2. 7/15/2019 Motion Sensor Light switch
https://www.printfriendly.com/p/g/viXxTS 2/4
5 Diode 1N 4007 1
6 PIR sensor 3.3 to 20V DC input 1
7 Bulb AC bulb or DC bulb can be used 1
8 BCB Your can use it without PCB 1
All living things (human or animals), whose body temperature is more than 0 degree Centigrade ,
emit the heat in form of infrared radiation through their body, also called as thermal radiations. This
Radiated energy is invisible to human eye. These heat Signals can be detected by using PIR sensor
which is specially designed for such purpose.
This is a motion detector sensor which detects movement of human beings and triggers its output to
High state (low or high). It operates in two modes low and high. The mode is selected by the jumper
provided on the rear side of the PIR sensor PCB that is shown on figure given below. If sensor with
input voltage capability of 12V is not in your reach, use LM 7805/7806 regulator to control the 12v
current if you give 12v current directly the sensor may be damaged.
Modes of PIR sensor