SecuringRoof

Category:Sasecurity
=== Criminals get in through the roof ===
Place 50m InfraRedLeds on the gutters. Upto 10 closely spaced beams must exented horizontally away from the roof.
To prevent false alarms from birds a certain number of beams must be broken within a set timeframe. The InfraRedLeds are linked to the RS485/["RS485"] circuit.