[b] [/b]Hi am sony i would like to get details on seminar report on electronic watchdog ..My friend Justin said seminar report on electronic watchdog will be available here and now i am living at ......... and i last studied in the college/school ......... and now am doing ....i need help on ......etc
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Electronic watchdog
Here is an electronic watchdog for your house that rings to inform you that someone is at the door. The circuit comprises a transmitting unit and a receiving unit, which are mounted face-to-face on opposite pillars of the gate so that the IR beam is interrupted when someone stands at the gate or passes through it. The transmitter circuit (see Fig. 1) is built around timer NE555 (IC1), which is wired as an astable multivibrator that produces a frequency of approximately 38 kHz. The infrared beam (IR) is transmitted through the IR LED1.