Hello friends, Kedar is here! today in this video we will make a simple door security alarm using a razor blade as a sensor , a buzzer and a 3v coin cell battery. This is good electronic project for school. I installed this alarm onto my homes door but you can install it pretty much at any place like gate door , closet door , garden door , office door and setup very quickly as this alarm is really simple to make, it uses household parts like razor blade ,coin-cell battery (CR2032), 3v buzzer. so keep your thief away from your office , business and homes with this simple DIY electronics project door alarm systems.

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1) Razor Blades : [ Ссылка ]
2) Buzzer 3V: [ Ссылка ]
3) Battery Holder CR2032: [ Ссылка ]
4) CR2032 Batteries: [ Ссылка ]
5) Soldering Iron: [ Ссылка ]

Timestamp
00:00 Testing
00:08 Take A Razor Blade
00:19 Unsharpen The Razor Blade Edges
00:40 Break It Into Two Pieces
00:52 Strip Wire
00:54 Solder Wire to Razor Blade
01:12 Coin Cell Holder
01:20 Solder It with Coin Cell Holder
01:35 Solder A Switch and Buzzer
02:23 Install On a Door
02:56 Test Yourself


Electronicsforu: [ Ссылка ]

How Does a Door/Window Alarm Sensor Actually Work?
A door and window alarm sensor works by using a sensor and a magnet. The sensor is placed on or inside the door or window frame. The magnet is placed on or inside the door or window itself. When the door or window is opened, the magnet will separate from the sensor, causing it to activate.
As soon as the magnet separates from the sensor, an internal reed switch inside the sensor will become tripped. When this happens, the sensor will send a signal to the alarm system. The system will then perform a predetermined action based on the Response Type for the sensor. This could include requiring a system disarm or activating a siren.

What is door sensor?
A door contact sensor is a peripheral security sensor that lets an alarm system know whether a door is opened or closed. When a door is opened, the sensor will activate and let the system know about the situation. The system will then respond based on the programming settings for that zone

This video answers to the following questions
door sensor that sends text message

sliding door alarm sensor
door alarm to phone
entry door sensor
door open sensor
door sensor wifi
door sensor chime
door contact sensor

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# Music Credit
Tobu-Hope [NCS Release]

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