Electronic Projects with circuits from EFY - List 4

S No.	Circuit Name	Hits
1	PC-Based Oscilloscope	195440
2	Infrared Toy Car Motor Controller	163998
3	Long-Range FM Transmitter	160660
4	Electronic Security System	86909
5	House Security System	85652
6	FM Booster	80046
7	IR Remote Switch	79242
8	Clap Switch	71148
9	Electrical Equipment Control Using PC	64474
10	Water-Level Controller	63694
11	Laser Torch-Based Voice Transmitter And Receiver	62944
12	LED-Based Message Display	62604
13	Automated Traffic Signal Controller	60009
14	Telephone Receiver	59699
15	Ultra-Bright LED Lamp	59017
16	Invisible Broken Wire Detector	57907
17	Quality FM Transmitter	57738
18	Ding-Dong Bell	55076
19	Infrared Cordless Headphone	55017
20	DTMF Proximity Detector	54296
21	9-Line Telephone Sharer	53885
22	Remote Control For Home Appliances	53660
23	Condenser Mic Audio Amplifier	53054
24	Knock Alarm	52675
25	Mobile Phone Battery Charger	52218
26	15-Step Digital Power Supply	51963
27	Telephone Number Display	51300
28	Mobile Cellphone Charger	50895
29	Lead-Acid Battery Charger With Voltage Analyser	49567
30	DTMF Receiver IC MT8870 Tester	47740
31	Water-Level Controller	47413
32	Automatic Night Lamp With Morning Alarm	47306
33	Musical ‘Touch’ Bell	46115
34	Charge Monitor For 12V Rechargeable Lead-Acid Battery	45199
35	PC-Based DC Motor Speed Controller	44711
36	Infrared Remote Control Timer	44195
37	Intruder Radio Alert System	42719
38	Cell-Phone-Controlled Audio/Video Mute Switch	42702
39	Touch Dimmer	42506
40	Programmable Timer for Appliances	42356
41	Automatic Heat Detector	42307
42	Three-Colour Display Using Bicolour LEDs	41273
43	Electronic Motor Starter	41154
44	Electronic Card-Lock System	40657
45	Fastest Finger First Indicator	39745
46	Electronic Watchdog	39378
47	Remote-Operated Musical Bell	38741
48	Anti-Theft Security For Car Audios	38417
49	Flashing Beacon	38256
50	Simple Code Lock	38229
51	Shortwave Transmitter	38208
52	Washing Machine Motor Controller	38122
53	Teleremote Control	38115
54	Simple Telephone Ring Tone Generator	38020
55	Anti-Theft Alarm For Bikes	37748
56	Automatic Speed-Controller For Fans and Coolers	37343
57	Pulse Generator	37288
58	Parallel Telephone With Secrecy and Call Prevention	36135
59	Digital Mains Voltage Indicator	36101
60	Digital Stop Watch	35312
61	Electronic Jam	35240
62	Low-Cost Hearing Aid	35183
63	Power-Supply Failure Alarm	34763
64	Computerised Universal Timer	34224
65	Child's Lamp	33812
66	Song Number Display	33729
67	Audio Amplifier for Personal Stereo	33587
68	Auto Turn-Off Battery Charger	33026
69	Music On-Hold For Telephones	32959
70	CD-ROM Drive As Digital-Audio CD-Player	32606
71	Precision Amplifier With Digital Control	32516
72	Simple Digital Security System	32472
73	Over-/Under-Voltage Protection of Electrical Appliances	32459
74	Stereo Tape Head Preamplifier For PC Sound Card	32376
75	IC Controlled Emergency Light With Charger	32339
76	Luggage Security System	32326
77	DarkRoom Timer	31952
78	Remote-Controlled Power-Off Switch	31894
79	Simple Low-Cost Digital Code Lock	31606
80	Solar Lighting System	31158
81	Telephone Conversation Recorder	31041
82	Mains Manager	30654
83	DC Motor Control Using A Single Switch	30328
84	Hit Switch	30161
85	Remote-Controlled Fan Regulator	29921
86	Low-Cost PCO Billing Meter	29808
87	Versatile Zener Diode Tester	29770
88	Watchman Watcher	29471
89	Number Guessing Game	29288
90	Mosfet-Based Preamplifier for FM Radio DXing	28873
91	Solidstate Remote Control Switch	28656
92	Solar Bug	28643
93	Medium-Power FM Transmitter	28584
94	Fire Alarm Using Thermistor	28390
95	Musical Light Chaser	28295
96	2-Line Intercom-Cum-Telephone Line Changeover Circuit	28174
97	Water Level Indicator With Alarm	27348
