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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
Clocks, timers, relays, load switches
Clocks, timers, relays, load switches
Display #
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Articles
Title
Hits
1KHz Sinewave Generator
698
24 Hour Timer
663
24 Second Shot Clock
631
28 LED Clock Timer
647
5 to 30 Minute Timer
619
555 Timer Circuit With Variable On/Off Times
690
A Bedside Lamp Timer Circuit Schematic
655
A Tan Timer Circuit Diagram
625
A timer with a 24-hour cycle
856
A Very Useful Timed Beeper Circuit Schematic
656
Acoustic machine
844
Acoustic relay
1666
Acoustic relay FET
886
Acoustic relay, switching the load from cotton, 10-12 volts 120 watts
754
Acoustic switch
936
Acoustic switch four loads and automatic lighting effects
907
Adjustable High/Low Frequency Sine wave generator
622
Alarm Clock With Day Selector
640
Amplifier Timer
577
Amplifier Timer Circuit Schematic
702
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