Delayed switching circuit for motor vehicle's interior lighting - enables person closing door to predetermine length of time which elapses before light is switched off

摘要

The appts. has a limit switch (1) for the interior lighting system (R), which is closed when the door is open, and open when the door is closed. A three-position selector (2) in its middle position (Y) connects a driver circuit (6) fed from a pulse generator (31) via a controlled counter (32). Brightness and timing data are stored in the memory (41) of a processor (42) via an input switching section (43). The lighting remains on for an interval before being dimmed and extinguished. ADVANTAGE - Delay between issue and implementation of command to switch off can be chosen by user.