Making Sense of the End of the Line Resistor
If you've ever popped open a security system or a fire alarm panel, you probably noticed a tiny, striped end of the line resistor tucked away near the sensors or terminal blocks. It looks like a minor detail—something you could easily overlook or forget—but it's actually one of the most critical parts of the entire setup. Without these little guys, your high-tech security system isn't much more than a fancy doorbell that doesn't know when someone has cut the wires. ...