IR MOTION SENSOR ALARM

by BHARATMOHANTY in Circuits > Sensors

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IR MOTION SENSOR ALARM

hi in this tutorial i am going to show you how i made a ir motion sensor alarm.

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this is a simple transistor based circuit here i use two ir led and one ir photo diode.second ir led IS CONNECTED with buzzer parallel through a switch.

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this ir led creates a latch because of it our buzzer continuously on even after object is not available.

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as i mentioned if we want to stop alarm we need to reset it

with this switch.

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here is the circuit diagram for better understanding

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now we can test it. you can watch video to understand how it works.

THANKS