Introduction: IR MOTION SENSOR ALARM
hi in this tutorial i am going to show you how i made a ir motion sensor alarm.
Step 1:
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.
Step 2:
this ir led creates a latch because of it our buzzer continuously on even after object is not available.
Step 3:
as i mentioned if we want to stop alarm we need to reset it
with this switch.
Step 4:
here is the circuit diagram for better understanding
Step 5:
now we can test it. you can watch video to understand how it works.
THANKS