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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

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

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


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

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

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

Bocsh electric tools
Makita electric tools

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


ORDER OF DIAGRAMS  Order of schematic diagrams and service manuals

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

Russian amplifiers
Russian b-w TVs
Russian car audio
Russian color TVs
Russian electrophones
Russian monitors
Russian radio
Russian r-gramophones
Russian tape recorders
Russian testers
Russian video recorders

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



Design and support:
Alexander Kuznetsov

Technical maintenance:
Mishell Bulah

Daniel Monchukin

Tatyana Anastasyeva

Natalya Kuznetsova

Contact us

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created in Ukraine
created in Ukraine

Free online library on electronics

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

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Free encyclopedia of electronics and electrical engineering / Articles

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.


Vacuum cleaner for oil

Vacuum cleaner

Vacuum Cleaner

Vacuum cleaners

Vacuum fluorescent indicator ILTS1-6 / 7M

Vacuum fluorescent indicator ИВЛШУ1-11 / 2

Vacuum fluorescent indicator ИЛД1-М

Vacuum fluorescent indicator ИЛЦ1-5 / 7М

Vacuum fluorescent indicators for measuring equipment ILTS1-6 / 7L and ILTS1-7 / 8LV

Vacuum fluorescent indicators ИЛЦ1-1 / 7, ИЛЦ2-1 / 7, ИЛЦ1-1 / 9

Vacuum fluorescent indicators ИЛЦ5-5 / 7Л, ИЛЦ7-5 / 7ЛВ

Vagranschik. A typical safety manual

Valaam's donkey

Valcoder - from the mouse

Valcoder from the mouse

Valley of Monuments

Valley of the Ten Thousand Smokes


Vanishing Cube

Vanishing photo

Vanity Fair

Vanity of vanities and all sorts of fuss



Var, Var, return my legions to me!

Varactor Morator at 430 MHz

Variable slope filter

Variant of control unit of VHF receiver with frequency synthesizer on LM7001 chip

Variant of the mechanism drive switch

Variants of electronic ballast, realized by the scheme of a single-cycle autogenerator converter

Variants of fixed bias of a 6H13C lamp

Variants of the equipment of objects for video observation

Variants of the zigzag antenna of Kharchenko

Varicap Power Supplies

Varieties of grounding systems

Varieties of one circuit (unbalanced multivibrator)

Varnish for drawings

Varnish for gilded baguettes

Varnish for metal products

Varnish for optical instruments

Varnish for rubber galoshes

Varnish for rubber products

Varnish for straw hats

Varnish for the skin

Varnish for tools

Varnish for wallpaper

Varnish made from hard rubber (ebonite)

Varnishes for metals

Varnishes for white sheet metal

Varnishes for wood

Varnishes from resinous esters

Varnishes, impregnating, covering, gluing

Varnishes, mordants and other products for skin and shoes

Vase on lathe

Vase Tantalus

Vavilov Nikolay

VCO on the K0308018 chip

VCR capabilities for recording high-quality sound, maintenance and repairs

Vegetable slicer from the washing machine

Vegetable slicer

Vehicle battery voltage indicator

Vehicle Hand Brake Warning Signal

Vehicle heater control unit

Vehicle security device

Vehicle security system with satellite tracking of coordinates and transmission of alerts via GSM channel

Vehicle vibration isolation

Velcro fastening




Velocator voltage regulator


Velo-electric power station

Velokhara on light-emitting diodes



Veloveuk with pockets


Velvet Revolution

Venereal diseases and their prevention

Venereal diseases

Ventilation and heating of industrial premises

Ventilation control in the kitchen

Ventilation of the workplace


Verb burning people's hearts

Verbal Morse Code Expressions

Verhalaznye work using the methods of industrial mountaineering. A typical safety manual

Verhalaznye work. A typical safety manual

Verna 150-03 Speaker System

Vernadsky Vladimir

Versatile site

Versta Kolomna

Vertical antenna at 144 MHz

Vertical antenna for low-frequency bands

Vertical antenna on low-frequency bands

Vertical antennas for low-frequency ranges

Vertical Directional Antenna

Vertical Drilling Machine

Vertical Loop Antenna (LOOP)

