The remote theft alarm device of the 12th grade student

The homestay life often happens with theft, at times like that, Tuyen often thinks "if only I have a burglar device, that's good". Gradually, the love for physics is also growing, Tuyen decided to research to make a burglar device for her.

From the 10th grade, Nguyen Thi Kim Tuyen (class 12K, high school specializing in Tien Giang) had to live away from home, set up everything. Tuyen said, living away from boarding houses, all personal belongings and assets must be really vigilant and upheld. Moreover, life in student dormitories, students often occur theft, such times Tuyen often thinks "if only I have a burglar device, that's good".

"Then while studying, the physics teacher at the school was also popular with the whole class about the science and technology creative competition for children and teenagers. So I started to cherish the intention to study as a What is so useful, I see not only individuals, but everyone will be relieved when they have a remote theft device. " And with passion for physics, Tuyen has learned and built up "Multi-faceted theft alarm system".

Nguyen Thi Kim Tuyen.(Photo: Character provided).

Taking the foundation from theft alarm devices on the market, Tuyen further improved new ideas. Since then, with this new system, no matter what we do, wherever we go, we can cross the space to control the safety of the property.

When testing the product "Multi-faceted theft alarm system" , Tuyen met with failures dozens of times. Do not be discouraged by the reason "to invest a lot of effort and money into it" , Tuyen crap with piles of electronic components, the circuit diagram made successful.

"When the system worked smoothly, I jumped up with joy and immediately called my parents to share the joy , " Tuyen said.

Multi-faceted theft alarm system of Tuyen.(Photo: Character provided).

To achieve that success, few people know that Tuyen has encountered many difficulties in the purchase of electronic components. On weekends, Tuyen is determined not to be "dragged" by friends on outings, but she refines piles on an old bicycle searching for parts. Many owners of old electric appliance establishments, electronic repair shops, were not surprised to see a small girl wearing school clothes asking to buy things that usually only paid the attention of men.

In order to save costs, the components available in my family's electrical appliances are all "requisitioned" as inventions.

"Luckily, my parents are always there and support me with all my heart. There are times when the system fails, I want to cry. Call me to talk to my mother, hear the words of encouragement and comfort from my mother. , I was determined to continue, " Tuyen recalls.

After many months of research, Tuyen's "Multi-faceted Alarm System" has successfully operated.

The phone will send a notification message to the landlord if a stranger breaks in.(Photo: Character provided).

The system operates at 5V voltage, using transformer plug to switch from civil voltage 220V to 5V. When turned on, the system will send a message to the programmed subscriber number with "Ready system". The system uses infrared barrier sensor including 1 led receiver and 1 led transmitter. When there is an obstacle, the receiver does not receive an infrared signal, the LED resistor is very large, the voltage increases to approximately 5 V as the alarm rings. Microcontroller will click on GSM sim module 900A + PCB Antenna to send message and call to owner. The content of the message sent and the subscriber's number received the message with the content "Breaking in from door 1" when there is an obstacle between two leds at door 1, the content "Having broken in from door 2" when there is an obstacle between two leds at door 2.

The most favorable thing about this system is the ability to make text messages and call the property owners via Module Sim 900A. In addition, Tuyen places the common infrared led pairs with LED infrared sensor lights with LED receiver and LED transmitter attached together, convenient for installation and do not have to take measurement to make 2 LEDs interact with together. Multi-faceted burglar alarm system operates at a small voltage so it also saves a large amount of electricity for users.