Electronic Projects 2

ELECTRONIC PROJECTS

2

2 in 1 Door Bell

2-1 Quiz Buzzer

4

4 Player Quiz Buzzer

5

555 Timer As Amplifier

555 Timer IC Tester

9

9-Way Clap Switch

90 Second Timer

A

Active high trigger for 555 in monostable mode	Audio Amplifier using Opam	Automatic night lamp
Astable mode by NAND gate	Automatic light/dark indicator	Automatic OFF timer for CD player
Audio amplifier

B

Bathroom Light Off Timer

Bi Color LED

C

CD 4013 Based Two Way Switch	CD 4060IC based Message Display Circuit	Color distinguished using LDR/Color sensor using LDR
CD 4013 based Voice Sensing Module	CD4001 IC based Lighting System	Conversion of NAND gate to Basic gates
CD 4027 Based Emergency Lighting System	CD4049 Based LED torch	Conversion of NOR gate to Basic gates
CD 4060 Based Security Alarm	Coin Toss/Flip Simulator Circuit

D

Darkness detector

Differential amplifier

DTMF Decoder

E

Electronic alarm for cash box, lockers	Electronic Dice Circuit	Electronic Timer Circuit
Electronic Code Lock Circuit	Electronic Letter Box

F

Fire alarm	Flip Flop based Staircase Switch	Full range centigrade temperature sensor
Fixed voltage power supply

G

Generating time delay with 555 IC

H

H-bridge using transistor

High pass filter

I

IC 555 Based Message Display Circuit	Intruder alarm/ security system	Inverting amplifier using 741
IC555 based Multicolor LED Lamp	Inverting amplifier	Inverting amplifier with signal feedback
Infrared (IR) sensor

L

Lamp Using CA3140 IC	Light detector	Long range IR
Led Flasher Circuit	Light sensor using photodiode	Low pass filter
Light dependent frequency variation using LDR	Liquid level Alarm	Luggage Security Alarm

M

Magic Eye Circuit Using 4049 IC	Multi-Utility Flashing Light	Music (Data) transfer by IR
Metronome	Multipurpose Timer With Musical Alarm	Music (Data) transfer by IR by amplification
Multi Color Lighting

N

NAND Gate as SR Flip Flop	Negative supply using 555 IC	Non inverting amplifier
NAND gate monostable	Night Lamp using 555	NOR Gate as SR Flip Flop
NE 555 Timer based Automatic Headlight	Night Lamp with Timer for Stairs	NOT gate monostable

O

Opamp as comparator

Overheat/Overcooling circuit breaker

P

Periodically Turning On & Off Mosquito Repellent	Piezo sensor as output	Power failure alarm
Piezo sensor as input	Polarity cum continuity tester	Pre Set Off Timer

R

Refrigerator Door Alarm	Relay control through mic	RF based Intruder Alarm
Relay activation using TSOP 1738	Relay operation using Darlington Pair	RF based Wireless Remote Control
Relay control by sound	RF based Fire Alarm (Overheat Alarm)

S

Secure room access system	Simple AC to DC converter using bridge rectifier	Sound Operated LED
Security Alarm for Doors, Almirah, cupboards using Opam	Single switch motor on/off.. Clockwise/anticlockwise	Sound Operated Switch
Seismic sensor	Sound generation in audio range	Suitcase Alarm
Shadow Alarm using LDR	Sound Generation using 555

T

Timer Circuit using IC CD 4060	Touch switch	Transistor as audio amplifier
Toggle flip flop using CD4013	Touch Switch using 555 Timer	Transistor Based Secret Bell
Tone generator	Traffic light signal	Transistor Tester

U

UM3561 IC Based Security Alarm	Understanding NOR Gate (CD4001)	USB Mobile Charger
Understanding JK flip flop using CD4027

V

Variable power supply	Vehicle Indicator	Voltage Doubler Circuit Using IC 4049
Variable power supply and charger with emergency light	Vehicle Indicator Circuit	Voltage Doubler Circuit Using IC555
Variable Power Supply From Fixed Voltage Regulator	Voltage boost by using a resistor with 78XX

W

Water level controller cum indicator	Water Tank Overflow Alarm	Wireless Switch
Water level indicator with display	Wireless motor control through RF	Working of light dependent resistor
Water Sensor Circuit

Source: http://www.engineersgarage.com/