Vertical multi-band antenna UW4HW

Vertical Multi-Band Antenna

Vertical opening of the garage gate

Vertical Top Power

Vertically floating match

Very loud alarm clock

Very timely book

Vesalius Andreas

Vessel on bottles


Vesuvius Volcano

Veterans do not age the soul

Veterinary assistant. Job description

Veterinary Physician. Job description

Vetroelectric Power Station

VFO on transistors

VFO with electronic reconfiguration


VHF - FM stereo tuner 60-108 MHz on the TDA7021T chip

VHF - FM tuner

VHF / CB radio in the housing of the subscriber loudspeaker

VHF antenna of YAGI type at 144 MHz

VHF antenna with J-matching

VHF antenna with vertical polarization

VHF Antenna

VHF Antenna

VHF antennas from sets of typical elements

VHF beacon

VHF block (144, 430 MHz)

VHF converter at 144 MHz

VHF converter of the range 128-148 MHz in the range of 88-108 MHz

VHF converter on the K174PС1 chip

VHF converter with notch filter

VHF converter with quartz stabilization

VHF Converter

VHF converter

VHF converter

VHF converter

VHF converter

VHF FM radio receiver Aurora Millenniem

VHF FM radio station

VHF FM radio station

VHF FM receiver on m / s KHA058

VHF FM receiver on one transistor

VHF FM receiver on one transistor

VHF FM receiver with cavity resonator

VHF FM receiver with cavity resonator

VHF FM receivers with PLL

VHF FM transmitter

VHF FM tuner

VHF FM tuner

VHF Frequency Synthesizer

VHF frequency synthesizer

VHF frequency synthesizer

VHF local oscillator with PLL

VHF loop antenna from a coaxial cable

VHF micro transmitter to the phone

VHF power amplifier

VHF Power Amplifier

VHF prefix for DV-SV receiver

VHF prefix for the VEF-12 receiver

VHF prefix to the receiver of direct amplification

VHF radio frequency synthesizer control unit

VHF radio on the KHA058 chip

VHF radio on the KHA058 chip

VHF radio receiver at KHA-058

VHF radio receiver in the Selga-405 package

VHF radio receiver on KHA058

VHF radio transmitter

VHF radio with FM in the frequency range 64... 108 MHz and low-voltage power supply

VHF radio

VHF receiver (monitor) Harry Litala

VHF receiver from pre-made blocks

VHF receiver in the Marlboro package

VHF receiver on the K174XA42 chip

VHF receiver on the K174XA42A chip

VHF receiver with PLL

VHF receiver with PLL

VHF receiver

VHF receiver

VHF reflectometer (100-600 MHz)

VHF Scatter Receiver

VHF Stereo Tuner

VHF super regenerator

VHF super-regenerator with a loop antenna

VHF transverter at 144 MHz

VHF transverter prefix

VHF tuner on the K174XA34 chip

VHF tuner on the K174XA34 chip

VHF tuner on the KS1066XA1 chip

Vial of bliss drink

Vibrating circuit

Vibrating device

Vibration and protection from it

Vibration sensor for car security device

Vibration sensor for security device


Vice of pliers

Vice with reducer

Vice-rector for academic work of a higher educational institution. Job description

Vice-rector for educational activities and social issues of a higher educational institution. Job description

Victim of social temperament

Victoria Falls

Video Doorphones

Video editing for beginners

Video editing of the wedding

Video editing operator TV. Job description

Video editing techniques

Video editing. Basics for beginners

Video editing. The gluing language

Video Engineer of Creative Programs Department. Job description

Video Engineer of the Air Service. Job description

Video Engineer. Job description

Video Games

Video Operator. Job description

Video power splitters

Video Power Splitters

Video Processors of the TDA88xx series

Video signal clock regenerators

Video Signal Controller

Video signal generator on the PIC controller

Video signal transmitter on the KR1043XA4 chip

Video Signal Transmitter

Video splitter

Video Transmitter

Videography of weddings and true human feelings

Videography with imitation for movies

Videography: advice from an amateur

Videorecorders. Secrets of repair

Viet Francois

View and something

Viewer pulls out maps conceived by others

Viewers do not guess in which hand the coin

Viewing mini-pit in the garage



Violation of labor protection rules

Violence - the midwife of history

VIPER-100A and a pocket charger based on it


VirtualDub. Quick guide and tips

Vise in the Clamp

Visible switch at night

Vision Device

Visual controls

Voice Alarm

Voice control of hardware

Voice Management System

Voice memo on the ISD1416 chip (ISD1420)

