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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.

Ugly Duckling


UHF based on the A2030 chip

UHF for the receiver

UHF in the Mayak radio station

UHF Switching Power Supply, 200 watts

UIAA node

UkB receiver is in the package MARLBORO

ULF 120 watts with bass reflex

ULF and active bandpass filter on quadruple opamp for direct conversion transducer

ULF for PC based on TDA7057AQ chip, 4-channel

ULF with unipolar 12-volt power supply

Ultra Low Voltage Transformer, 1.5 volts

Ultra short-wave antennas

Ultra-bright LED - the basis of energy-saving lighting

Ultra-bright LED in the flashlight

Ultra-deep well drilling

Ultra-linear amplifier using 6N2P, 6P14P lamps

Ultra-linear amplifier with microphone input

Ultra-low-frequency metal detector

Ultra-miniature switching power supply in thimble dimensions

Ultra-regenerative receiver at 80-125 MHz

Ultra-regenerative receiver at 90-150 MHz

Ultra-regenerative receiver for 90... 150 MHz

Ultra-short waves

Ultrasonic amplifier on 6N2P, 6P14P lamps 12 watts

Ultrasonic auto-care

Ultrasonic delay lines

Ultrasonic depth gauge

Ultrasonic fire alarm

Ultrasonic Flaw Detector

Ultrasonic generator for repelling rats

Ultrasonic mouse repeller

Ultrasonic security device

Ultrasonic Vulcan-1 Inhaler

Ultrasonic washing machine

Ultrasonic washing machine

Ultrasound against mosquitoes

Ultrasound against mosquitoes

Ultrasound against rodents

Ultrasound cat

Ultrasound octane meter of gasoline

Ultrasound transducer MUP-1

Ultraviolet intensity meter

Ultra-wideband amplifier

Um is immature, the fruit of a short science!

UM-3 power amplifier - useful improvements

Uma Chamber

Umbilical hernia

Umbrella and ball

Umbrella and scarves

Umbrella and Separator


UMD with inductive correction


Umformer and Vibrating Rectifier

UMHC for the computer

UMHR with a deep OOS

UMLA protection system

UMTSh Kindtree-A140m on the TDA7294 chip

UMV Converter

UMWC with a power of 320 W on the STK4231 chip

UMZCH based on the operational amplifier KR544UD2

UMZCH for automotive radio equipment

UMZCH for computer monitor

UMZCH for portable radio

UMZCH for the player

UMZCH in the computer's system unit

UMZCH on field-effect transistors

UMZCH on MIS transistors

UMZCH on the TDA7294 chip

UMZCH with a broadband OOS

UMZCH with a symmetric input without a common DUS

UMZCH with a voltage amplifier according to the scheme with a common base

UMZCH with adjustable output resistance

UMZCH with an output stage on field-effect transistors

UMZCH with complementary field effect transistors

UMZCH with small intermodulation distortions

UMZCH with unipolar power supply

UMZH in Class B with a combined OOS

UMZH without general feedback

Unavailable treat

Unbalanced multivibrator

Unbearable lightness of being

Unbinding prefixes for relays for loads up to 600 volts

Unbreakable handkerchief

Unbreakable loop

Uncle Sam

Unclear coin balance

Uncontrolled circuits for transmitters

Uncorrect Letter

Uncrepared car ULF

Undamped sound of an electric guitar

Undemanded Eye

Under no sauce

Under pressure

Under the fly (to be)

Under the mute

Under Tsar Gorokh

Under what name was Pharaoh Tutankhamun ascended to the throne and why did he change it?

Under your fig tree

Underground Box

Underground management of an illusionist in a circus

Underground millionaire

Understand in sausage scraps

Understanding pretty

Undervoltage protection

Underwater camera box

Underwater Glider

Underwater Lightning

Unemployment. State policy in the field of employment

Unexpected appearance of the clock

Unexpected cork jump

Unfavorable consequences of exposure to labor conditions per person

Unfolding a candy wrapper

Unfortunate is the country that needs heroes


Unharmed bill

Unicum AC power source

Unified Energy Modules for Small Hydro Power Plants

Unified Power Transformers - Directory

Unified State System for Preventing and Eliminating Emergency Situations

Unijunction transistors of the KT133 series

Unijunction transistors

Uninterrupted power supply of the transceiver

Uninterruptible power supply VM1061 with switchable output voltage

Uninterruptible Power Supply, 220 W

Uninterruptible Power Supply

Uninterruptible Power Supply

Union of sword and plowshares

Units of length measurements

Units of measurement used in electrical engineering and electronics

Units of time measurements

Universal ballast with warm start for T8 fluorescent lamps

Universal battery of 1.5-12 volts

Universal cable diagram for mobile phones

Universal Cable Scheme (GSM box)

