Active Members Fi8sVrs Posted August 29, 2010 Active Members Report 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
mike_vio Posted August 30, 2010 Report 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
yceman Posted August 30, 2010 Report 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
mike_vio Posted August 31, 2010 Report Posted August 31, 2010 Si daca fumeaza, tot il prinde. Particulele din fum, "ceata" obtureaza din fascicul si se declanseaza. Quote