PIR Motion Sensor project.
The PIR Sensor used in this project was designed for another wireless Alarm system. I had to use this part of the system because, PIR sensor/circuits are not easily available at my area.
The problem is, how can i evade the timer which triggers a logic high output that is timed and goes high after every 2 hours.
I have short wired the high output and ground to a cell phone dial button, which subsiquently dials a pre-set number on a high signal.
All is well, when the sensor senses sudden heat motion, it triggers the circuit, i get a call. But it also gives me a call after every 2 hours, on accurate intervals.
It would really help if i could know which component compels the 2 hour timer, and how i could evade it, so that the security sytem would only give me a call on actual motion triggers.
Above are diagrams on the circuit. Your advice will be appreciated. Thanks.