[Rul] built a nice laser trip wire alarm for use in Airsoft matches. Just place the enclosure so that the beam crosses a doorway and it will sound an alarm when the beam is broken. The only problem ...
Little Laser Trip Wire circuit presented here can detect movement of people or objects while passing through the laser beam and trigger security alarms as alert signals to those concerned. What is ...
LAS VEGAS--(BUSINESS WIRE)--NEC Display Solutions of America, a leading global provider of digital cinema projectors, today announced the world’s first digital cinema projector that offers exhibitors ...
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