level Indicator Using 7-segment Display30 Automatic Light Controller Using 780631 Spy Ear32 Antisleep Alarm for Students33 Four-Stage FM Transmitter34 Numeric Water-level Indicator35 Versatile Probe36 Electronic Candles37 Simple Sensitive Remote Control Tester38 Pyroelectric Fire Alarm39 Telephone Call Recorder40 DuoPhone41 Mini UPS System42 Car-Reversing Horn With Flasher43 Short-Circuit Protection in DC Low-Voltage Systems44 Inverter for Soldering Iron

ESYS INDIA INSTITUTE ELECTRONICS TRAINING CENTRE

45 Transistorised Logic Probe for TTL46 Constant-Current Battery Charger47 Multitone Siren48 Generator Room Light49 Liquid Level Alarm50 PC Power Manager51 Skin Response Meter52 Solar Panel based Charger and Small LED Lamp53 Electronic Bicycle Lock54 Remote-operated Master Switch55 USB Power Socket56 Triple Power Supply57 Smart Hearing Aid58 Midnight Security Light59 Automated Alarm Circuits60 Traffic Baton61 Laser-guided Door Opener62 Battery-level Indicator63 Traffic Controller64 Night Alert65 Muscular Stimulator66 Wireless Switch67 Electric Window Fence Charger68 Three-Phase Appliance Protector69 Aquarium Probe70 Bicycle Indicator71 Poor Man’s Hearing Aid72 Portable Lamp Flasher73 Car Anti-theft Guard74 USB Power Booster75 Smart Vibration Sensor76 Drinking Water alarm77 Glow Plug Controller78 Tester For Remote Control79 Automatic Low-Power Emergency Light80 Mobile Bug81 LED Lighting for Christmas82 Current Sensor83 Seismic Sensor84 Dice With 7-Segment Display85 Motorbike Alarm86 Laptop Protector87 Shutter Guard88 Desktop Power Supply89 PC Temperature Alarm

ESYS INDIA INSTITUTE ELECTRONICS TRAINING CENTRE

90 Mobile Shield91 Infrared Firecracker Igniter92 Automatic Phase Changer93 Flying Saucer94 Anti-Collision Rear Light95 Light Fence96 MAT Switch97 5-Band Graphic Equaliser98 Clock Timer99 Fully Automatic Emergency Light100 IR Music Transmitter and Receiver101 Electronic Horn102 Darkroom Timer103 Water level indicator With Alarm104 PC Multimedia Speakers105 Precision Amplifier with Digital Control106 Security System Switcher107 Digital Speedometer108 House Security System109 Long Range IR Transmitter110 Telephone Conversation Recorder111 Automatic Dual Output Display112 Digital Dice With Numeric Display113 2-Line Intercom-Cum-Telephone Line Changeover Circuit114 Magic Light115 Teleremote Control116 Programmable LED Indicator117 Touch Sensitive Musical Bell With Timer118 Staircase Light With Auto Switch-Off119 Tiny Dew Sensor120 Computerised Morse Code Generator Transmitter121 Telecom Headset122 Telephone Ringer Using Timer ICs123 Power Supply Failure Alarm124 Protection for Your Electrical Appliance125 Simple Code Lock126 PC-based 7 Segment Rolling Display127 Automatic Room Power Control128 Fuild Level Detector129 Accurate Electronic Stop Watch130 Sensitive Temperature Switch131 Ramp Controlled Light132 7MHz CW AM QRP Transmitter133 Auto Reset Over-Under Voltage Cut-Out134 Shortwave Transmitter