98	Speller Effect Sign Display	27131
99	Micromotor Controller	26797
100	Smart Foot Switch	26765
101	Low-Cost Transistorised Intercom	26625
102	Telephone Ringer Using Timer ICs	26440
103	Mains Operated Christmas Star	26233
104	Automatic School Bell	26087
105	Parallel Telephones With Secrecy	25971
106	Teleconferencing System	25963
107	Precision Digital AC Power Controller	25872
108	Multiband CW Transmitter	25838
109	Flashing-Cum-Running Light	25789
110	Simple Analogue To Digital Converter	25734
111	Dual-Channel Digital Volume Control	25695
112	Stabilised Power Supply With Short-Circuit Indication	25172
113	Multi-Switch Doorbell With Indicators	25033
114	Phone BroadCaster	25014
115	Shadow Alarm	24889
116	Time Switch	24843
117	Solidstate Switch For DC-Operated Gadgets	24369
118	Auto Shut-off For Cassette Players And Amplifiers	24369
119	Little Door Guard	24160
120	Crystal-Controlled Time-Base Generator	24023
121	Under-/Over-Voltage Beep for Manual Stabiliser	23705
122	Telephone Call Meter Using Calculator And COB	23630
123	Smart Cellphone Holder	23548
124	Blown Fuse Indicator	23360
125	Ultrasonic Proximity Detector	23347
126	Highway Alert Signal Lamp	23296
127	Anti-Bag-Snatching Alarm	23211
128	Atmel AVR ISP Dongle	23182
129	Brake Failure Indicator	23144
130	Cordless Phone Backup	22995
131	Self-Switching Power Supply	22839
132	Non-Contact Power Monitor	22806
133	Single Phase Electronic Starter	22738
134	Protection For Your Electrical Appliances	22304
135	Versatile Water-Level Controller	21951
136	Frequency Measurements Using PC	21900
137	Low-Cost Electronic Quiz Table	21385
138	Fuel Reserve Indicator For Vehicles	21283
139	Digital Switching System	21225
140	Stress Meter	21178
141	Voltage-Based Controller For Switches	20863
142	Infrared Bug	20780
143	A Hierarchical Priority Encoder	20019
144	Digital Audio/Video Input Selector	19934
145	Add-On Stereo Channel Selector	19892
146	Digital Dice	19593
147	PC-Based 7-Segment Rolling Display	19553
148	Precision Attenuator With Digital Control	19498
149	Magnetic Proximity Switch	19439
150	40-Metre Direct Conversion Receiver	19405
151	Versatile Power Supply	19146
152	IR Music Transmitter and Receiver	19005
153	Telephone Line Based Audio Muting And Light-On Circuit	18737
154	Mains Supply Failure Alarm	18699
155	IR Burglar Deterrent	18685
156	Variable Power Supply Using a Fixed-Voltage Regulator IC	18612
157	Generation Of 1-Sec. Pulses Spaced 5-Sec. Apart	18458
158	Digital Speedometer	18201
159	Sleep-Switch Cum Wake-up Timer	18106
160	Clap Remote	18035
161	Sensitive Vibration Detector	17937
162	Safety Guard	17825
163	Heat-Sensitive Switch	17803
164	Picnic Lamp	17535
165	Universal High-Resistance Voltmeter	17468
166	Miniature Strobe Light	17295
167	Speed Control of DC Motor Using Pulse-Width Modulation	17268
168	Colour Sensor	17037
169	Friendly Charger for Mobile Phones	16647
170	Secret Bell	16187
171	Automatic Emergency Light	15998
172	Automatic-Off Timer For CD Players	15658
173	Fully Automatic Emergency Light	15427
174	IR Remote Control	15356
175	Wiper Speed Controller	15342
176	Tiny Dew Sensor	15333
177	Front Door Guard	15208
178	Running Message Display	15000
179	Electronic Scoring Game	14653
180	Magic Lights	14537
181	Telephone-Operated Calling System	14491
182	Ultrasonic Proximity Detector	13527
183	Hearing Aid	13342
184	Automatic Room Power Control	13087
185	School/College Quiz Buzzer	12949
186	Car Anti-Theft Wireless Alarm	12606
187	Simple Short-Wave Transmitter	12556
188	FM Transmitter For Channel Changer	12454
189	Clock Timer	12436
190	Electronic Code Lock	12304
191	Intelligent Switch	12186
192	Digital Volume Control	12096
193	Contactless AC Mains Voltage Detector	12038
