![]() For this project i only ring the buzzer when ever their is intrusion and pir sensor out pin goes high. External controller can also generate other notifications such as text sms on a mobile number, internet email notifications etc. This change in out pin voltage can be read by external controller and an alarm can be rung to notify the owner about intrusion/presence. When ever infrared radiation is detected by the pir sensor out pin goes high. Out pin is the alert pin, normally it remains low when no infrared source is in pir range. We connect input power +ve lead to Vcc and negative to Gnd. Hscr501 requires 3.3 v to 5 v for its operation. You can find many tutorials on internet about interfacing hcsr501 with different microcontrollers(arduino, pic, msp430 etc). ![]() For this project i selected Hcsr501 pir detector.
0 Comments
Leave a Reply. |