Home Security System using LDR
Description:-
in this figure you have seen the home security system using LDR. After making this circuit flowed the torch ray on the LDR if you have break the ray of light the base of the transister Q1 is positive so this time the transister is off. After that the pin no. two of the integrated circuit U1 is negative so the integrated circuit U1 will be triggred and the output will be ON. when who don't break the torch ray. this time the base of transister is negative so the pin no. 2 of the integrated circuit U1 is positive. So this time the inegrated circuit U1 will be OFF, Assemble this circuit on Good Quality PCB or Dott Matrix Board
Part List:-
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ReplyDeleteCan LS1 be replaced by a buzzer?
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