ESYS INDIA INSTITUTE ELECTRONICS TRAINING CENTRE

135 Programmable Door-Bell with Flashing LEDS136 Precision Attenuater with Digital Control137 Parallel Telephone With Secrecy138 Telephone Call Meter Using Calculator and COB139 Magnetic Proximity Switch140 Electronic Scoring Game141 Electronic Card-Lock System142 Blown Fuse Indicator143 Simple Intercom Circuit144 LED-Based Message Display145 Telephone Receiver146 Water-LeveL Controller147 Song Number Display148 Fastest-finger-first-indicator149 Musical 'Touch' Bell150 Audio-Visual Extra Ringer For Phone151 Contactless AC Mains Voltage Detector152 Fire Alarm153 Precison 1Hz Clock Generator Using Chip-On-Board154 Short Wave AM Transmitter155 Solidstate Auto Power off on Mains Failure156 Automatic Emergency Torch157 Automatic Emergency Light158 Versatile CMOS TTL Logic and Clock Probe159 A Hierarchical Priority Encoder160 Digital Mains Voltage Indicator161 Low Cost PCO Billing Meter162 Automatic Speed Controller For Fans and Coolers163 Telephone Line Based Audio Muting164 Precision Digial AC Power Controller165 Phone BroadCaster166 Long-range FM Transmitter167 Self Switch Power Supply168 Electrical Equipment Control Using PC169 Low Cost Transistorised Intercom170 Cordless Phone Backup171 Sleep Switch Cum Wake Timer172 Simple Analogue To Digital Converter173 Digital Switching System174 Ultra Low Drop Linear Regulator175 40-Meter Direct Conversion Receiver176 Frequency Measurement Using PC177 Miniature Strobe Light178 CD-Rom Drive as Digital-Audio CD Player179 Clap Remote

ESYS INDIA INSTITUTE ELECTRONICS TRAINING CENTRE

180 Smart Phone Light181 Handy Zener Diode Tester182 Telephone Line Vigilant183 High & Low Voltage Cutout184 Color Sensor185 Running Message Display186 Low Current High Voltage Power Supply187 Intelligent Switch188 Automatic Temperature Controlled Fan189 Watch Dog for Telephones190 UPS for Cordless Telephones191 Economical Pump Controller192 Clap Switch193 Ultrasonic Proximity Detector194 Secret Bell195 Variable Power Supply Using a Fixed-Voltage Regulator IC196 Appliance Timer-Cum-Clap Switch197 Telephone-Operated Calling System198 Front Door Guard199 Bell-Cum Light Controller200 Friendly Charger for Mobile Phones201 Hearing Aid202 Speed Control of DC Motor Using Pulse-Width Modulation203 Remote-Controlled Fan Regulator204 Low-Power Voltage Doubler205 Parrot-Sounding AC Doorbell206 Multi-Melody Generator With Instrumental Effect207 School-College Quiz Buzzer208 Visual AC Mains Voltage Indicator209 Simple Short-Wave Transmitter210 Solar Lighting System211 Infrared Bug212 Picnic Lamp213 Versatile Power Supply214 Shadow Alarm215 IR Burglar Deterrent216 Versatile Water-Level Controller217 Automatic-Off Timer For CD Players218 Heat-Sensitive Switch219 Sensitive Vibration Detector220 Digital Dice221 Remote-Controlled Power-Off Switch222 Little Door Guard223 Stress Meter224 Medium-Power FM Transmitter

ESYS INDIA INSTITUTE ELECTRONICS TRAINING CENTRE

225 Teleconferencing System226 Smart Cellphone Holder227 Fuel Reserve Indicator For Vehicles228 Brake Failure Indicator229 Safety Guard230 Mains Supply Failure Alarm231 Remote Control For Home Appliances232 Micromotor Controller233 Solar Bug234 Simple Digital Security System235 Digital Audio - Video Input Selector236 Auto Turn-Off Battery Charger237 Atmel AVR ISP Dongle238 Audio Amplifier for Personal Stereo239 Musical Light Chaser240 Hit Switch241 Water-Level Controller242 Fire Alarm Using Thermistor243 Electronic Watchdog244 Automatic School Bell245 Anti-Theft Alarm For Bikes246 DC Motor Control Using A Single Switch247 Solidstate Remote Control Switch248 Flashing-Cum-Running Light249 Quality FM Transmitter250 Stabilised Power Supply With Short-Circuit Indication251 Digital Stop Watch252 Cell-Phone-Controlled Audio Video Mute Switch253 PC-Based DC Motor Speed Controller254 Under-Over-Voltage Beep for Manual Stabiliser255 Child's Lamp256 Watchman Watcher257 Highway Alert Signal Lamp258 Low-Cost Electronic Quiz Table259 Mobile Cellphone Charger260 Smart Foot Switch261 Programmable Timer for Appliances262 Anti-Bag-Snatching Alarm263 Multiband CW Transmitter264 Automatic Night Lamp With Morning Alarm265 Touch Dimmer266 Mosfet-Based Preamplifier for FM Radio DXing267 Non-Contact Power Monitor268 Remote-Operated Musical Bell269 Electronic Motor Starter

