This paper introduces the working principle of the scheme development of two-way anti-theft device; Probably everyone has lost things, such as mobile phones, wallets, bicycles, electric cars, and even
This paper introduces the working principle of the scheme development of two-way anti-theft device; Probably everyone has lost things, such as mobile phones, wallets, bicycles, electric cars, and even children and the elderly. The lost equipment is small, but the loss of children and the elderly will bring pain to the family. Blow. Therefore, there are devices such as loss prevention devices.
Bidirectional anti-theft device
principle
When the owner unconsciously leaves the object at a certain distance, the mobile phone will be disconnected from the anti loss device. The Bluetooth chip in the anti loss device can work and send out audible and visual alarms, so the owner can quickly and effectively find the lost items.
Bidirectional anti loss device structure
The program design has the advantages of low power consumption, bidirectional loss prevention, automatic alarm and so on. Its core components generally include: Bluetooth chip, MCU main control chip, chip auxiliary circuit, antenna, buzzer, switch, power supply, etc.
Single chip selection
The program is developed using Jiuqi MCU ny8a050d model, and the packaging model is 8-pin SOP.
Realize function
1. Two way search: mobile phone and anti loss device can find each other;
2. Anti loss alarm: when the anti loss device is disconnected from the mobile phone, both the mobile phone and the anti loss device will give an alarm;
3. The radiation of Bluetooth is far less than that of mobile phone, which is harmless to human body.
Bidirectional anti-theft device
Can be applied to
1. Anti loss key;
2. Anti loss baggage;
3. Prevent losing pets;
4. Mobile phone loss prevention;
