Simple battery backed up, switch released detect circuit Circuit is 3.3V powered and has a battery. We want to detect if the tamper switch is ever released, even when the 3.3V power is off, so that when next powered up the fact that the tamper switch got released at any time can be determined.
Category: Switches
Conductive Rubber Button PCB Pads
An example of gold plated pads from a Fluke multimeter, one of which has a LED which illuminates the button: