Car security systems in recent years are undoubtedly distinguished by their high efficiency and reliability. Nevertheless, it is possible to insure yourself additionally against intruders with the help of GSM signaling. This system, depending on the functionality, will be able to notify you both about trying to get into the garage, and directly into the car. If you decide to install such a system, you need to decide whether to buy a ready-made device or assemble it yourself. The finished version already has a certain set of functions, it requires only installation and connection. The minus is its high cost.

Content

• 1 The principle of the system
• 2 The main advantages of hand-made GSM alarm system
• 3 Functionality
• 4 Assembly Instructions
• 5 Instead of afterword

The principle of the system

Mounting the alarm in the car, we connect the phone to the on-board power network of the car

The simplest GSM alarm system for a car can even show its effectiveness, even if it was made personally for a couple of hours. The main element of such a security system is a mobile phone. With its help, the search for a car is greatly simplified if the hijacking has occurred. The system works quite simply - notification of an attempt to break into and enter a car occurs by sending an SMS message or calling a phone number that was entered into the program. From the owner, in turn, requires only competent and timely response to the incoming signal of danger.

The main advantages of hand-made GSM alarm system

The elements required to assemble the system are quite cheap. Their total cost will be no more than one and a half thousand rubles. It is enough just to install it, this will require minimal basic skills of working with a soldering iron. Properly assembled GSM alarm system with their own hands will not be inferior in quality to many factory analogues, and its installation will take only a few hours. In addition, thanks to the battery in a mobile phone, such an alarm can continue to work for some time without a power source (up to several days).

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Functionality

The set of functions depends on the complexity of the chosen scheme, as well as on the skills of its collector. It may include:

1. Information on detected faults of the car.
2. The ability to control the system in the entire range of the mobile network signal.
3. Lock the main components of the machine.
4. Execution of various commands, including engine start.

Below are instructions for assembling such an alarm. It should be noted that it can not be called a super device, but it still can provide additional security for your car. The key element of the whole structure is an old (but working!) Mobile phone.

Assembly Instructions

Having access to the phone's button board, we solder two wires to the button, which is responsible for speed dialing your number.

1. First you need to set your mobile phone number for quick dialing.
2. After turn off the phone and disassemble it. It is necessary to provide access to the contact pad of the keyboard. Next, solder the two wires as indicated in the photo. Wires must be brought out. After you need to carefully assemble the mobile device.
3. The received contacts will be closed due to the relay, the operation of which will occur simultaneously with the activation of the siren installed in the car alarm system. It is necessary to connect a relay to it.
4. To prevent the system from triggering when the machine is set in an armed mode, the system needs a small delay. For this we use a time relay.
5. The mobile phone will be powered by a charger, which should be connected directly to the vehicle electrical system.
6. When the siren is triggered, power will be supplied from its wire to the time relay. Next - the set delay, after which the relay is activated, which closes the contacts on the keypad and the phone dials the number to the previously specified number.

Instead of persistence

That's all. Now you know that making a GSM alarm system with your own hands is not a hard task. And to perform such an upgrade of your car under the force of almost every car owner. In addition, self-assembled GSM alarm system for a car will cost you a much smaller amount. Therefore, if you have a minimum stock of knowledge in electronics, a few free hours, as well as a thousand rubles, it is better to do everything yourself.

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