Hello my friends in this video i show you how to make alarm from your old mobile phone. I think everyone of us have old mobile phone with keyboard :) if it can't find in your home you can ask yours friends.You can protect your house or other building or you can leave in your car. In this way you can protect where are you go you will receive call if sensor detect movement and presence from humans and animals. Mobile phone make call when sensor detect movement and presence, so therefore we connect one wire from call button to positive wire from battery and another to signal from sensor.
When it receive call button signal from sensor will make short contact and than will dial the number we set for calling :) I make this video step by step to make everyone, you need a little knowledge from electronics and you will make your alarm.
Another important thing that is you need PIR motion sensor. To activate call button when detect movement and presence.
More about PIR(Pyroelectric infrared) Motion Sensor
The PIR Sensor module allows you to sense motion. It is almost always used to detect the motion of a human body within the sensor's range. It is often referred to used "PIR", "Pyroelectric", "Passive Infrared" and "IR Motion" sensor. The module has an on-board pyroelectric sensor, conditioning circuitry and a domb shaped Fresnel lens.
A (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.
All objects with a temperature above absolute zero emit heat energy in the form of radiation. Usually this radiation isn't visible to the human eye because it radiates at infrared wavelengths, but it can be detected by electronic devices designed for such a purpose.
The term passive in this instance refers to the fact that PIR devices do not generate or radiate energy for detection purposes. They work entirely by detecting infrared radiation emitted by or reflected from objects. They do not detect or measure "heat".
An individual PIR sensor detects changes in the amount of infrared radiation impinging upon it, which varies depending on the temperature and surface characteristics of the objects in front of the sensor. When an object, such as a human, passes in front of the background, such as a wall, the temperature at that point in the sensor's field of view will rise from room temperature to body temperature, and then back again. The sensor converts the resulting change in the incoming infrared radiation into a change in the output voltage, and this triggers the detection. Objects of similar temperature but different surface characteristics may also have a different infrared emission pattern, and thus moving them with respect to the background may trigger the detector as well.
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Materials that you need:
1. Old mobile phone with keyboard
2. Two wires with 20 cm length
3. PIR (Pyroelectric infrared) Motion Sensor(working voltage 5-20)(You can get here on amazon for 2 $ US)
www.amazon.com/TOMTOP-Pyroele...
218&keywords=pir+motion+sensor
4. Connector with 3 pins i use from old pc cpu fan
5. Battery 9 volts
6. Battery connector for 9 volts
7. Plastic Box
8. Switch
Tools that you need:
1. Pliers
2. Sealing tape
3. Screws
4. Soldering iron
5. Glue
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