So I'm wondering if you've had any luck with your project. Have you been able to locate the output pin from the final stage of the amplifier? Hopefully, you're on your way to using this motion sensor for your own purpose. I look forward to hearing about it.
Hello flyboy, thanks for the response!
Sorry it took me a while to get back to you, I hadn't checked this post for a while, figuring it was dead :/
I ended up just pulling the IR sensor off the board and taking a good look at it. I found the same part online, and have been able to identify the pins.
The OpAmp chip on the back of the board is SMD, and I don't have the capability to use that yet, though I have it saved for when I can use SMD parts, as I fully plan to learn how to use them
I have some through hole OpAmps I can use, and might just try and design my own circuit around this IR sensor and see if I can't put it to use, though that is more on the back shelf right now.
After a bit more investigation on the board this came off of, the additional two wires I assumed were data lines ended up both being for the reed switch. I am guessing one is to latch it on when the IR sensor detects motion, and the other to release it when there is no motion detected?
I have worked with reed switches quite a bit making brush-less motors and really don't know where there would be two wires to operate the reed switch, but they were both labeled under the screw terminals, so this is as near as I can figure the wires were used for. The processor on the main board in the basement might have had a latching output which needed a separate signal to turn it off? Don't really know, but I also pulled the reed switch off the board and have it saved also, which is nice, because all the other ones I have have burned out in HV experiments I have run in the past. (pulsing power through a Ford Model T ignition coil at high frequency will kill a reed switch in a hurry, if anyone was wondering
If nothing else, I got a handful of useful parts off the board, which is always nice to find free components around the house in the junk we don't use anymore!
Thanks for the advice, you have pointed me in the right direction for figuring out how to wire up this IR sensor when I get around to designing a project that would use one!