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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


Design and support:
Alexander Kuznetsov

Technical maintenance:
Mishell Bulah

Daniel Monchukin

Tatyana Anastasyeva

Natalya Kuznetsova

Contact us

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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.

Rabbit from sawdust


Race of the Lords - a race of slaves

Races of the Rasterjaevaya Street

Racing car Leningrad-2

Racing car Lotus-56В

Rack on a lathe

Racks for home theater equipment

Radar detector

Radar detectors, theory


Radars, theory

Radiation control on contaminated by artificial radionuclides. A typical safety manual

Radiation hazard indicator

Radiation indicator in the radio

Radiation Indicator

Radiation Indicator

Radiation Intelligence

Radiation safety standards

Radiation sensor in the security system

Radiation-hazardous objects

Radiators and cooling


Radio - it's a digital frequency meter

Radio alarm for hunters

Radio alarm system based on the radio station URAL

Radio amateur Antisone for the motorist

Radio amateur communication technologies based on VoIP

Radio Amateur Radio

Radio antennas

Radio at 420... 435 MHz

Radio beacon of the 1300 and 2400 MHz bands

Radio breaker with protection against unauthorized activation

Radio Broadcasting Network - Emergency Power Source

Radio calculator

Radio communication on VHF

Radio connection of two faxes

Radio connection of two faxes

Radio Contest-RX

Radio control by three loads on RF modules using microcontrollers

Radio control device (radio key) for 3 commands

Radio control device for 12 teams

Radio control equipment for models

Radio control for 15 teams, 433.92 MHz

Radio control system for toys

Radio controlled outlet

Radio Extender of COM Port

Radio for country houses

Radio forget. Security system

Radio Game Find the Mine

Radio Interference Generator

Radio KR8068 (on the chip CXA1191M)

Radio microphone for lecturers

Radio microphone on three transistors

Radio microphone on two transistors

Radio microphone with loop antenna

Radio Microphone

Radio microphone

Radio modem at 2400-76800 baud

Radio noise generator for blocking radio traffic

Radio observations with satellites behind earthquake precursors

Radio of the amateur angler

Radio on 430... 440 MHz (on the lamps)

Radio on the K174XA10 chip

Radio on the TDA7000 chip (174XA42)

Radio on the TDA7000 chip (174XA42)

Radio on two transistors

Radio probe

Radio pulse frequency multiplication

Radio receiver powered by... multimeter

Radio receiver powered by free energy

Radio reception... without radio

Radio reception

Radio Safety

Radio Search for Pets

Radio security device

Radio security system for the shell

Radio Sensor

Radio set-top box to auto-guard

Radio station Astra-1-FM-CB

Radio station at 5650-5670 MHz

Radio station manager. Job description

Radio station on three transistors

Radio station output stage

Radio station with AM

Radio Super-Test

Radio telephone of RTF-92

Radio transceiver to Katran radio receiver (Р-399)

Radio Transceiver

Radio transistors

Radio transmitter for security alarm

Radio transmitter with AM in the frequency range of 27-30 MHz

Radio transmitter with compact loop antenna

Radio transmitter with fixed frequency of master oscillator

Radio transmitter with FM in the frequency range 1-30 MHz

Radio transmitter with FM in the VHF frequency range 61-73 MHz

Radio transmitter with high carrier frequency stability

Radio transmitter with quartz frequency stabilization of the master oscillator

Radio tuning

Radio uninterruptible power supply unit

Radio wave detector with a linear scale of eight LEDs

Radio waves. ranges of radio waves

Radio with a detector based on a candle flame

Radio with a loop antenna

Radio with amplitude modulation

Radio with field effect transistors

Radio-76 Transceiver

Radioactive contamination

Radioactive radiation. How can I find it?

