ELECTRONIC CIRCUIT HOBBY

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Audio Video circuit

Balanced microphone preamplifier

Audio Power Amplifier

100 Watt Single Chip Amplifier

Pre Amp Microphone

Stereo Noise Filter

Programmable Gain Amplifier

Class D Amplifier

Difference Amplifier

HeadphoneAmplifier

Cassette Recorder Circuit

8 Watt Audio Amp LM383

Signal Powered DynamicCompressor

Video Isolator

Loud Speaker On Delay

LA4440StereoAmplifier

 

Gadget

Scarecrow Animal Deterrent

Electronic Gong

Automatic Aquarium Feeder

Scan Mate

Polyphonic Door Bell

Simple1hz generator

On-Off ThermalControl

LED&LampFlasherMetronome

SimpleLightMeter

LightSensitiveVoltageDivider

LightActivatedRelay

AutomaticEmergencyLighting Unit

SuperSimpleTouchSwitch

LightControllerUsing PIC 16h873

Rat, Bat, Mosquito Repeller Result Exp

UltrasonicRangeMeterWithout uC

Digital Logic

Logic Probe With Pulse

LED Logic Flasher 

Decimal to BCD Encoder

Phase Detector

Johnson Counter

Ring Counter

 

Detector and Alarm

Touch Activated Alarm

Light Dark Sensor

MissingPulseDetector 555

MissingPulseDetector

ZeroCrossing Detector

SimpleOne-wireTouch Detector

FreezeDoorAlarm

DarkLightActivatedRelay

Electronics Compass

 

Power Supply

Computer ControlledPowerSupply

Adjustable1.2Vto37V1.5A Supply

A few Simple Power Supplies

Solar Cell Voltage Regulator

Battery Booster

QuickInfoDesignRegulator

12V Fan Directly on 230V

Mini Voltage Generator

12V to 9V Converter

12VLeadAcidMonitor

Car Battery Monitor

Electronics Fuse

Converter 220V-110V PS2

 

Oscillator

CMOS Squarewave generator

TTL Square wave generator

10Mhz Oscillator

 

GSM project

GSM SIM CARD Cloning

Universal GSM/CDMAdataCable

Transceiver

Medium-Power FM Transmitter

Quality FM Transmitter

4 Watt FM Transmitter complete

Infrared Receiver

Infra Red Transmitter

Giga Hertz Signal Detector

CellPhoneDetector

 

Electronics Tutorial

Unijunction Transistor

Bels Decibel dan dB

Resistor

Is high/Current get shock?

 

Charger

12-V NICAD Battery Charger

Fast Charger for NICAD Batteries

NICAD Charger

SuperSimpleNiCd/NiMH Charger

Dual Mode Charger

3AmpereBatteryCharger

 

Microcontroller

24CxxEEPROM Programmer

SPI Flash Programmer

USB to Serial Converter

USB AVR and AT89S5x Programmer

 

LAN Network

Null Modem Cable

USB to RS 232 cable

RJ45 Network Cable Tester

 

Inverter-Power

Home Made AC

Very Simple DC to AC converter

New DC to AC Converter

VoltageMultiplierCircuit

TripleVoltage

QuadruplerVoltage

8 watt Fluorescent Lamp Inverter

DC to AC Inverter With Mosfet 

Other Circuit

Voltage Mirror

741 Light-Dark Sensor

60 Hz,10Hz,1Hz Time Base 

Micro Spy with FETs

TTL Micro-Spy 

Building a Soldering Iron

Important Things about Battery

PWM Motor Control

High Stability Crystal Time Base

Auto Trigger Level Control

Single-transistor timing circuit 

Discrete PWM Generator

Integrator

MMC unlock Clip

Lighting Effect Generator

VoltageToCurrentConverter

CurrentToVoltageConverter

CurrentSensor

Remote Fan Control

 

More circuit

Delay Timer

Clapp Oscillator

Mains on Delay Circuit

Pressure Pad-Step On It

Simple Siren

Inductance Calculations

Electronics stethoscope

Universal Ding Dong

10Vto12V LED Bargraph

Green USB Switch

Smooth Flasher

Bell Alarm

Breadboard Project Protector

LEDLighting For Your CAR

BallastForEnergy-Saving Lamps

White Noise Generator

Put That Light Out

Store It Quickly !

 

DC to AC converter I

Simple DC to AC converter

DC to AC converter II

More DC to AC converter

PWM for Hydrogen generator

For optimized at low voltage to produce hydrogen

Post-box Monitor

Has the postman been yet?

Fog Lamp Sensor

For several years now, a rear fog lamp has been mandatory for trailers

Gas Flow Meter

Monitoring gas flow

Portable Thermometer

It’s usually is a good idea to check the temperature before setting off for an outdoor activity

Multitasking Pins

It’s entirely logical that low-cost miniature microcontrollers have fewer ‘legs’ than their bigger brothers

Mosquito Repeller

With the return of the fine weather, you’ll doubtless be enjoying lazing around of an evening on your patio

Wireless Audio Transmitter

Sitting peacefully under a tree at the bottom of your garden you may feel like listening to your favourite music from your hifi

LED Tester 

This simple LED tester consists of a current source

 with a potentiometer

 

 

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