ESYS INDIA INSTITUTE ELECTRONICS TRAINING CENTRE

270 Washing Machine Motor Controller271 Over-Under-Voltage Protection of Electrical Appliances272 Low-Cost Hearing Aid273 Voltage-Based Controller For Switches274 DTMF Receiver IC MT8870 Tester275 Pulse Generator276 Infrared Remote Control Timer277 Multi-Switch Doorbell With Indicators278 Electronic Security System279 Lead-Acid Battery Charger With Voltage Analyser280 Ultra-Bright LED Lamp281 Three-Colour Display Using Bicolour LEDs282 Computerised Universal Timer283 Number Guessing Game284 Intruder Radio Alert System285 Flashing Beacon286 Knock Alarm287 Automated Traffic Signal Controller288 Infrared Toy Car Motor Controller289 Mains Manager290 Crystal-Controlled Time-Base Generator291 Mains Operated Christmas Star292 Music On-Hold For Telephones293 Solidstate Switch For DC-Operated Gadgets294 Ding-Dong Bell295 IR Remote Switch296 FM Booster297 Laser Torch-Based Voice Transmitter And Receiver298 Mobile Phone Battery Charger299 Condenser Mic Audio Amplifier300 Speller Effect Sign Display301 Stereo Tape Head Preamplifier For PC Sound Card302 Invisible Broken Wire Detector303 Simple Telephone Ring Tone Generator304 Anti-Theft Security For Car Audios305 DTMF Proximity Detector306 Versatile Zener Diode Tester307 15-Step Digital Power Supply308 Auto Shut-off For Cassette Players And Amplifiers309 Generation Of 1-Sec. Pulses Spaced 5-Sec. Apart310 9-Line Telephone Sharer311 Automatic Heat Detector312 Single Phase Electronic Starter313 Infrared Electronic Shooting Game314 Add-On Stereo Channel Selector

ESYS INDIA INSTITUTE ELECTRONICS TRAINING CENTRE

315 Telephone Number Display316 Luggage Security System317 Universal High-Resistance Voltmeter318 Time Switch319 Charge Monitor For 12V Rechargeable Lead-Acid Battery320 Dual-Channel Digital Volume Control321 Infrared Cordless Headphone322 Simple Low-Cost Digital Code Lock323 Electronic Jam324 Wiper Speed Controller325 IC Controlled Emergency Light With Charger326 Colour Sensor327 FM Transmitter For Channel Changer328 Tank Overflow Preventer329 33-Volt Tunning Voltage330 Appliance Timer331 Electronic Code Lock332 Flashing Brakelight333 IR Remote Control334 Car Anti-Theft Wireless Alarm335 Soft Musical Telephone Ringer336 Low Cost Transistorised Inverter337 Automatic Telephone Answering Machine338 Hourly Chime Function Generator339 Divide-By-N Counter Realisation Using ICs CD4033 And CD4017340 Programmable Priority Time Switch341 Digital Volume Control342 Extension Phone Switcher343 Battery Opeated High Voltage Source344 Handy Telephone Receiver345 A Highly Efficient DC Lamp Dimmer346 Low Cost Automatic Gate LIght With A Musical Bell347 Automatic Switch For Audio Power Amplifier348 Capacitance Bridge349 Darkness Controlled Light Switch350 AF/RF Signal Tracer

ESYS INDIA INSTITUTE ELECTRONICS TRAINING CENTRE