Radioactivity indicator


Radio-controlled aerobatic model

Radioelectronic security of the village

Radio-frequency eavesdropper searcher

Radio-frequency eavesdropper searcher

Radiologist in the X-ray department (cabinet). Job description

Radiologist. Job description

Radio-measuring work. A typical safety manual


Radiostation Len - on the 29 MHz FM

Radiotelephone from the handset

Radiotelephone from the radio station

Radiotelephone interface for simplex radios

Radiotelephones and all about them


Raikom closed, everyone went to the front

Railcar inspector, locksmith on rolling stock repair. A typical safety manual

Railroad for the model

Railroad Tracker, man-made structures and a track mechanic, appointed for inspection. A typical safety manual

Rain from the umbrella

Rain of coins from the air

Rain sensor

Rain Simulator

Rainbow in a light fixture

Rainbow without the sun

Rainwater harvesting

Raise the veil of secrecy

Raising the selected card returned to the deck

Rake from junk items

Ramshchik. A typical safety manual

Range Bandpass Filter

Range filters for HF ranges

Range filters

Range of 160 meters in Radio-76

Range Short-Wave Antenna

Range vibrators


Rapid deployment antenna

Rapid heating of water in the bath

Rare Bird

Raskrizhevschik and the whip marker. A typical safety manual


Raven Slobodka

Ray fell on the crystal

Ray of Light in the Dark Realm

RC generator with capacitive tuning

RCD connection in TN-C and TN-S grounding systems

RDS - signal structure

RDS Signal Receiver

Reaction of division

Reactive car TRUST SSC

Reactive shower

Reactor in the garden

read in the Free Technical LibraryExperts with ammonia

read in the Free Technical LibraryTests of electrical equipment and devices for electrical installations of consumers. Valid values are tg & # 948

Read, smile, and read again, and again without rest writing

Reading a map

Reading Gypsy thoughts

Reading is the best teaching

Reading letters in closed envelopes

Reading thoughts with forced choice

Reading thoughts

Reading thoughts

Real Estate Agent. Job description

Real metal detector capabilities

Real Policy

Real signs of immaterial relations

Reanimating inkjet cartridge

Reanimation of speakers

Reap laurels

Rear fog light relay relay

Reason in spite of, contrary to the elements

Reasonable, kind, eternal

Reasons, nature and characteristics of crime

Rebuilding VHF blocks on FM

Recalculating on the fingers

Receipt of substances into cities

Receiver design

Receiver for centimeter waves

Receiver for walks

Receiver in the infrared link

Receiver in the soap box

Receiver of a personal radio call for the 148... 174 MHz band

Receiver of agricultural products and raw materials. Job description

Receiver of dairy products. Job description

Receiver of materials, semi-finished products and finished products. A typical safety manual

Receiver of the range of 160 meters on SA612A chips

Receiver on the CXA1191S chip

Receiver on the operational amplifier

Receiver without coils

Receiver without power


Receiver-decoder DTMF signals

Receivers for direct conversion of AM and FM signals

Receivers of pulsed infrared radiation

Receiving eight channels on the UPMCT TV

Receiving KB to the detector

Receiving low-power radio stations

Recipes of essences, extracts and tinctures

Recolorable flowers

Recolouring handkerchief

Recommendations for cleaning lasers in CD players

Recommendations for installing car alarms

Recommendations for reducing uneconomical energy consumption

Recommendations for the assembly and operation of solar cells and modules

Recommendations for the preservation of health in wildlife

Recommended list of group equipment

Reconstruction of the Len-M radio station at 29 MHz - FM

Recording inside the egg

Recording music from your computer to a tape recorder

Recording satellite TV at minimal cost

Recording several TV channels

Recovering magnetic tape lines of PL and SL series

Recovery of ferric chloride

Recreating a burned card

Recruiter. Job description

Recruitment by hand. A typical safety manual

Rectangle UB5UG

Rectangular coordinates on maps

Rectangular pulse generator

Rectifier... on the logical element

Rectifier for high currents with small losses

Rectifier for supplying a high-frequency amplifier

Rectifier for supplying a tube-semiconductor transceiver

Rectifier for supplying logic chips

Rectifier for three voltages

Rectifier for two voltages

Rectifier protection device

Rectifier with low ripple level

Rectifier with low ripple level

Rectifier with quotation

Rectifiers with electronic regulator for charging batteries

Rectifiers with electronic regulator for charging car batteries

Rectifiers. How and why?

Rector. Job description

Red and White

Red danger

Red mordant for the horn

Red or Black

Red or green?

