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Metal Detector circuit diagram

visits: 102474
Door Alarm circuit diagram
This circuit emits a beep and/or illuminates a LED when someone touches the door-handle from outside. The alarm will sound until the circuit will be switched-off.

author: RED Free Circuit Designs
visits: 48431
Economical Pump Controller circuit diagram

visits: 37376
Everything-that-moves ALARM circuit diagram

author: Thomas Scarborough
visits: 35785
Light switch circuit diagram

author: smartkit
visits: 34993
Fridge door Alarm circuit diagram

author: RED Free Circuit Designs
visits: 34336
Voice activated switch circuit diagram

author: Motorola
visits: 33088
Touch Switch circuit diagram

author: smartkit
visits: 28976
Temperature-controlled Fan circuit diagram

author: RED Free Circuit Designs
visits: 28010
PWM Motor/Light Controller circuit diagram

author: (C) G. Forrest Cook 1999
visits: 24423
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project categories:
folder Audio (49)
folder Power & high voltage (43)
folder Radio (23)
folder Light & LED (31)
folder Tools & measurement (40)
folder Telephone (18)
folder Automotive (10)
folder Microcontrollers (12)
folder Sensors & control (47)
folder Timers & oscillators (40)
folder Miscellaneous (26)

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project subcategories:
All subcategories
light controlled
temperature controlled
moisture controlled
sound controlled

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