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Circuit diagrams for radio amateurs
Antenna
Shortwave antenna
Antenna amplifiers
Television aerials
VHF antenna
Audio
Auto electronics
Batteries, chargers
Electric car scheme
Electronic devices
Electronic fuel injection
Ignition system
Security devices and alarm
Speedometers and tachometers
Power supplies
Radio transmitters
Telefonie
Consumer electronics
Bells and audio simulators
Clocks, timers, relays, load switches
House, garden land, hobby
Indicators, detectors
Metal detectors
Power controllers, thermometers, heat
Other
Field strength detector
Medicine
Lighting
Wireless microphones
Television and video
Nodes of radio engineering
Generators, heterodynes
Quartz filters
Modulators
The signal limiter, compressor
Mixers, frequency converters
Filters and matching devices
Other
Main
Consumer electronics
Other
Other
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Articles
Title
Hits
12 Stage Water Level Indicator
855
7 Segment LED Counter
775
70W OCL Power Amplifier
846
A voltage regulator of the bike lights
844
Active High Pass Filter Using LM741
655
Anti-Theft Security For Car Audios
698
Automatic Mains Disconnect
780
Automatic Switch-Off Staircase Light
752
AVR Dongle
866
Beam-break Detector For Camera Shutter or Flash Control
699
Bell Alarm
893
Bike speedometer
860
Broken Charger Connection Alarm Circuit
749
Car Alarm Simulator
1010
Car Audio System Anti Theft Security
699
Car Headlight Alarm
679
Case Modding
618
Cat And Dog Repellent
800
CD-Rom Drive as Digital-Audio CD Player
706
Cheap Motorcycle Alarm
919
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