Red tannery of sheepskin

Reducer for a snowmobile

Reducing fluctuations in the supply network during welding operations

Reducing the heating of filter parts in processor power circuits

Reducing the heating of transformers of low-power power supplies

Reducing the influence of electric welding machines on the network

Reducing the load on the network during electric heating

Reducing the noise of the magnetic tape track from the SAPP

Reducing the probability of a false alarm

Reducing the ripple of the output voltage

Reef node

Reel Extension

Reference frequency and time signals

Reference Generator

Reference material to chapter 4.2 of the PUE. List of reference normative documents

Refilling inkjet cartridges

Refined sugar

Refining the Celina Transceiver

Refining the configuration of the transformer core

Refining the microcircuit board

Reflectometer for SWR measurements in the frequency range 1-60 MHz. Power 0,001-200 watts

Reflex radio for local reception

Reflex radio

Reflex receiver with low-voltage power supply

Reflexologist. Job description

Reflexotherapy unit


Refractory products refractory. Job description

Refractory. A typical safety manual

Refrigerator door open sensor

Refrigerator door open warning light, 10-15 s

Refrigerator machine

Refrigerator protection relay alarm trigger

Refrigerator temperature regulator


Refrigerators and freezers

Refueler at an automobile gas station. A typical safety manual

Refueler of textile equipment. A typical safety manual

Regeneration mode in the super-regenerative receiver

Regeneration of galvanic cells and batteries

Regeneration of galvanic cells

Regeneration of watch galvanic cells

Regenerative HF receiver

Regenerative KB receiver

Regenerative VHF FM radio

Regenerator in CB and 160 m

Regional Manager. Job description

Regional Studies. Cheat Sheet

Regional Studies. Lecture notes

Regional warehouse logistics. Job description

Regional weekdays


Registration of materials for the investigation of accidents at work and their accounting


Regrouping forces

Regulator for an electric drill

Regulator to bipolar power supply

Regulator-regulator of the speed of the collector motor


Reinforced concrete

Reinforced or shaved

Relaxation fluctuations

Relay control under reduced voltage

Relay controller with temperature compensation

Relay device for monitoring voltage in the electrical network

Relay indicator switch based on the load switch

Relay photo, switching load from lighting, 10-12 volts 120 watts

Relay protection of the household electricity network

Relay protection relay

Relay protection. General requirements

Relay protection. Protection of air and cable lines in 20 and 35 kV networks with insulated neutral

Relay protection. Protection of air and cable lines in 3-10 kV networks with isolated neutral

Relay protection. Protection of generator-transformer blocks

Relay protection. Protection of overhead lines in 110-500 kV networks with effectively grounded neutral

Relay protection. Protection of synchronous expansion joints

Relay protection. Protection of transformers (autotransformers) with a high voltage winding of 3 kV and higher and shunt reactors 500 kV

Relay protection. Protection of turbogenerators working directly on generator buses of generator voltage

Relay protection. Scope of application

Relay protection. Tire protection, protection on the bypass, bus coupler and sectional switches

Relay stabilizer of mains voltage

Relay voltage regulator, 15-22 / 5 volts 10 ampere


Release the genie from the bottle

Release the gum

Release the rope and jacket

Reliable electronic lighter for gas stove

Reliable head protection

Reliable, profitable, convenient!

Relief of the rib

Relocation and stay of employees in the territory of the enterprise, production, laboratory and administrative buildings. A typical safety manual


Remained from the goat's horn and its legs

Remaining money

Remaking a micromotor Rhythm

Remaking a portable radio station of the civilian range

Remaking old power supplies of the AT computer to the ATX

Remaking the washing machine under the weak pressure of water

Remembering the future

Remote antenna indicator

Remote consequences of harmful, traumatic and damaging factors

Remote control - light switch

Remote control device for 12 high-power commands

Remote control for your computer

Remote Control Indicator

Remote control of household equipment on microcircuits TC9148-9150

Remote control of the chandelier

Remote control of the tone control

Remote control of VHF radio

Remote control on infrared rays

Remote control systems for locking / unlocking door locks

Remote control systems for locking / unlocking door locks

Remote Control

Remote engine autorun by mobile phone

Remote Illuminator Status Indicator

Remote lighting control

Remote load management device

Remote measurement of electrical resistance

Remote microphone tangent and headset for portable radio stations

Remote monitoring device for piezoelectric sensors

Remote objects monitoring device

Remote power switch

Remote probe - frequency divider up to 500 MHz for FC250 frequency meter

Remote Probe of the Sound Probe

Remote stop and restart of the counter

Remote switch based on RCD

Remote switching of television programs

Remote temperature control in a country house

Removal of corns

Remove the dent without damaging the metal

Remove the most common spots from the clothing

Removing and installing the wheels of the car. A typical safety manual

Removing excess paint from the roller

Removing paint from an etched board

Removing stains from berries

Removing stains from clothing

Removing stains from grass

Removing the vest from under the jacket

Renaissance AM-FM receiver

Renewable Energy: Progressive Trends or Aggressive PR?