Universal car device

Universal car probe (two in one)

Universal car USB adapter for K-, L-lines

Universal car, apartment, garage security device

Universal Charger and Power Supply

Universal charger for batteries SC-21, SC-32, D-0.06, D-0 , 1, D-0,25, D-0,55, 7Д-0,115, 316, 332, 3336

Universal charger for nickel-cadmium batteries

Universal charger for small batteries

Universal charger LiIon, NiCd, NiMH batteries on the MAX1501 chip

Universal charger

Universal charger-discharge device for small batteries

Universal Cinderella farm

Universal clamp

Universal clock-timer

Universal controller block on the LM1040 chip

Universal Cube

Universal Detector

Universal device for testing ISP

Universal device for water activation

Universal device on the microcontroller: clock, thermometer, thermostat, alarm, remote control

Universal Digital Filter

Universal Digital Scale

Universal electric mower

Universal Electrician Tester

Universal electronic thermometer

Universal FM FM receiver

Universal four-spindle machine

Universal free-flying model

Universal Frequency Modem

Universal Function Generator

Universal generator-probe

Universal hairpin

Universal high-precision heat stabilizer

Universal History. Cheat Sheet

Universal housing

Universal Indicator Probes

Universal Indicator Tester

Universal indicator

Universal LED indicators of current overload for power supplies

Universal lighting control scheme with several switches

Universal load equivalent

Universal low-voltage power supply

Universal machine

Universal matching device

Universal matching device

Universal mechanical template for models

Universal Metal Detector

Universal microcontroller charger

Universal micro-machine

Universal Mini Drill

Universal multiphase motor control unit

Universal network filter and its design

Universal notification device

Universal panoramic SDR-prefix for HF transceiver

Universal Parallel Adapter

Universal power supply for radios

Universal power supply, 2-12 volts 1 ampere

Universal power supply, 2-300 volts 0.9 amperes (2-22 volts 6 amps)

Universal Power Supply

Universal powerful power supply, 220 / 3-20 volts 500 watts

Universal probe for checking the validity of transistors

Universal probe with ion-exchange nutrition

Universal Probe

Universal Probe

Universal Programmable Timer

Universal programmer UNIPROG

Universal Protection Unit AS

Universal radio alarm

Universal Rectifier for charging batteries

Universal rectifier with electronic regulation for charging batteries

Universal security device

Universal security device

Universal Simulator

Universal stand for micromotors

Universal Thyristor Controller

Universal timer for the charger

Universal Timer on the PIC Controller

Universal varnish

Universal VHF FM receiver 70-l50 MHz

Universal VHF-FM Receiver SEC-850M

Universal voltage converter, 5 volts

Universal voltage regulator and charger for the car

Universal Wagon

Universal Workbench

Unknown God

Unknown soldier

Unleashing a running simple node

Unleashing a simple node

Unleashing a weaving knot

Unleashing self-tightening knot

Unleashing the eight

Unloading of bitumen, tar, tar. A typical safety manual

Unloading railway cars. A typical safety manual

Unloading the timber transport rolling stock with LT-10 (RRU-10M) and jaw-type timber loaders. A typical safety manual

