hai my name is deepika. i want electronic watch dog semnar ppt & documentation

seminar on electronic watchdog

ABSTRACT

Electronic watchdog is used for your house that sounds to inform you that somebody is at gate or passing through it. The circuit comprises of a transmitter unit and receiver units, which are mounted face to face on the opposite pillars of the gate or door such that the IR beam transmitted through IR LED1 of the transmitter, get interrupted when someone is standing at the gate or passing through it. - Here’s an electronic watchdog for your house that sounds to inform you that somebody is at the gate. The circuit comprises a transmitter unit and a receiver unit, which are mounted face to face on the opposite pillars of the gate such that the IR beam gets interrupted when someone is standing at the gate or passing through it. The transmitter circuit is built around timer NE555 (IC1), which is wired as an astable multivibrator producing a frequency of about 38 kHz. The infrared (IR) beam is transmitted through IR LED1.dpuf