Repair an imported handset

Repair and maintenance of CD-ROM drives

Repair and maintenance of electrical equipment for vehicles. A typical safety manual

Repair and maintenance of machinery and equipment. A typical safety manual

Repair and maintenance of tractors and agricultural machinery. A typical safety manual

Repair and modification of chargers NS-307 and NS-314

Repair and modification of chargers Sonar UZ 205

Repair and testing of oxygen station cylinders. A typical safety manual

Repair of cable lines and installation of cable boxes. A typical safety manual

Repair of imported power transformers

Repair of imported telephones

Repair of LPM of imported radio tape recorders

Repair of radio equipment enclosures

Repair of rubber hand pumps

Repair of switching power supplies. Condenser instead of a lamp

Repair the computer power supply

Repair the slider plate

Repair work on RRS equipment. A typical safety manual

Repairing a water tap

Repairing an electric razor Kharkov

Repairing an energy-saving lamp

Repairing and applying network transformers

Repairing and modernizing a domestic refrigerator

Repairing and upgrading the NOKIA cell phone charger

Repairing and upgrading the SMF-3RDEA fan assembly

Repairing Cordless Phones

Repairing electrical plugs

Repairing energy-saving lamps PHILIPS 6yr ECONOMY

Repairing mirrors

Repairing network transformers

Repairing rubber cushions, balls, etc.

Repairing rubber galoshes

Repairing rubber raincoats

Repairing rubber shoes

Repairing rubber sleeves

Repairing skis on a hike

Repairing televisions with defects in memory chips

Repairing the breaker

Repairing the cable in a radiotelephone, car

Repairing the car stereo SONY XR-2750

Repairing the ceiling - free of dust and dirt

Repairing the Chain saw Ignition Module

Repairing the charger for cell phones

Repairing the charger for the MPEG4 player

Repairing the door frame

Repairing the dynamics of 75GDN-1-4

Repairing the fence

Repairing the Globo GL50 DVB-T2 tuner

Repairing the laptop battery

Repairing the microwave power unit

Repairing the mobile phone charger

Repairing the New Year's Garland

Repairing the Nokia HS-23 headset

Repairing the oscilloscope C1-94

Repairing the power module of the LG 42LM669T-ZC TV

Repairing the Sega Mega Drive-2 IIP

Repairing the side mirror drive

Repairing the switching power supply PC202003040

Repairing the toilet

Repairing the welding machine TAE101U2

Repairing VCRs and Video Players. LMP in SHARP devices

Repeat for me

Repeater - a direction-finding attachment to a 27 MHz radio station

Repetition is the mother of learning

Replacement of doorbell of 220 volt power supply

Replacement of K416KN1 chip and BPI-411 power supply unit in TVs

Replacing an electret microphone

Replacing cylinders with liquefied and dissolved gases. A typical safety manual

Replacing one card with another

Replacing one friction with another

Replacing the battery in a small-sized LED flashlight

Replacing the carbon microphone in your phone

Replacing the carbon microphone

Replacing the CD4060B in an amateur frequency meter

Replacing the IGBT module in the welding machine

Replacing the IGBT module in the welding machine

Replacing the map (six ways)

Replacing the map with wet fingers

Replacing the optotyristor T0125

Replacing the voltage regulator

Reply Loftin-White from Komissarov

Reporting on labor protection

Reptile Press


Requirements for a welding transformer

Requirements for information signs and their installation

Requirements for lighting of rooms and workplaces

Requirements for OSH management

Requirements for storage and transportation of raw materials, finished products and production waste

Requirements for the organization of the workplace

Requirements for the workplace

Rescue and rescue operations at chemical facilities

Rescue both the tractor and the car from corrosion

Rescue buoy for a submarine

Rescuing the drowning is the work of the drowning themselves

Research assistant. Job description

Research electromachines using LEDs

Research of management systems. Lecture notes

Resepshionist. Job description

Resetting a coin from a pinch

Reshaping the Monitor Electronics MC 6106

Reshaping the radio station Len for receiving information from satellites in the 137 MHz band

