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Free online library on electronics Free library:
Encyclopedia of electronics and electrical engineering
Books and magazines
Schematic diagrams and service manuals
Reference books
News of science and technology

Free online library on electronics Free encyclopedia of electronics and electrical engineering:
Alternative energy sources
Assemblies of amateur radio equipment
Audio equipment
Audio-fidelity and speaker volume controls
Ballasts of fluorescent lamps
Bells and audio simulators
Chargers, accumulators, galvanic cells
Citizens' Band radio
Clocks, timers, relays, load commutators
Consumer electronics
Current controllers, voltage and power regulators
Data communication
Digital equipment
Electric installation work
Electric meters
Electric motors
Electric power supply
Electrical safety, fire safety
Electrician's reference book
Electrician's tools
Electricity for beginners
Equipment protection from emergency operation, uninterrupted power supply units
Field intensity detectors
Fluorescent lamps
For a musician
For an electrician
For an inexperienced radio amateur
For radio amateur constructors
For students
Frequency synthesizers
Grounding and neutral grounding
Halogen lamps
High-frequency power amplifiers
Home, garden, farmland, hobbies
Household appliances
Indicators, detecting devices, metal detectors
Infra-red equipment
Lightning protection
Measuring equipment
Microphones, wireless microphones
Mobile communication
Portable radio stations
Power amplifiers
Power controllers, thermometers, thermostabilizers
Power supply units
QRP equipment
Radiation indicators
Radio amateur computation
Radio amateur technologies
Radio control
Radio reception
Radio stations, transceivers
Reference materials
Security and alarm system using mobile communication
Security devices and alarm systems
Sound systems
Sound-to-light units
Upgrade of radio stations
Use of microcircuit chips
Various electronic devices
Voltage stabilizers
Voltage transducers, rectifiers, inverters
Welding equipment

Free online library on electronics Useful articles and background materials:
Art of audio
Art of video
Batteries and rechargeable batteries
Big encyclopedia for children and adults
Biographies of great scientists
Children's scientific lab
Entertaining experiments in chemistry
Entertaining experiments in physics
For builders and handymans
For lovers of travel. Tips for tourists
Fundamentals of health and safety
Fundamentals of medical first aid
History of engineering, technology, objects around us
Home workshop
Industrial technology at home - simple recipes
Labor protection
Lecture notes, cheat sheets
Life of great physicists
Miracles of nature. A fascinating journey around the globe
Spectacular tricks and their solutions
Personal transport: land, water, air
Riddles, puzzles, trick questions
Scale modeling
The most important scientific discoveries
Tools and mechanisms for agriculture
Typical labor protection instructions (Job descriptions)
Visual illusions

Free online library on electronics Free magazines:
A Radio. Prakticka Elektronika magazine
Amaterske Radio magazine
Circuit Cellar magazine
Electronique et Loisirs magazine
Electronique Pratique magazine
Elektor Electronics magazine
Elektronika dla Wszystkich magazine
Elektronika Praktyczna magazine
Everyday Practical Electronics magazine
Evil Genius magazine
Funkamateur magazine
Nuts And Volts magazine
QEX magazine
QST magazine
Radiotechnika Evkonyve magazine
Servo magazine
Stereophile magazine
Радио Телевизия Електроника magazine

Free online library on electronics Free audio, video, tvs schematic diagrams and service manuals:
Popular audio
Popular car audio
Popular DVDs
Popular faxes
Popular monitors
Popular monoblocks
Popular phones
Popular TVs
Popular video cameras
Popular video recorders and video players

Avest TVs
Beko TVs
Elenberg, Cameron, Cortland domestic radio electronics
Erisson TVs
Gorizont TVs
Rainford TVs
Rekord TVs
Roadstar TVs
Rolsen TVs
Rubin TVs
Vestel TVs
Vitjaz TVs

Power supply units for TV sets and video equipment

Free online library on electronics Free mobiles schematic diagrams and service manuals:
Benq-Siemens mobiles
Eastcom mobiles
Ericsson mobiles
Fly Bird mobiles
LG mobiles
Maxon mobiles
Mitsubishi mobiles
Motorola mobiles
Nokia mobiles
Panasonic mobiles
Pantech mobiles
Samsung mobiles
Sharp mobiles
Siemens mobiles
Sony-Ericsson mobiles
TCL mobiles
Voxtel mobiles

Free online library on electronics Free household appliances schematic diagrams and service manuals:
Beko household appliances
Braun household appliances
Candy household appliances
Elenberg household appliances
Elica household appliances
Gorenje household appliances
Hansa household appliances
Merloni household appliances
SEB household appliances
Snaige household appliances
Stinol household appliances
Universal household appliances
Whirpool household appliances

