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The camera flash is mostly used for instant lighting in low-light situations, and it is also used in brightly-lit situations to partially fill light in the subject.

It can emit strong light in a short period of time, and it is a photographic accessory for photosensitivity. It is mostly used for instantaneous lighting in low-light situations, and also used in brightly-lit situations to partially fill light in the subject. Small size, safe to use, easy to carry and stable performance.

After the flash is fully charged, the flash sync contact on the camera turns on the flash circuit. During the flash firing period, the light emitted from the flash illuminates the subject, reflects off the subject and enters the camera (for exposure) and the flash metering element. This photometric element quickly converts the light energy into an electric signal and inputs it to the integrating circuit, and then the integrating circuit outputs an electric signal proportional to the amount of flash light; when the amount of flash light reaches the requirement of appropriate exposure, the integral circuit’s The output of the electrical signal causes the control circuit to trigger the flash stop circuit, thereby extinguishing the flashlight.

The mobile phone battery is an energy storage tool that provides power to the mobile phone. It consists of three parts: a battery cell, a protection circuit and a casing. The mobile phone battery generally uses a lithium battery and a nickel-metal hydride battery. For the "activation" of the lithium battery, there are many opinions Yes: The charging time must be more than 12 hours, and full charge and discharge are repeated three times to activate the battery. This statement of "the first three charges must be charged for more than 12 hours" is for rechargeable batteries in the 1990s. The nickel-cadmium batteries at that time had a memory effect and needed to be fully charged to ensure battery capacity. The mobile phone uses a lithium-ion battery, which has no memory effect. Generally, it can be fully charged in 2-3 hours, which is enough. If the first three charging and discharging of the new battery can really reach 12 hours or more, it will cause great damage to the battery, and may cause the battery to swell or even burn. Fortunately, both the mobile phone and the charger have protection circuits. When it is fully charged, it will automatically power off, and it will not continue to charge when plugged into the charger. However, it is better to unplug the charger at this time to prevent the charger's protection circuit from overcharging, causing serious damage to the battery materials and affecting the battery's capacity and life.

A tire pressure gauge or a car tire pressure gauge is a special pressure gauge designed to measure the pressure in the tires of cars, trucks, bicycles, etc. The tire pressure gauge adopts pressure sensing technology with high measurement accuracy (error less than 0.05%) and long service life. Use the tire pressure gauge to test the tire pressure in time, so that the driver can know the tire pressure of his car tire in time. The pointer type operation is simple, the digital reading is convenient, and the alarm type does not display the tire pressure value. Each tire pressure gauge has a certain pressure measurement range. Generally, 0-100PSI is enough for household use, and heavy-duty tire pressure gauges for trucks, etc. are not required.

The tire inflator is a cutting-edge technology product that automatically adjusts the tire pressure through a microprocessor and a pressure sensor. It can complete the inflation/deflation/inspection of the tire at one time. It has high accuracy, fast speed, durability, simple operation, and brings better tires. protection of. It completely replaces manual barometers to eliminate errors and better protect tires.
The tire pressure is returned to the sensor to automatically calculate whether the tire needs to be inflated or deflated, open the valve, and perform work until the pressure reaches the correct tire pressure value.

The car horn generates sound through the vibration of the metal diaphragm. The car horn is composed of iron core, electromagnetic coil, contact, armature, diaphragm, etc. When the driver presses the horn switch, current flows through the coil through the contacts, and the coil generates magnetic force to attract the armature, thereby forcing the diaphragm to move. The armature moves to open the contacts, the current is interrupted, and the magnetic force of the coil disappears. The diaphragm is elastic and spring. Under this action, it returns to the original position together with the armature, the contact closure circuit is connected again, the current flows through the coil through the contact to generate magnetic force, and the above action is repeated. In this way, the diaphragm keeps vibrating and produces sound. The sound board is rigidly connected to the diaphragm, which can make the vibration stable and make the sound more pleasing (ie the principle of electromagnet)

According to the sound power, car horns are divided into two types: air horn and electric horn; according to their appearance, they are divided into three types: cylindrical, spiral and basin; according to the sound frequency, they are divided into two types: tweeter and woofer.
The horn is the audio signal device of the car. In the driving process of the car, the driver sends out the necessary audio signals according to needs and regulations to warn pedestrians and attract other vehicles to ensure traffic safety. At the same time, it is also used for urging and transmitting signals.

Motorcycle gloves can be roughly divided into two types according to their length: long gloves and short gloves. The length of the gloves is not only the difference in appearance, but also for different wearing needs: long gloves can provide better coverage and protection, but are less flexible and difficult to put on and take off; short gloves make up for this situation and have better It is flexible and easy to put on and take off, but its protection is relatively lower than that of long gloves. Therefore, among the following different types of gloves, according to the characteristics of the length of the gloves, they have different appearances.

Motorcycle gloves are a kind of sports gloves. As the name suggests, they are mainly used for driving motorcycle gloves, especially those used by motorcycle racers. Motorcycle gloves are exquisite in materials, complex in style, and highly functional in resistance to friction and impact. Motorcycle gloves are generally made of genuine leather or high imitation leather, with high-quality foam materials that resist friction and impact at the joints, and carbon fiber protective parts on the back of the hand if necessary. Motorcycle gloves, like other sports gloves, are products of a labor-intensive industry. Due to their complex shapes and functions, they require many processes to complete.

Car GPS navigation, navigator is a car driving assistance device that can help users accurately locate their current location, calculate the itinerary according to the established destination, and guide the user to the destination through map display and voice prompts. The current market sales are very broad, and the general civilian navigation GPS is often mentioned by everyone. Such GPS is mainly used for car positioning and navigation. At present, more and more developed roads and intricate viaducts make it increasingly difficult for drivers to distinguish the road. Navigating the car GPS really brings great convenience to the driver!

A simple GPS vehicle tracking system, mobile network vehicle gprs positioning anti-theft device, vehicle GPS navigator, we think more of leading the way, anti-monitoring, in fact, as a vehicle-mounted product, it should be able to give more content, such as Security content, but at present, GPS navigators sold on the market are more of navigation, monitoring and entertainment as their main selling points, while ignoring more important safety factors. The current car GPS navigator will soon be launched. Remote anti-theft monitoring system! Know if your car is safe anytime, anywhere!