1. Fotronichs, #102 ginnumudaliar street virupackchipuram, vellore-632002,ph:9791899533
ABSTRACT
The main scope of this project is to sense the presence of human begin in the locked
home. When identified the human presence using the PIR sensor then the alarm will ring
using the comparator input.
Keyword: PIR sensor, comparator, relay
BLOCK DIAGRAM
POWER SUPPLY
COMPARATOR
PIR SENSOR
RELAY
REFERENCE
VOLTAGE
BUZZER
2. Fotronichs, #102 ginnumudaliar street virupackchipuram, vellore-632002,ph:9791899533
CIRCUIT DIAGRAM
HARDWARE REQUIREMENTS
1. POWER SUPPLY
2. PIR SENSOR
3. LM324 COMPARATOR
4.6V RELAY
5. BUZZER
