neba3939 Posted March 19, 2012 Report Share Posted March 19, 2012 Hi guys, i am a first year college student and this is my first project to build by myself.. and i need help.I build this laser alarm system and it works good. the Alarm sounds when the laser is broken and it stops when the laser is not interrupted. But the problem is when the laser is disturbed the alarm sounds but as soon as the laser touches the photocell again the alarm stops.. i was thinking, is there any way to make the alarm sound constantly non stop ones the laser is broken, Is it possible to make the alarm sound continuously without non stop unless it is stopped manually? Please look at the schematics and help me.. thank you Quote Link to comment Share on other sites More sharing options...
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