Voice Relay

Voice S-meter

Voices are weighed, not counted

Voices of combs

Volcano on the table

Volcano Popocatepetl


Volchok in technology

Volga flows into the Caspian Sea

Voltage and Current Meter

Voltage auto-switch for the charger

Voltage auto-switch for the charger

Voltage changeover switch

Voltage converter - charger

Voltage converter + battery charger

Voltage converter 12/1000 volts

Voltage converter 12/220 V - 50 Hz

Voltage converter 12-1000 volts

Voltage converter 2,4 / 8 V for supplying the security alarm

Voltage converter 5/12 volts

Voltage converter 5/9 volts for supplying radio receivers

Voltage converter for battery equipment

Voltage converter for boost, 5-9 / 9-12 volts

Voltage converter for cell phone chargers, 12/300 volts

Voltage converter for cell phone chargers

Voltage converter for electric razor, 12/220 volts 2.5 ampere

Voltage converter for feeding the varicaps of a satellite receiver, 15/36 volts

Voltage converter for flash

Voltage converter for household appliances

Voltage converter for LDS power supply with a power of 20-80 W

Voltage converter for LED flashlight

Voltage converter for LED lamp

Voltage converter for LED

Voltage converter for portable flashlight

Voltage converter for power supply from the galvanic element of electronic devices

Voltage converter for powering portable radios

Voltage converter for powering the photoelectric multiplier

Voltage converter for radio-controlled model

Voltage converter for supplying the varicap

Voltage converter for the car, 13,6 / 36,127,220 volts 40 watts

Voltage converter for the Ts20 automatic meter

Voltage converter on microcircuits, 12/24 volts

Voltage converter on the K155LA13 chip

Voltage converter on the K155LA18 chip

Voltage converter on the microcontroller for supplying the measuring instrument

Voltage converter on the timer 1006VI1, 12/30 volts

Voltage converter with SHI modulation

Voltage converter with SHI stabilization

Voltage converter with Shi stabilization

Voltage converter, + 12 / -10 volts

Voltage converter, + 12 / -5 volts

Voltage converter, 12/22 volts 2 ampere

Voltage converter, 12/220 volts 100 watts

Voltage converter, 12/220 volts 100 watts

Voltage converter, 12/220 volts 100 watts

Voltage converter, 12/220 volts 30 watts

Voltage converter, 12/220 volts 5 watts

Voltage converter, 12/220 volts 60 amps 720 watts

Voltage converter, 12-16 / 24 volts 3 amps

Voltage converter, 12-30 volts

Voltage converter, 220/30 volts 200 watts

Voltage converter, 2х12-18 volts

Voltage converter, 4.5 (9) / 15 volts 0.2 watts

Voltage converter, 5 volts

Voltage converter, 6/12 volt 0.8 ampere

Voltage converter, 6/2 volts

Voltage converter, 9/400 volts 90 milliampere

Voltage converter

Voltage Detector

Voltage Difference Indicator

Voltage Differential Indicator

Voltage Doubler on UHF IC

Voltage Indicator for the Extension Cable

Voltage indicator with sound indication

Voltage Indicator

Voltage Inverter, 12/220 volts 100 watts

Voltage level indicator in the network

Voltage Multipliers

Voltage network voltage meter with a stretched scale

Voltage polarity converter on switched capacitors

Voltage polarity converter, 15 volts 0.1 Ampere

Voltage polarity converter

Voltage polarity inverter, 12 volts 0.1 Ampere

Voltage regulator 0-218 volts

Voltage regulator on the chip LX8384-00CP, 3-10 / 1,25-7 volts 5 amps

Voltage regulator with a small difference in input and output parameters

Voltage regulator with current limiter, 12-15 volts 3 amps

Voltage regulator with indicator

Voltage regulator with phase-impulse control

Voltage regulator, 11-20 / 9 volts 0.5 Ampere

Voltage regulator, 11-20 / 9 volts 0.5 Ampere

Voltage regulator

Voltage regulators of the series KR1158 and KF1158

Voltage relay with buzzer

Voltage stabilizer 35-70 volts

Voltage stabilizer for 35 volts

Voltage stabilizer for bicycles

Voltage stabilizer for car battery, 12.6 / 9 volts 0.3 ampere

Voltage stabilizer for car battery

Voltage stabilizer for car battery

Voltage stabilizer for heavy motorcycles

Voltage stabilizer for op amps, 0.2 ampere

Voltage stabilizer for supply UMZCH, 19 volts 20 amps

Voltage stabilizer for ULF, 12-15 volts 0.7 Ampere

Voltage stabilizer for UMZCH on the TDA2030 chip

Voltage stabilizer in the network adapter

Voltage stabilizer of alternating current, 135... 270/197... 242 volts 5 kilowatts

Voltage stabilizer of bike rack

Voltage stabilizer of solar batteries

Voltage stabilizer on a powerful field effect transistor

Voltage stabilizer on a powerful field effect transistor

Voltage stabilizer on KR1158xx ICs

Voltage stabilizer on optocoupler

Voltage stabilizer on the ADP3301 chip

Voltage stabilizer on the chip K174UN7, 8-16 volts 1 ampere

Voltage stabilizer on the chip KR142EN19 with protection, 27 / 7-25 volts 2 ampere

Voltage stabilizer on the CMOS chip

Voltage stabilizer on the comparator, 19-30 / 5 volts 2 ampere

Voltage stabilizer on the K142EN2 chip

Voltage stabilizer on the operational amplifier, 37 / 25.2 volts 0.2 ampere

Voltage stabilizer protected against output short-circuits, 21 / 2-12 volts 0.3 ampere

Voltage stabilizer protected from output short-circuits, 21 / 2-12 volts 0.3 ampere

Voltage stabilizer with current protection on the chip KR142EN19

Voltage stabilizer with double protection, 40 / 3-30 volts 2 amps

Voltage stabilizer with FET transistor with overload protection, 14-24 / 10 volts 1 ampere

Voltage stabilizer with field effect transistor, 11-19 / 9 volts 0.1 ampere

Voltage stabilizer with field effect transistor, 11-19 / 9 volts 0.1 Ampere

Voltage stabilizer with low minimum voltage drop

Voltage stabilizer with microcontroller control

Voltage stabilizer with microcontroller control

Voltage stabilizer with overload protection 13,8V / 10A

Voltage stabilizer with overload protection, 10 amps

Voltage stabilizer with overload protection, 13.8 volts 10 amps

Voltage stabilizer with parallel integrated circuits, 5 volts 6 amps

Voltage stabilizer with protection, 14-20 / 12 volts 0.5 Ampere

Voltage stabilizer with short-circuit and overcurrent protection, 14-20 / 12 volts 0.5 Amperes a>

Voltage stabilizer with short-circuit protection, 13-16 / 9 volts

Voltage stabilizer with short-circuit protection, 14-16 / 9 volts

Voltage stabilizer with temperature compensation

Voltage stabilizer, 10-16 / 9 volts 0-1 ampere

Voltage stabilizer, 20 volts 7 ampere

Voltage stabilizer

Voltage stabilizers with a regulating transistor in the negative wire

Voltage stabilizers with the KR142EN19A chip

Voltage swing indicator

Voltmeter for laboratory power supplies

Voltmeter is an indicator for the laboratory power supply

Voltmeter on the K1003PP1 IC chip

Voltmeter on the LED

Voltmeter with a linear scale

Voltmeter with improved linearity

Voltodobavka in the welding machine

Volume and timbre control on the KR174XA54 chip

Volume and tone control of the modern stereo complex

Volume Control for IBM PC System Dynamics

Volume control with buffer cascade

Volume control with electronic control

Volume control with touch control

Volume, balance and timbre control on the TDA1524A chip


Vortex rings

Vortex tubes

Vote or lose!

VOX for the FT-840M

Voyager Aircraft


Vulcanization and tire fitting works. A typical safety manual

Vulcanizer. A typical safety manual

Vulnerable Place