Hello, I'm having a lot of trouble with PIR sensors. I don't know if I need to pull up or pull down on the input pin. I don't really understand what "open collector" means. I'm just reading the input pin right now and it's always high. I'm using the default "button" sample sketch.

Pull up? Pull down? Float?

Topic		Replies	Views
SENSORE PIR Generale	6	2781	May 7, 2021
PIR normally open Sensors	2	844	May 6, 2021
This possible with PIR? General Guidance	3	1371	May 5, 2021
Open Collector - Input digital signal General Electronics	7	7490	May 6, 2021
PIR Sensor Sensors	6	2766	May 6, 2021