I have a generic PIR sensor which works seamlessly for some months but after that, it starts detecting motion when there is no motion at all. I have set the pir sensor to continuous detection mode, on full sensitivity and time delay of 30 second.
What is the component that get gets damaged over time in the pir sensor? I want to replace that component if possible instead of just replacing the whole sensor.
Spandan
Adafruit shows an example the raw sensor here:
I have one powered by a 9V rechargeable battery. It has the same behavior when the battery is low.
How are you energizing yours?
I am powering it by a 5v 1A power supply. Now it shows false detection after every 1 hour of continuous power, and repeatedly gives on and off signal after that.
Is there an Arduino involved?
If so, can you remove the Arduino and test the PIR on it's own.
Power the PIR with that 5volt supply, and attach a red LED between it's output and ground.
(no resistor needed, because the PIR already has one).
Note that strong RF signals nearby and warm/cold air turbulence can also set it off.
Full sensitivity is not recommended. Leave the pot how you got it, in the middle.
(it does not adjust sensitivity, but delay time before firing)
The time pot can be adjusted to your needs.
Leo..
No
Did that as well, same result.
No RF signals nearby is there, and it is there in an indoor area without fan. So no air turbulence is there.
The thing is my requirement is full sensitivity and i can't set it to default. The default sensitivity is much low and it works like a charm in the full sensitivity couple of months ago.
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