Electronics

Electronics Circuit Idea

ciruuit ideas
Sr. No Circuit Idea
1 Home Appliance Control Using TV Remote
2 CCFL Tester for LCD Screens
3 Laser Communication System
4 Remote Control for Toy Car
5 Wireless Extender for IR Remote Controls
6 Telephone Line In-Use Indicator
7 Laser-based Intruder Alarm
8 AC Mains Bistable Switch
9 Gas Leakage Alarm
10 Transistorised Code Lock With Torch
11 Call Bell with Welcome Indication
12 Dew-Point Sensor
13 Cash Box Guard
14 Automatic Sprinkler Control System
15 Guitar Effect Pedal Power
16 Infrared Illuminator
17 Smart Laptop Docking Station
18 Flasher For Deepawali
19 Electronic Metronome
20 Mobile Car Stereo Player
21 Motion Sensor for Security Light
22 Electric Guitar Preamplifier
23 Bipolar Transistor Tester
24 Mobile Electronic Workbench
25 Digital Thermometer
26 Weekly Reminder
27 Electronic Dice Using AT89C2051
28 Digital Timer Enhancement
29 Water-Level Indicator Using 7-segment Display
30 Automatic Light Controller Using 7806
31 Spy Ear
32 Antisleep Alarm for Students
33 Four-Stage FM Transmitter
34 Numeric Water-level Indicator
35 Versatile Probe
36 Electronic Candles
37 Simple Sensitive Remote Control Tester
38 Pyroelectric Fire Alarm
39 Telephone Call Recorder
40 DuoPhone
41 Mini UPS System
42 Car-Reversing Horn With Flasher
43 Short-Circuit Protection in DC Low-Voltage Systems
44 Inverter for Soldering Iron
45 Transistorised Logic Probe for TTL
46 Constant-Current Battery Charger
47 Multitone Siren
48 Generator Room Light
49 Liquid Level Alarm
50 PC Power Manager
51 Skin Response Meter
52 Solar Panel based Charger and Small LED Lamp
53 Electronic Bicycle Lock
54 Remote-operated Master Switch
55 USB Power Socket
56 Triple Power Supply
57 Smart Hearing Aid
58 Midnight Security Light
59 Automated Alarm Circuits
60 Traffic Baton
61 Laser-guided Door Opener
62 Battery-level Indicator
63 Traffic Controller
64 Night Alert
65 Muscular Stimulator
66 Wireless Switch
67 Electric Window Fence Charger
68 Three-Phase Appliance Protector
69 Aquarium Probe
70 Bicycle Indicator
71 Poor Man’s Hearing Aid
72 Portable Lamp Flasher
73 Car Anti-theft Guard
74 USB Power Booster
75 Smart Vibration Sensor
76 Drinking Water alarm
77 Glow Plug Controller
78 Tester For Remote Control
79 Automatic Low-Power Emergency Light
80 Mobile Bug
81 LED Lighting for Christmas
82 Current Sensor
83 Seismic Sensor
84 Dice With 7-Segment Display
85 Motorbike Alarm
86 Laptop Protector
87 Shutter Guard
88 Desktop Power Supply
89 PC Temperature Alarm
90 Mobile Shield
91 Infrared Firecracker Igniter
92 Automatic Phase Changer
93 Flying Saucer
94 Anti-Collision Rear Light
95 Light Fence
96 MAT Switch
97 5-Band Graphic Equaliser
98 Clock Timer
99 Fully Automatic Emergency Light
100 IR Music Transmitter and Receiver
101 Electronic Horn
102 Darkroom Timer
103 Water level indicator With Alarm
104 PC Multimedia Speakers
105 Precision Amplifier with Digital Control
106 Security System Switcher
107 Digital Speedometer
108 House Security System
109 Long Range IR Transmitter
110 Telephone Conversation Recorder
111 Automatic Dual Output Display
112 Digital Dice With Numeric Display
113 2-Line Intercom-Cum-Telephone Line Changeover Circuit
114 Magic Light
115 Teleremote Control
116 Programmable LED Indicator
117 Touch Sensitive Musical Bell With Timer
118 Staircase Light With Auto Switch-Off
119 Tiny Dew Sensor
120 Computerized Morse Code Generator Transmitter
121 Telecom Headset
122 Telephone Ringer Using Timer ICs
123 Power Supply Failure Alarm
124 Protection for Your Electrical Appliance
125 Simple Code Lock
126 PC-based 7 Segment Rolling Display
127 Automatic Room Power Control
128 Fuild Level Detector
