Mobile power circuit that can not only charge, but also realize outdoor alarm function
Today, mobile power has become an outdoor must-have tool for friends, compared to the previous battery, whether it is function or portability, it is not the same. Of course, since it is outdoor, many functions are essential. Outdoor travel, safety first, and the security of personal belongings is essential. A safe and reliable alarm system helps to protect the safety of personal belongings, especially for outdoor camping. Sensitive anti-theft measures will play a huge role in the night.
　
　
How to design a mobile power solution with outdoor alarm function? Less nonsense, as shown in the figure, when the pre-alarm function button is pressed, the USB output voltage is loaded on the alarm system, and the mobile portable power supply is in the "pre-alarm" state. When the position of the mercury switch B1 is shifted to the normal off position, the relay will be triggered to work, and the KD9561 music piece will work, and an alarm sound will be sounded to remind the safety.
In addition, the high-lighting function in outdoor activities is also essential for mobile power, especially at night, requiring a high-light source. The above figure also has the relevant circuit design for this function. The night-time high-brightness illumination system can get 5V voltage at the USB output port, plus a high-brightness LED and a small current-limiting resistor. The highlight tube is sufficient for the illumination path within 5 meters.
The water glass shell process has low cost, simple operation, and low requirements for raw materials. The basic feature of the process is the use of paraffin-stearic acid low-temperature mold material, and the use of water glass as the binder in the process of shell making. In terms of shell process, its surface quality is average, and its dimensional accuracy is not as high as that of silica sol process, but because of its unique cost, it is widely used in some civil and low-precision internal combustion engines in my country.
Sand Casting,Iron Sand Casting,Oem Sand Casting,Cast Iron Sand Casting Parts
Tianhui Machine Co.,Ltd , https://www.thcastings.com