alarm system in house

safety alarm system

Motion Sensors: It’s the most essential and common form of protection. Passive infrared sensors: Detect motion by sensing a sudden change in heat. Dual Tech motion detectors use two different technologies in the same unit: passive infrared and microwave. These devices are designed to avoid false alarms since both technologies must detect motion before setting off the alarm. Photoelectric Sensors: These sensors project a beam of light across a hall or doorway to detect motion and are triggered when a person passing through interrupts the beam. Glass Break Detectors: Usually mounted near windows to detect the specific high frequency sound of glass being shattered. They are usually installed on a wall opposite or adjacent to the protected glass and are effective within about 15′ to 25′. Smoke and Heat Detectors: Detect smoke and heat. Chapter II:Our Home Alarm SystemOur Home Alarm System:Our project’s main concern was to build a Home Alarm System using a PIC microcontroller. We started off our project by coding the Keypad, then LCD and the final touch was the sensor. We also added two types of buzzers: one to sound the alarm and the other as a key tone buzzer.

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The first thing you need to do is position the camera where you intend to keep it. It’s a good idea to start the motion detection at a low setting on your smart phone. All you have to do then is walk in front of the camera and check to see if the device’s LED comes on. If not, increase the motion detection setting and try again. Continue like this until the LED flashes. That’s it. The camera has detected your motion so you can set save the settings right there. You may have to play around with the motion sensitivity a bit until you find your optimal setting. It’s better to have your camera point toward a solid background, away from windows. The problem with cameras that can see through glass is that they might pick up plants moving around on a blustery day, or passing vehicles even. Again, if you want to detect motion at a first floor window, then place the camera to one side, not opposite it.