Jump to content
Fi8sVrs

How to Make a Laser Alarm

Recommended Posts

  • Active Members
Posted (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 by Fi8sVrs
Posted

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.

Posted
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 ...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



×
×
  • Create New...