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Detector, Indicator & Sensor Circuits
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C = Circuit / Schematic
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Hot Water Level Indicator
C
Negative Ion Detector
C
Frost Alarm
C
Dark Activated Switch
C
Sound Operated Switch
C
Water Activated Relay
C
Temperature Controlled Relays
C
A Thermostat With Adjustable Hysteresis
C
Pot plant water tester
C
Water and Moisture Activated Alarm
C
Dew sensor
C
Rain Alarms and Detectors
C
C
C
Fire Alarms
C
Lightning Detectors
C
Electromagnetic Field Detectors
C
Metal Detectors
C
C
C
Surveillance Transmitter Detector
C
Beat Balance Metal Detector
C
Coil Coupled Operation Metal Detector
C
Human Body Detectors - Radio Wave Alarm
C
Snore Alarms
C
Contactless Mains Voltage Indicators
C
Light Detectors
C
C
C
Air Flow Detector
C
Electronic Stethoscope (Pulse and noise Detector)
C
Water Level Indicators
C
C
Temperature Monitors
C
Magnetic proximity sensors
C
Color Sensors
C
Touch Switch Sensors
C
Doorbell for the Deaf
C
Sound (Hand Clap) Activated Circuit (advanced)
C
Sound (Hand Clap) Activated Circuit (simple)
C
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Useful Links
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R=Reference   C=Circuit/Schematic   
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Electricity & Electronics Inventions and Discoveries
R
Electrical Engineering Free Theses, Dissertations & Patents
R
Electronics Tutorials, Circuits and Resources
R
Electricity Basics
R
Electrical Safety
R
R
Electronics Projects Books
    
    
    
        
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