Pir Sensor Alarm Circuit Diagram. The pir sensor is the heart of the project. Along with this biss0001 micro power pir motion detector ic some resistors capacitors and other components used to build pir sensor biss0001 ic take the input from sensor and does processing to make the output pin high or low accordingly.
D204b pir sensor is used in this. Pin 1 is vcc which is connected positive 5v supply. Pir sensor security system circuit diagram pir sensor based security system.
When the pir sensor detects any human body movement its output pin becomes high vcc and when it does not detect any human body movement its output pin becomes low ground here the bc547 transistor work as a switch.
So lets begin our project. Go through the given diagram of the pir sensor to understand its pin outs and arrangement in the circuit. So um3561 activated and start producing sound with speaker. We can design the project in such a manner that as soon as the burglar or intruder walks past the sensor the alarms would turn on and the whole lighting system could turn on.