129 Accurate Electronic Stop Watch
130 Sensitive Temperature Switch
131 Ramp Controlled Light
132 7MHz CW AM QRP Transmitter
133 Auto Reset Over-Under Voltage Cut-Out
134 Shortwave Transmitter
135 Programmable Door-Bell with Flashing LEDS
136 Precision Attenuate with Digital Control
137 Parallel Telephone With Secrecy
138 Telephone Call Meter Using Calculator and COB
139 Magnetic Proximity Switch
140 Electronic Scoring Game
141 Electronic Card-Lock System
142 Blown Fuse Indicator
143 Simple Intercom Circuit
144 LED-Based Message Display
145 Telephone Receiver
146 Water-LeveL Controller
147 Song Number Display
148 Fastest-finger-first-indicator
149 Musical ‘Touch’ Bell
150 Audio-Visual Extra Ringer For Phone
151 Contactless AC Mains Voltage Detector
152 Fire Alarm
153 Precision 1Hz Clock Generator Using Chip-On-Board
154 Short Wave AM Transmitter
155 Solid-state Auto Power off on Mains Failure
156 Automatic Emergency Torch
157 Automatic Emergency Light
158 Versatile CMOS TTL Logic and Clock Probe
159 A Hierarchical Priority Encoder
160 Digital Mains Voltage Indicator
161 Low Cost PCO Billing Meter
162 Automatic Speed Controller For Fans and Coolers
163 Telephone Line Based Audio Muting
164 Precision Digital AC Power Controller
165 Phone Broadcaster
166 Long-range FM Transmitter
167 Self Switch Power Supply
168 Electrical Equipment Control Using PC
169 Low Cost Transistorized Intercom
170 Cordless Phone Backup
171 Sleep Switch Cum Wake Timer
172 Simple Analogue To Digital Converter
173 Digital Switching System
174 Ultra Low Drop Linear Regulator
175 40-Meter Direct Conversion Receiver
176 Frequency Measurement Using PC
177 Miniature Strobe Light
178 CD-Rom Drive as Digital-Audio CD Player
179 Clap Remote
180 Smart Phone Light
181 Handy Zener Diode Tester
182 Telephone Line Vigilant
183 High & Low Voltage Cutout
184 Color Sensor
185 Running Message Display
186 Low Current High Voltage Power Supply
187 Intelligent Switch
188 Automatic Temperature Controlled Fan
189 Watch Dog for Telephones
190 UPS for Cordless Telephones
191 Economical Pump Controller
192 Clap Switch
193 Ultrasonic Proximity Detector
194 Secret Bell
195 Variable Power Supply Using a Fixed-Voltage Regulator IC
196 Appliance Timer-Cum-Clap Switch
197 Telephone-Operated Calling System
198 Front Door Guard
199 Bell-Cum Light Controller
200 Friendly Charger for Mobile Phones
201 Hearing Aid
202 Speed Control of DC Motor Using Pulse-Width Modulation
203 Remote-Controlled Fan Regulator
204 Low-Power Voltage Doubler
205 Parrot-Sounding AC Doorbell
206 Multi-Melody Generator With Instrumental Effect
207 School-College Quiz Buzzer
208 Visual AC Mains Voltage Indicator
209 Simple Short-Wave Transmitter
210 Solar Lighting System
211 Infrared Bug
212 Picnic Lamp
213 Versatile Power Supply
214 Shadow Alarm
215 IR Burglar Deterrent
216 Versatile Water-Level Controller
217 Automatic-Off Timer For CD Players
218 Heat-Sensitive Switch
219 Sensitive Vibration Detector
220 Digital Dice
221 Remote-Controlled Power-Off Switch
222 Little Door Guard
223 Stress Meter
224 Medium-Power FM Transmitter
225 Teleconferencing System
226 Smart Cellphone Holder
227 Fuel Reserve Indicator For Vehicles
228 Brake Failure Indicator
229 Safety Guard
230 Mains Supply Failure Alarm
231 Remote Control For Home Appliances
232 Micro motor Controller
233 Solar Bug
234 Simple Digital Security System
235 Digital Audio – Video Input Selector
236 Auto Turn-Off Battery Charger
237 Atmel AVR ISP Dongle
238 Audio Amplifier for Personal Stereo
239 Musical Light Chaser
240 Hit Switch
241 Water-Level Controller
242 Fire Alarm Using Thermistor
243 Electronic Watchdog
244 Automatic School Bell
245 Anti-Theft Alarm For Bikes