Free online library on electronics Free electric tools schematic diagrams and service manuals:
Bocsh electric tools
Makita electric tools

Free online library on electronics Free electric tools schematic diagrams and service manuals:
Bocsh electric tools
Makita electric tools

Free online library on electronics Free reference books:
Collection of dumps
Correspondence of models and chassis
Horizontal-output transformers by HR company
Horizontal-output transformers by Konig company
Integrated circuits, microcontrollers and transistors
Mechanisms of audio and video equipment
Radio components by Atmel
Radio components by Cirrus Logic
Radio components by Maxim
Radio components by Microchip
Radio components by Mitsubishi
Radio components by Motorola
Radio components by National Semiconductor
Radio components by Panasonic
Radio components by Philips
Radio components by Rohm
Radio components by Samsung
Radio components by Sharp
Radio components by Sony
Radio components by Toshiba
Remote controls for TV sets and monoblocks

News of science and technology




Order of schematic diagrams and service manuals Order of diagrams

Schematic diagrams to order:
World air conditioners
World audio
World car audio
World DVDs
World faxes
World fridges
World microwave ovens
World monitors
World monoblocks
World phones
World photo cameras
World projectors
World TVs
World video cameras
World video recorders
World washing machines

Have fun! Have fun!
Assembling the Rubik's Cube
Did you know?
Entertaining experiments at home
Funny puzzles
Interactive flash games
Optical illusions
Spectacular tricks and their solutions


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Free online library on electronics

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Free online library on electronics Free online library on electronics, Free encyclopedia of electronics and electrical engineering

All articles of the Free encyclopedia of electronics and electrical engineering are listed in alphabetical order. For automatic translation of articles into your native language, please use Translate it! form in the top left corner of the page.

For radio amateur constructors

For radio amateur constructors

For radio amateur constructors. Articles with illustrations and detailed explanations:

60 Hz from the clock resonator

A device for adding and subtracting two signals

A device for monitoring small Vage deviations

A harmonic signal generator with a quartz oscillator stability

A harmonic signal generator with a soft limiter

A quartz resonator converts non-electrical quantities to electrical ones

A simple Amplifier

A simple electronic switch

A simple frequency synthesizer

A simple high-frequency oscillator

A simple PWM generator

A simple PWM modulator

A simple synchronous frequency multiplier

A stable current generator for charging batteries and its use in the repair and design of radio-electronic means