194	Automatic Dual-Output Display	11951
195	Parrot-Sounding AC Doorbell	11832
196	Fire Alarm	11727
197	Simple Sensitive Remote Control Tester	11707
198	UPS For Cordless Telephones	11613
199	Electronic Horn	11499
200	Precision 1Hz Clock Generator Using Chip-On-Board	11478
201	Visual AC Mains Voltage Indicator	11193
202	Low-Power Voltage Doubler	11161
203	Smart Phone Light	11042
204	Automatic Temperature Controlled Fan	10660
205	Low Cost Transistorised Inverter	10535
206	AF/RF Signal Tracer	10506
207	Telecom Headset	10506
208	Darkness Controlled Light Switch	10291
209	Bell-Cum Light Controller	10225
210	Ultra Low Drop Linear Regulator	10183
211	Automatic Temperature Controller	9966
212	Simple Intercom Circuit	9844
213	Automatic Telephone Answering Machine	9720
214	Fluid Level Detector	9468
215	Appliance Timer-Cum-Clap Switch	9428
216	Clap Switch	8872
217	Multi-Melody Generator With Instrumental Effect	8790
218	Mobile Shield	8453
219	Short Wave AM Transmitter	8404
220	Flying Saucer	8391
221	Programmable LED Indicator	8195
222	Tank Overflow Preventer	8016
223	Telephone Call Counter	7978
224	Running Lights Effect	7957
225	Infrared Electronic Shooting Game	7945
226	Handy Telephone Receiver	7917
227	Light Fence	7869
228	Low Current, High Voltage Power Supply	7781
229	Telephone Line Vigilant	7705
230	Battery Opeated High Voltage Source	7694
231	Anti-Collision Rear Light	7653
232	Sensitive Temperature Switch	7520
233	Automatic Emergency Torch	7390
234	Watch-Dog for Telephones	7135
235	7MHz CW/AM QRP Transmitter	7120
236	Handy Zener Diode Tester	7109
237	Digital Dice With Numeric Display	6935
238	Automatic Phase Changer	6927
239	Capacitance Bridge	6922
240	Programmable Door-Bell With Flashing LEDs	6885
241	Auto Reset Over/Under Voltage Cut-Out	6823
242	Four-In-One Burglar Alarm	6818
243	Automatic Switch For Audio Power Amplifier	6752
244	Low Cost Automatic Gate LIght With A Musical Bell	6715
245	Economical Pump Controller	6699
246	Appliance Timer	6693
247	Water Level Controller Using 3-Phase Starter	6691
248	MAT Switch	6664
249	Dancing Lights	6605
250	Divide-By-N Counter Realisation Using ICs CD4033 And CD4017	6467
251	Ultrasonic Switch	6345
252	Telephone Amplifier	6288
253	Flashing Brakelight	6214
254	5-Band Graphic Equaliser	6198
255	Ready -To-Use Object Counter	6071
256	A Highly Efficient DC Lamp Dimmer	6030
257	Infrared Firecracker Igniter	5962
258	High and Low Voltage Cutout With Delay and Melody	5845
259	Programmable Priority Time Switch	5844
260	33-Volt Tunning Voltage	5771
261	Computerised Morse Code Generator/Transmitter	5704
262	Accurate Electronic Stop-Watch	5607
263	Simple Logic Probe	5443
264	Solidstate Relay with Under/Over Voltage Protection	5400
265	Solidstate Auto Power-Off/On Mains Failure	5221
266	Laptop Protector	5093
267	Touch-Sensitive Musical Bell With Timer	5065
268	Desktop Power Supply	5040
269	Ramp Controlled Light	5002
270	Hourly Chime Function Generator	4734
271	Soft Musical Telephone Ringer	4714
272	Programmable Musical Bell	4703
273	Extension Phone Switcher	4694
274	Adjustable Dancing Lights	4640
275	Audio-Visual Extra Ringer For Phone	4573
276	Motorbike Alarm	4446
277	Programmable 8-Digit Code Lock	4004
278	Powerful AM Radio Transmitter	3485
279	Shutter Guard	3439
280	Low Cost Electronic Clock	3219
281	PC Based Digital Clock	3119
282	Seismic Sensor	3022
283	Off-Line Telephone Tester	2956
284	A Low Distortion Audio Pre-amplifier	2383
285	LED Lighting for Christmas	2358
286	Versatile Variable Duration Digital Timer	2144
287	Current Sensor	2117
288	Tacho for Microprocessor Based Drives	2116
289	Add Auto Start To Generators	1908
290	Dice With 7-Segment Display	1879
291	Sound Controlled Flip-Flop	1716
292	Fancy Christmas Light	1202