4 channel Telemetry System
4 channel Telemetry System circuit

4 in 1 Burglar Alarm
4 in 1 Burglar Alarm circuit

A simple electronic buzzer
A simple electronic buzzer circuit

Beeper
Beeper circuit

Big Ben Sound
Big Ben Sound circuit

Brakelight Flasher
Brakelight Flasher circuit

Capacitive Sensor
Capacitive Sensor circuit

Car anti theft wireless alarm
Car anti theft wireless alarm circuit

Color Sensor
Color Sensor circuit

Combination Lock
Combination Lock circuit

DayLight Alarm
DayLight Alarm circuit

Dew sensor
Dew sensor circuit

Digital Remote Thermometer
Digital Remote Thermometer circuit

Door Alarm
Door Alarm circuit

Electronic detector of air flow
Electronic detector of air flow circuit

Electronic Lock
Electronic Lock circuit

Electronics Telephone Talking Circuit
Electronics Telephone Talking Circuit circuit

Emergency Light & Alarm
Emergency Light & Alarm circuit

Factory Siren
Factory Siren circuit

Field-strength meter
Field-strength meter circuit

Fire Alarm
Fire Alarm circuit

Fridge door Alarm
Fridge door Alarm circuit

Frost Alarm
Frost Alarm circuit

Heating System Thermostat
Heating System Thermostat circuit

Infra-red Level Detector
Infra-red Level Detector circuit

Infrared Alarm
Infrared Alarm circuit

Infrared beam barrier/ proximity sensor
Infrared beam barrier/ proximity sensor circuit

Infrared emitter and infrared Reciever
Infrared emitter and infrared Reciever circuit

IR Remote Control Extender Circuit
IR Remote Control Extender Circuit circuit

IR transceiver 1.0
IR transceiver 1.0 circuit

Light Barrier Detector
Light Barrier Detector circuit

Light switch
Light switch circuit

Light/Dark Detector
Light/Dark Detector circuit

Live-line Detector
Live-line Detector circuit

Low Voltage Alarm
Low Voltage Alarm circuit

Magnetic proximity sensors
Magnetic proximity sensors circuit

Mains Remote-Alert
Mains Remote-Alert circuit

Melody generator for greeting cards
Melody generator for greeting cards circuit

Metal Detector
Metal Detector circuit

Metal Detector
Metal Detector circuit

Police Siren
Police Siren circuit

Power supply failure alarm
Power supply failure alarm circuit

Proximity Alarm
Proximity Alarm circuit

Rain Alarm
Rain Alarm circuit

Remote Doorbell Warning Switch
Remote Doorbell Warning Switch circuit

Room Noise Detector
Room Noise Detector circuit

Sound Operated Switch
Sound Operated Switch circuit

Temperature Sensor with Digital Output
Temperature Sensor with Digital Output circuit

Theft preventer alarm
Theft preventer alarm circuit

Touch Switch II
Touch Switch II circuit

Tough switch
Tough switch circuit

Ultra-simple Voltage Probe
Ultra-simple Voltage Probe circuit

UltraSonic Radar
UltraSonic Radar circuit

Ultrasonic switch
Ultrasonic switch circuit

Voice activated switch
Voice activated switch circuit

Water Level Indicator with alarm
Water Level Indicator with alarm circuit