Yet another XOR feature: a lamp turned on/off with several toggle switches
If you have a room with one lamp and 2-3 (toggle) switches in distant corners,
using XOR function you can make any switch toggle the 'main' lamp:
LAMP = (switch1 XOR switch2) XOR switch3
As I seen in one hotel room with two switches,
one near door, and the second near the bed:
This electric circuit corresponds to LAMP = NOT(switch1 XOR switch2).
(the post first published at 20251110.)
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