| 摘要 |
<p>A vehicle's input switches relating to ignition (20), lights (41) and moisture (44) or rain provide responsive inputs that feed through a digital logic circuit (12) to outputs of an electronic switching device (14) for automatically activating the vehicle's lights (21, 22) and wipers (23). An alarm (24) may be activated if certain input switches are turned on when the ignition is off. The digital logic circuit (12) may be discrete, a programmable read only memory (PROM) or a programmable logic array (PLA). The electronic switching device (14) may constitute a driver circuit (13) and an integrated circuit which includes both a relay switching circuit (K1, K2) and a switched circuit (S1-S4), for exemple a metal-oxide-semiconductor (MOS) driver and a power metal-oxide-semiconductor field-effect-transistor (MOSFET) integrated circuit.</p> |