Reshetnikov Power Amplifier

Resistive noise generator

Resistor soldering iron

Resistors and their application

Resistors with zero resistance and jumpers

Resistors. Code marking by BOURNS

Resistors. Code marking by PHILIPS

Resistors. Code marking

Resistors. Color marking by PHILIPS

Resistors. Color marking

Resistors. Non-standard color coding

Resonance frequency counter

Resonance of pendulums

Resonance waveformer

Resonators piezoelectric

Resources of solar energy

Respect and devotion - devotion and respect

Responsibilities of employees and employers in the field of labor protection

Responsibility of the employee in the field of labor relations and labor protection

Responsibility of the employer for damaging the health of employees

Responsible editor (copywriter). Job description

Rest in Bose

Resting from work (s)

Restless grains

Restoration of audio recordings from magnetic tape and records

Restoration of the jet

Restorer of film copies. Job description

Restoring a Bicycle Tire

Restoring a note

Restoring a torn thread

Restoring an electric drill battery

Restoring and charging the car battery

Restoring and recharging the battery

Restoring faded ink on parchment

Restoring fusible inserts

Restoring permanent magnets

Restoring the AB of radiotelephones

Restoring the backlight of the TFT monitor

Restoring the battery charge

Restoring the cassette recorder

Restoring the cassette

Restoring the efficiency of the Veritas sewing machine pedal

Restoring the multiplier UN9 / 27-1,3 A

Restoring the performance of LED autolamps

Restoring the readability of a CD

Restriction of the charging current of the capacitor of the network rectifier of the ISP

Restrictions on heavy and harmful work

Restrictive and rectifier-limiting diodes


Result of actions on an unknown number

Resurrection of Lazarus

Resuscitation at a stop of blood circulation

Resuscitation when breathing stops


Retired goat drummer

Retractable chassis of the racing model

Retractable glove box for a motorcycle

Retreat to pre-prepared positions

Retro hours

Retro: on a field effect transistor

Return to native Penates

Returning cards

Reuniting pairs

Revaluation of values

Revelation in Thunderstorm and Storm

Reverse bayonet

Reverse control of three-phase electric motor

Reverse for the Drill

Reverse gear

Reverse polarity protection scheme

Reverse-flow switching power supply

Reversible Broadband Cascade

Reversible path in the transceiver

Reversible voltage converter

Reversing AC motors

Review of non-ordinary cooling systems and original computer peripherals

Review of the market of metal detectors and metal detectors

Revitalized glands

Revolution devouring its children

Revolution in action

Revolutionaries in a dressing gown and shoes

Revolutionary keep a step, the indefatigable is not slumbered by the enemy

Rewinding Anchors: An Amateur Experience

Rewinding node

Rewinding yarn

Reworking the RA3AO Transceiver

Rezinomotor aircraft model

RF Current Meter

RF modules with your own hands

RF power indicator on the cable braid

Rheoplethysmograph on transistors


Rhetoric. Cheat Sheet

Rheumatologist. Job description

Rhythmic mind reading

Ribbon bite

Ribbon from a bottle

Ribbon instead of parachute

Ribbon Key

Rice vases

Rich as Croes


Riddle of dark strips

Riddle of the glass cylinder

Riddle of the scarf

Riddle of the torn poster

Riding into someone else's feathers

Riding into the Unknown

Riding the barrel


Right Hand

Right now I'll sing!

Right to work

Rights - do not give, rights - take

Rights and duties of citizens in the field of fire safety

Rights, duties and responsibilities of insurance entities

Ring and rope

Ring and wand

Ring in the box

Ring on a pencil

Ring on the wire

Ring stereo decoder in VHF FM receivers

Rings and Three Swords

Rings are connected and disconnected

Rinsing the bones

Rip off the flowers of pleasure

Rippers for soil cultivation

Ripping off all masks

Rise, shoulder! Swing, hand!

