Automatic time switch for staircase lighting has a mains alternating voltage feed to a filter network/rectifier circuit feeding a timer circuit

摘要

By determining a switching time, a timer's signal triggers an all-or-nothing relay (4), whose working contact (40) bridges one of the mains voltage wires (L,N) with a wire (5) feeding staircase lighting for supplying staircase lights (50) externally. Activated externally by button switches (60), button signal wires (6) each link to a mains voltage wire.