Search This Blog

Monday, 2 November 2015

PIR HUMAN SENSOR WITH BUZZER ALARM

YOU CAN MAKE YOUR OWN
HOME MADE PROJECT
CIRCUIT DIAGRAM OF PIR SENSOR RELAY DRIVING CKT
IMAGE OF PARTS MOUNTED PBC

Here 7812 for regulating for 12v dc from source voltage. Then supply to pir sesor ( which detect human motivity ) . Sensor has 3 terminal +B , GND, O/P . The O/P voltage  is 3.3v . The 3.3v is given to transistor base trough a resistor 2K7 ohems . Transistor emitter is GND. The collector of Transistor is connect to relay and another point of relay gets 12v from ckt.
  So when sensor see a Human activity  he out 3.3v and transistor get  on the relay.
You can use this so many purpose like automatic door open close, Alarm, or many more.

In this sensor have two preset first is distance adjustment and second is delay time adjustment
If any other query you can comment...................

PIR SENSOR FOR HUMAN DETECTION
PIR MOTION SENSOR CIRCUIT
PIR MOTION SENSOR MOTOR DRIVING CIRCUIT
PIR MOTION SENSOR RELAY SWITCHING CIRCUIT
PIR MOTION SENSOR SINGLE TRANSISTOR SWITCHING