A lawn care device may include an engine to selectively power the lawn care device, a frame supporting the engine of the lawn care device, and an ignition interface having a processor therein to enable selective powering of the lawn care device based at least in part on operation of the ignition interface. The ignition interface may include a switch monitoring assembly configured to enable the processor to monitor status of a plurality of switches associated with respective components of the lawn care device. The switch monitoring assembly may be further configured to enable the processor to monitor opposing statuses (330, 332 or 324, 326) of at least one of the switches.