Unlocking Siemens mobile phones

Unlucky Man

Unmistakable repetition

Unscrew the lamp and do not get hurt

Unscrewing deep screws and screws

Unsharp Paper

Unstable bucket

Unsupported mediocrity

Unter Prishibeyev

Untimely thoughts

Untying ropes

Unusual AM Detector

Unusual application of audio with DOLBY SURROUND PRO LOGIC

Unusual application of CMOS switches

Unusual application of the chip KR142EN19A

Unusual application of the chip KR142EN19A

Unusual ash

Unusual ball

Unusual board

Unusual candle lighting

Unusual Chip Professions

Unusual Cigarette Case

Unusual coin

Unusual cylinder

Unusual delivery

Unusual envelope

Unusual FET operation

Unusual Glass

Unusual goldfish

Unusual Isotron Antenna

Unusual letters

Unusual match lighting

Unusual matches

Unusual meal

Unusual memory

Unusual methods

Unusual photo

Unusual rope

Unusual site

Unusual Vase

Up on the stick

Up the ramp

Up the stairs that lead down

Updating the car voltage regulator 59.3702-01

Updating the circulation

Updating the indicator Ц215

Upgrade the flashlight

Upgrade the six-string guitar

Upgraded Celin Transceiver Transceiver Path

Upgraded GPA for YES-98M transceiver

Upgraded shovel

Upgraded welding mask

Upgrading ALAN radio stations

Upgrading AS 35АС-012

Upgrading columns

Upgrading the 25АС-121 loudspeakers

Upgrading the car radio

Upgrading the counterbalances of the antenna

Upgrading the dynamic head of 20GDS-1

Upgrading the ignition unit

Upgrading the Katran radio components

Upgrading the RA3AAE Transceiver

Upgrading the sound probe

Upgrading the TECSUN receiver

Upgrading the transverter of S. Zhutyaev (144 MHz)

Upgrading the UW3DI Transceiver

Upgrading the UW3DI Transceiver

Upholsterer of coffins. A typical safety manual

Upholstery of the front door

Upper Volta with ballistic missiles

UPS-automated inverter-charger, 12/220 volts 1 kilowatt

Upside down

Urban Ecology

Urban Wastewater


Urology. Cheat Sheet

Urology. Lecture notes

USB and FireWire bus

USB charger for LiIon batteries

USB connector in the car

USB connector in the lab power supply

USB meter LC

USB Module Ke-USB24A

USB oscilloscope on the microcontroller

USB port - power supply 6-15 volts

USB Port - Switch

USB programmer of microcontrollers AVR and AT89S, compatible with AVR910

USB thermometer on the microcontroller

USB time signaling device

USB-COM-LPT converter on the microcontroller

USB-voltage recorder with oscilloscope functions, spectrum analyzer and AFC meter

Use of a thermocompensated opto-coupler in voltage converters. Part 1

Use of barrier-resistive elements - baristors in power supplies

Use of bleach for disinfection of industrial premises. A typical safety manual

Use of solid-state optoelectronic relays of average power

Useful bag

Useful thread

Useful tips for using miniDV tapes

Useful tips for video editing

Useful Tips

Useful Wonders

User (operator) of the computer (PC). A typical safety manual

User of personal computers of PC. A typical safety manual

Using a bedpan

Using a construction hair dryer for repairs

Using a digital camera as a camcorder

Using a heat pump to receive thermonuclear energy

Using a single-phase network to power a three-phase motor

Using a transformer from the TV

Using Airlifts in Wind Turbines

Using an integral timer for automatic voltage monitoring when charging batteries

Using an optocoupler in a phone caller

Using an optocoupler in the feedback loop of the voltage regulator or charger

Using Antenna Amplifiers

Using AVerTV Capture HD in VirtualDub

Using biogas in everyday life

Using cold

Using computer power supplies

Using conventional capacitors in surface mounting

Using D-0.1 batteries

Using digital radio relay stations for the last mile

Using electroacoustic feedback in active speakers

Using gas burners in open telephone wells. A typical safety manual

Using Heat Pumps Abroad

Using high-voltage network transformers

Using integrated voltage regulators KR142

Using loop vibrators in trunked radio communication

Using Manipulation

Using network wires as an alarm loop

Using old parts in voltage multipliers

Using old printed circuit boards

Using PIN diodes as attenuation and switching elements

Using Plans for Video Recording

Using products using biogas technologies

Using protective circuit breakers in various network systems

Using sealed Ni-Cd batteries

Using solar cells

Using solar energy

Using solar modules

Using solar photovoltaics

Using technical means of training. A typical safety manual

Using Telecontrolli wireless devices

Using the 6АС-2 speaker system with a non-standard amplifying device

Using the gyro in resonant amplifiers and generators

Using the heat pump in the Poniatowski power plant

Using the K174PС1 chip

Using the K548UN1 chip

Using the KR512PС10 chip

Using the Miller effect during the target RC circuits

Using the services of specialized organizations in the field of labor protection

Using the TL494 Family in Power Converters

Using ultrasound

Using visual and auditory orientation markers

Using water from natural reservoirs as a cooler

Using wind power

Ussuri region

Uterine bleeding


UZCH on the A2030 chip (2x180 watts)

UZCH Output Cascade

UZH for a receiver with low-voltage power supply