24-09-2010, 11:42 AM
[attachment=4251]
presented by :-
S.K. Kirar
ELECTRONIC EYE WITH DIAL-UP
abstract
Circuit of an Electronic eye based on infra-red Transmitter and Receiver presented here is not affected by either sunlight or other artificial light sources.The Circuit makes use of modulated infra-red light beam which is invisible to the naked eye. As long as the path of infra-red modulated beam between transmitter and receiver is not interrupted by an intruder or object, the local area alarm and telephone dialer section do not operate. Once the path of the infra-red beam gets interrupted due to any objec or intruder the alarm starts sounding and the telephone dialer circuit gives the alarming message through the telephone line to the concern person whose number has already been stored.