A way of reanimation of fluorescent lamps

About calculating steps on a field-effect transistor

About ceramic capacitors

About the labeling of ceramic capacitors

About the noise immunity of household equipment

Accurate polarity converter

Adaptive receiver of pulses of slowly varying Alitude

ADC chips of the ICL71X6 family with reduced supply Vage

Adjustable touch switch

Advanced LED line Vage

Advanced version of the management system software

Amplifier with a discretely adjustable gain

Analog-to-digital converter from a sound card

Application of a gyrator in resonant Amplifiers and generators

Arduino. Acquaintance

Arduino. Analog I / O operations, working with sound

Arduino. Connecting the simplest sensors

Arduino. Digital I / O Operations

Bandpass filter on CMOS inverters

Bitmap font editor for graphic LCDs

Broadband aperiodic high-frequency Amplifier

Broadband phase shifters

Calculate the frequency response of narrow-band microwave filters

Calculation of strip microwave filters

Cascode Amplifier

Checking the LCD indicator

CHI-current regulator

Chip function generator

Chip Generator

Combined generator

Command receiver for an infrared remote control with USB interface

Communication via lighting electrical network

Configurable Notch Filter

Connect a large number of buttons to one input of the microcontroller

Contact suppressor pulse suppressor - pulse former

Contactless capacitive relay

Contactless capacitive sensors

Contactless proximity sensors

Controlled one-shot

Converting a potentiometer angle to a digital code

Cut-off frequency of multi-link filters

Decoder Logic Analyzer

Decoupling prefixes on a relay for loads up to 600 V

Demodulator of frequency-manipulated signals on active filters

Design issues for Amplifiers with general negative feedback

Designing electronic starting controls for fluorescent lamps

Determination of the saturation current of inductors with magnetic cores

Device for detecting moving metal objects

Device for monitoring moving parts

Device for reading / writing magnetic cards

Devices on a MAX869L chip

Digital Frequency Converter

Digital frequency multiplier

Digital Vage Indicator


Diode Generator

Easy setup of complex LC filters

Economical Triac Control

Electrocommutation instead of electronic systems

Electronic Fuse

Features of the use of varicaps

FET Control in Pulse Converters

Filter to power the electric motor

Filter with tuning from 200 kHz to 20 MHz

Floating power to the differential Amplifier

Formation of a periodic signal phase shift

Formation of a switch-on delay

Four analog Amplifiers on two CMOS digital circuits

Free Energy Hub

Frequency Coding System

Frequency divider - pulse distributor

Frequency Divider Input

Frequency divider with adjustable division factor

Frequency dividers with a fractional division factor

Frequency dividers with square mean output

Generator on an analog tunnel diode

Generators on a KR1446 series operational Amplifier

Generators with a stable Alitude

GPS - is it all that simple and reliable?

Hand movement control

Harmonic Quartz Generators

High Frequency Signal Converter

High Linear Alitude Modulator

High-performance frequency converter on electronic keys

High-speed RC-232 interface with optoisolator

High-voltage Amplifier for controlling piezoelectric elements

How to connect a button and LEDs to one pin of a microcontroller

How to recognize an advertisement in a television signal

Improvement of the speed control of three-phase asynchronous motors

Instead of neon

Integral timer as an input stage operating from a long line

Integrated Timer in the Temperature-Frequency Converter

Intercom per 100 subscribers

Intermittent signaling on bipolar transistors

Inverter for triac

Isolation of power circuits of analog and digital channels

Key synchronous detector

LC Multivibrator

LF Generator on a Tunnel Diode

Long Pulse Shaper

Membrane Keyboard

Microcontroller module on the ATmega8 in the TQFP package

Micropower converter for powering varicap


Mixer with a large dynamic range

Modeling radio reception in terms of noise and interference

Modulated high-frequency generator

Multi-input sensor device

Multi-position slide switch

New features of the LCD raster font editor

Number pulse generator

Optoelectronic relay

Phase-Inverted Cascade

Photomechanical sensor

Photoresistor generator

Power transistor in avalanche mode

Precision displacement meter

Programmable Vage level generator

Protecting equipment from high-voltage impulses in the network

Protection of electronics against temperature rise

Protection of high-power LEDs from excessive current

Pulse Amplifier of a Short-Range Radar System

Pulse generator

Pulse generator with independent control of frequency and duty cycle

Pulse generators - sound indication elements

Pulse generators on the flashing LED

Pulse sequence former

Pulse Width Discriminator

Push-button console

Push-pull transmitter for telecontrol

Quadrature mixer on the counter waves

Quartz oscillator for low-active resonators

Radio surveillance from satellites for earthquake precursors

Ramp Vage generator on CMOS elements

Rectangular Pulse Generators on CMOS ICs

Rectifier ... on a logical element

Rectifier with a low level of pulsations

Refinement of the frequency meter control unit

Regulated analogue of the dynistor

Replacing the optothyristor T0125

Research of PSpice-models of analog radio elements

Restrictive and rectifying-restrictive diodes

RF barrier generators on bipolar transistors

Sawtooth generator

Sawtooth generator at 555 timer

Scheme providing a scan along the diagonal axis of any oscilloscope

Scheme that generates large delays

Selection of capacitors of the same capacity

Signal Generators

Simple keyboard

Sine Wave Synthesizer

Sine-wave generator on a digital chip

Single Pulse Indicator

Sound module on a single chip

Sound Switch

Square Wave Generator

Stable crystal oscillator

Stable current generator

Superregenerator with switched LC circuit

Symmetric broadband transformers and ferrite tube chokes

Temperature Sensor

The reference signals of frequency and time

Thermostable pulse generator

Touch Memory - email ID

Touch reversing switch

Triac Control Site

Trigger on optocouples

Trigger on transistor optocoupler

Turning on and off with one button

Turning the transistors on a chain

Two CMOS oscillators

Two sine-wave oscillators on logic

Two-channel narrow-band Vage controlled oscillator to adjust the Alitude-frequency characteristics of quartz filters

Two-threshold comparator

Two-way communication

Ultra low-voltage LED emitters

Unbalanced Multivibrator

Unidirectional Counter

Unusual mode of operation of the field-effect transistor

Unusual use of CMOS switches

Use of small-sized jamming suppressors of amorphous metal alloys

Using old parts in Vage multipliers

Using Telecontrolli wireless communication devices

Using the Miller effect during timed RC circuits

Using Tunnel Diodes

Voice Message Encryption

Voltage doubling synchronous detector

Voltage multipliers

Voltage polarity converter on switching capacitors

What does a phone card suit?

When there is no zener diode

Wired remote control