Delay circuit for inside lighting of vehicle - has switches responsive to door position and handle operation to connect RC circuit to supply

摘要

The delay circuit has an RC circuit coupled to the base of a switching transistor that controls the relay that turns the lights on and off inside the vehicle. Each door switch is closed when its door is open. The RC circuit is influenced by the door-handle switches in addition to the door switches. The RC circuit (C2,R5,R6) is connected directly to one pole (+) of the vehicle's supply network (30) and via a switch (T2) to the other pole (-). The switch is connected to the door switch (TK) and to the door-handle switch (TG) such that it is closed when the door-handle switch is closed.