I'm having hard time finding ideal PIR sensor for my project. I need small PIR sensor that works reliable. It doens't have to be very sensitive, but I don't want false alarming.
Currently I tried:
- HC-SR501 - it works great but it is huge
- HC-SR505 - it is smaller but still large for my project
- AM312 - it is small but gives false alarms
First of these two PIRs are pretty large because I want to make just one small custom board and have only PIR element soldered on it. If I use PIR elements like D203S or RE200B I need to have detection circuit and that uses additional space on my board.
AM312 looks great because it has detection circuit built into PIR element. It only requires 3V and outputs 3V if motion is detected. That is great but looks like I'm having some false alarming with this sensor. I'm looking for similar sensor but more reliable, any idea?