A simple system using multiple motion sensors and a light sensor to activate stairway lighting at night - and avoid the problem of lights turning out when you're chatting on the landing ;-)

Do you have a large staircase with many floors? This might help you out.


The code is written to be self-explanatory rather than super efficient.


All you need are some cheap components like PIR sensors,  a relay and a light sensor and you're off!


The actual components I used were :

Light sensor -


PIR sensors -


Relay -



Good luck!