Rising box

Rising box

Rising pencil

Rising rope

Risk as a category of life safety. Acceptable risk

Risk Assessment

Risk factors for teenage drug addiction

Risk Management of Emergencies of a Social Character

Ritual services worker. Job description

RMS voltmeter - attachment to the multimeter

Road first aid kit for a child

Road marking

Road traffic injuries. Warning rules

Road worker on logging roads. A typical safety manual

Road worker. A typical safety manual

Roads that we choose

Roaring beluga

Robbing loot

Robin Hood


Robot on solar cells

Robot Orion



Rocker control cradle

Rocker. A typical safety manual

Rocket 07

Rocketplan S-4-D

Rocketplane of class S4А


Roentgen Wilhelm

Roller Ovens. A typical safety manual

Roller site

Rolling cigarette

Rolling coins

Rolling Coins

Rolling Mill

Roman cucumber

Roman law. Cheat Sheet

Roman law. Lecture notes

Romeo and Juliet

Roofer for roll roofing and roofing of piece materials. A typical safety manual

Roofer of roll roofing and roofing of artificial materials. Job description

Roofer of the soft roof. A typical safety manual

Roofer on steel roofs. A typical safety manual

Roofer. A typical safety manual

Roofing on roll roofing and roofing of artificial materials. Job description

Roofing on steel roofs. Job description

Room Aircraft Model

Room Cleaner. A typical safety manual

Room Cleaner. Job description

Room Fountain

Room Magnetic Antenna

Room Perfumery

Root of Evil

Roots and tubers

Rope - the simple faith

Rope and scarf

Rope Chain

Rose from the Bengal fire

Rose in a glass vase

Rosin varnishes


Ross Ice Shelf

Rotary engine

Rotary machine

Rotating a magic wand

Rotating coin

Rotating door

Rotating egg

Rotating hand

Rotating pack of cigarettes

Rotating Palette

Rotating spiral

Rotating the cane

Rotation changes the form

Rotorua Valley

Rotten Liberalism

Rotten West

Roughly speaking, but to put it mildly

Round numbers always lie

Round robin

Round Table

Royal Couples

Royal Knot


RPE rotor position sensor

RS-232C interface

RS-232-TTL Converter


Rub glasses

Rubanok Struzhok

Rubber Adhesives

Rubber from plants

Rubber laws

Rubber motor model F1G

Rubber note

Rubber putty for glass

Rubber tube repair

Rubber varnish


Rubber-like mass for toys

Rubbermotalschitsa. A typical safety manual

Rubbing a coin into your hand

Rubbing the coin into the eye


Ruby Wagon


Rules and techniques for self-defense

Rules for charging alkaline nickel-cadmium and nickel-metal hydrate batteries

Rules for operating wiring

Rules for protecting electrical networks with voltages above 1000 V

Rules for protecting electrical networks with voltages up to 1000 V

Rules for safe behavior on public transport

Rules for safe driving of a bicycle and a moped

Rules for the installation of electrical installations. General instructions for the installation of electrical installations

Rules for the installation of electrical installations. Scope, definitions

Rules for the issuance of free preventive nutrition

Rules for the use of electrical energy

Rules of behavior and actions of the population in the center of nuclear defeat

Rules of behavior and actions of the population in the territory prone to radioactive contamination

Rules of behavior around reservoirs

Rules of behavior in an autonomous existence in winter

Rules of behavior in ice, with falling snow, icicles and ice from the roofs of houses. A typical safety manual

Rules of behavior in the forest

Rules of behavior on the set

Rules of conduct and ways to protect against riots

Run like rats from a sinking ship


Running a fluorescent lamp without a starter

Running a three-phase motor without phase-shifting devices

Running and starting a 3-phase electric motor in case of phase failure

Running asynchronous motors

Running Buglin

Running engines powered by alternating current of increased frequency

Running fire with 10 LEDs

Running Fruits

Running LED light (option 1)

Running LED light (option 2)

Running LED light (option 3)

Running lights for 10 channels

Running lights on 8 channels

Running lights on a four-phase multivibrator

Running lights on a three-phase multivibrator

Running lights on light-emitting diodes

Running lights with auto-reverse

Running lights

Running line on the microcontroller

Running on waves

Running Ring

Running shortcut

Running simple node

Running switching power supplies

Running threads

Running three-phase motors in single-phase mode

Running ULF by items

Runny nose

Rural windmills and artisanal windmills

Rush hour

Russia - the birthplace of elephants

Russia can only be defeated by Russia

Russia in the dark

Russia is concentrating

Russia, with blood washed up

Russian environmental safety system

Russian grid in the CB radio station

Russian language and culture of speech. Cheat Sheet

Russian language. Cheat Sheet

Russian language. Final tests

Russian literature of the XIX century in a concise statement. Cheat Sheet

Russian literature of the XX century in a concise statement. Cheat Sheet

Russian with the Chinese brothers forever

Rust remover

Rust strength

Rutherford Ernest

Ruwenzori Mountains

RW4LQ Transceiver

RX / TX switch