Russian: Russian version English: English version
Translate it!
Search the Site

+ Search the Archive of technical magazine articles free 10,000 articles!
+ Search the Catalogue
+ Search the Data sheets Archive
+ Search the chassis and models Archive

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

When using materials of the website, link to https://www.diagram.com.ua is a must

created in Ukraine
created in Ukraine

Free online library on electronics

Search the Site

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.

Security devices and alarm systems

Security devices and alarm systems

Security devices and alarm systems. Articles with illustrations and detailed explanations:

A simple laser alarm system

A simple radio alert system

A simple small-sized detector of radio-taps with indication on two LEDs

Acoustic Detector

Acoustic Motion Sensor

Adapter for audible alarm

Alarm channel on the basis of URAL radio station

Alarm device

Alarm device when approaching an object

Alarm signaling device

Alarm system

Alarm with telephone notification

And the watchman, and the illuminator

Anti-Radio Spy

Autonomous security device on infrared rays

Behind the door a tape recorder breezes ...

Calculation of the fire alarm loop

Capacitive key for the security device

Capacitive Relay

Capacitive Sensor

Car security system with satellite tracking coordinates and sending alerts via GSM

Code lock with a numeric keypad

Combination lock (1)

Combination lock (2)

Combination lock on thyristors

Combination lock with alarm

Contactless key

Contactless presence sensor

Detector for searching for radio waves

Detector of radio guts with a logarithmic scale

Device for remote monitoring of the health of piezoelectric sensors

DIY Night Vision

Door Control Device

Door guard

Doppler radar sensor for moving objects DMS-4

Easy Intercom

Economical security sensor

Electric hedgehog

Electronic code lock with four digits

Electronic combination lock

Electronic combination lock with key

Electronic gas sensor

Electronic label

Electronic lock with iButton keys

Electronic lock with iBUTTON tablet management

Electronic security of the village

Electronic Watchman

Electronic watchman on the microcontroller

Encoder and decoder for the alarm channel

Fire alarm systems

For the watchman - a phone call

Gas detector on the GH-312 sensor

Hazardous Gas Alarm

Highly reliable digital lock

Home Alarm

Home alarm system with telephone notification

Home Security System

Infrared Presence Sensor

Integrated security systems

IR communication line in the alarm system

IR listening device


Laser pointer in the alarm system

Len Radio in the alarm system

MICROALARM security system (1)

MICROALARM security system (2)

Microcontroller device of protection

Microwave motion sensor for burglar alarm

Mobile GSM Signaling Device

Multi-channel security and signaling devices

Multi-channel security for remote objects

Multifunction code lock

Multifunctional security system

Negotiating machine

Neighbors guard the apartment

Noise Generator

Passenger night watchman

Photoshop with a pulsating beam

Piezo sensor in the alarm system

Piezosiren in the alarm system

Pocket Siren

Portable alarm device

Prefix - howler

Programmable code lock

Project Forget-me-not

Protect your data!

Protects electricity

Pyroelectric alarm in the security system

Radio Emission Sensor

Radio frequency finder of listening devices (1)

Radio frequency finder of listening devices (2)

Radio remote security device

Radio set for the auto-guard

Radio Watch

Radio Zab. Security system

Radio-detector with a linear scale of eight LEDs

Reducing the probability of false alarms

Remote control systems for locking / unlocking doors

Remote object monitoring device

Security Alarm Device

Security alarm system of yard utility rooms

Security Alarm Transmitter

Security alarms for farmers

Security Device

Security device based on the simulator

Security device for garden plots

Security device Laser stretching

Security device on a subscriber loudspeaker

Security device with a resistor key

Security device with iButton keys and shock sensor

Security device with iButton tablet-key management

Security device with independent power supply

Security Device with Telephone Line Alarms

Security device with telephone line notification

Security of an apartment with telephone line notification (1)

Security of an apartment with telephone line notification (2)

Security Pager

Security system with digital indication

Security systems

Sensors for burglar alarm

Seven-channel dongle

Simple combination lock

Simple security alarm for the village

Simple security devices for the apartment and cottage

Simple watchdog alarm call

Smoke Detector (1)

Smoke Detector (2)

Smoke detector for fire alarm

Smoke detector on phototransistor

Stand-alone security device

Telephone Line Security

The alarm clock of the mushroom picker, it is also the watchdog device

The device signaling the counting

The simplest device to search for radio waves

The simplest watchdog

Three-button code lock

Three-phase watchman

Touch alarm

Touch sensor in the alarm system

Transmitter for Forget-Me-Not

Trap for a thief

Two-channel code lock

Ultrasonic alarm device

Ultrasonic Highway

Universal Alarm

Universal Notification Device

Universal security device (1)

Universal security device (2)

Using network wires as a security alarm loop

Vibrating alarm

Vibration sensor for security device

Voice Relay

Watchdog with a phone call

All articles of the section Security:

Security devices and alarm systems

Security. Audio and video surveillance

Security. Car security and alarm systems

Security. Personal safety