Active Members Fi8sVrs Posted August 29, 2010 Active Members Report Share Posted August 29, 2010 (edited) A laser alarm system operates by projecting a beam of invisible laser light across a doorway or window opening. When the light is broken, it activates a buzzer or alarm. The principles are very similar to those of more low tech burglar alarms. A laser alarm requires only slightly more sophisticated electronics and can be put together by anyone with a soldering gun and a knack for tinkering with basic circuits and transistors. Sursa: kipkay.com/ Edited June 12, 2017 by Fi8sVrs Quote Link to comment Share on other sites More sharing options...
mike_vio Posted August 30, 2010 Report Share Posted August 30, 2010 Interesant, dar totusi dupa ce o aprinzi cum iesi din camera ? Pe sub ea, tot pe acolo intra si hotul. Daca ii mai pui si o telecomanda, mai bine iti iei una gata care are si acumulatori. Quote Link to comment Share on other sites More sharing options...
yceman Posted August 30, 2010 Report Share Posted August 30, 2010 Interesant, dar totusi dupa ce o aprinzi cum iesi din camera ? Pe sub ea, tot pe acolo intra si hotul. Daca ii mai pui si o telecomanda, mai bine iti iei una gata care are si acumulatori.ideea e ca hotu nu stie de super alarma ta si va trece exact prin raza ... ca de raza e invizibila asta in cazul in care hotu` nu vine fumand ... Quote Link to comment Share on other sites More sharing options...
mike_vio Posted August 31, 2010 Report Share Posted August 31, 2010 Si daca fumeaza, tot il prinde. Particulele din fum, "ceata" obtureaza din fascicul si se declanseaza. Quote Link to comment Share on other sites More sharing options...
