Hi, looking for the right way to hook up existing sensors from an old security system.
An example of one of the door sensors is located here (gri-180-12):
When it comes to the Internal pull-up resistor, are there any limitations? For example if I have 8 sensors can it still be used ?
If it's more reliable or needed with multiple sensors/zones can someone give me the ideal resistors/size for this? I've heard using a 10k resistor, but would that still work if it's attached to a single zone of say 4 sensors?
I tried searching but only find examples for a single sensor so just want to make sure i'm not missing anything.