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Circuit diagrams for radio amateurs
Antenna
Shortwave antenna
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Other
Display #
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100
All
Articles
Title
Hits
Simple 6-Input Alarm
438
Simple 9-Way Cable Identifier
419
Simple Combination Lock
355
Simple Darkness Activated Alarm
407
Simple Fire Alarm with Thermistor and NE555
396
Simple Infrared Control Extender
431
Simple infrared remote control extender
410
Simple Knock Alarm With Piezo Sensor
433
Simple Lie Detector
396
Simple Remote Control Tester
376
Simple Under-Voltage Cut-Out
514
Simple Universal PIC Programmer
387
Sleeping-Aid
422
Smoke Alarm Battery Life Extender
436
Sonar detector
657
Speaker-Headphone Switch For Computers
494
Speed Alarm For Cars
615
Strobe SDU
746
The Gentle Touch
656
The Millipede
595
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