246 DC Motor Control Using A Single Switch
247 Solid-state Remote Control Switch
248 Flashing-Cum-Running Light
249 Quality FM Transmitter
250 Stabilized Power Supply With Short-Circuit Indication
251 Digital Stop Watch
252 Cell-Phone-Controlled Audio Video Mute Switch
253 PC-Based DC Motor Speed Controller
254 Under-Over-Voltage Beep for Manual Stabilizer
255 Child’s Lamp
256 Watchman Watcher
257 Highway Alert Signal Lamp
258 Low-Cost Electronic Quiz Table
259 Mobile Cell phone Charger
260 Smart Foot Switch
261 Programmable Timer for Appliances
262 Anti-Bag-Snatching Alarm
263 Multiband CW Transmitter
264 Automatic Night Lamp With Morning Alarm
265 Touch Dimmer
266 Mosfet-Based Preamplifier for FM Radio DXing
267 Non-Contact Power Monitor
268 Remote-Operated Musical Bell
269 Electronic Motor Starter
270 Washing Machine Motor Controller
271 Over-Under-Voltage Protection of Electrical Appliances
272 Low-Cost Hearing Aid
273 Voltage-Based Controller For Switches
274 DTMF Receiver IC MT8870 Tester
275 Pulse Generator
276 Infrared Remote Control Timer
277 Multi-Switch Doorbell With Indicators
278 Electronic Security System
279 Lead-Acid Battery Charger With Voltage Analyser
280 Ultra-Bright LED Lamp
281 Three-Colour Display Using Bicolour LEDs
282 Computerized Universal Timer
283 Number Guessing Game
284 Intruder Radio Alert System
285 Flashing Beacon
286 Knock Alarm
287 Automated Traffic Signal Controller
288 Infrared Toy Car Motor Controller
289 Mains Manager
290 Crystal-Controlled Time-Base Generator
291 Mains Operated Christmas Star
292 Music On-Hold For Telephones
293 Solid-state Switch For DC-Operated Gadgets
294 Ding-Dong Bell
295 IR Remote Switch
296 FM Booster
297 Laser Torch-Based Voice Transmitter And Receiver
298 Mobile Phone Battery Charger
299 Condenser Mic Audio Amplifier
300 Speller Effect Sign Display
301 Stereo Tape Head Preamplifier For PC Sound Card
302 Invisible Broken Wire Detector
303 Simple Telephone Ring Tone Generator
304 Anti-Theft Security For Car Audios
305 DTMF Proximity Detector
306 Versatile Zener Diode Tester
307 15-Step Digital Power Supply
308 Auto Shut-off For Cassette Players And Amplifiers
309 Generation Of 1-Sec. Pulses Spaced 5-Sec. Apart
310 9-Line Telephone Sharer
311 Automatic Heat Detector
312 Single Phase Electronic Starter
313 Infrared Electronic Shooting Game
314 Add-On Stereo Channel Selector
315 Telephone Number Display
316 Luggage Security System
317 Universal High-Resistance Voltmeter
318 Time Switch
319 Charge Monitor For 12V Rechargeable Lead-Acid Battery
320 Dual-Channel Digital Volume Control
321 Infrared Cordless Headphone
322 Simple Low-Cost Digital Code Lock
323 Electronic Jam
324 Wiper Speed Controller
325 IC Controlled Emergency Light With Charger
326 Colour Sensor
327 FM Transmitter For Channel Changer
328 Tank Overflow Preventer
329 33-Volt Tunning Voltage
330 Appliance Timer
331 Electronic Code Lock
332 Flashing Brake light
333 IR Remote Control
334 Car Anti-Theft Wireless Alarm
335 Soft Musical Telephone Ringer
336 Low Cost Transistorized Inverter
337 Automatic Telephone Answering Machine
338 Hourly Chime Function Generator
339 Divide-By-N Counter Realization Using ICs CD4033 And CD4017
340 Programmable Priority Time Switch
341 Digital Volume Control
342 Extension Phone Switcher
343 Battery Operated High Voltage Source
344 Handy Telephone Receiver
345 A Highly Efficient DC Lamp Dimmer
346 Low Cost Automatic Gate LIght With A Musical Bell
347 Automatic Switch For Audio Power Amplifier
348 Capacitance Bridge
349 Darkness Controlled Light Switch
350 AF/RF Signal Tracer

Leave a Reply

Your email address will not be published. Required fields are marked *