Today, Xiaobian has more pieces of Xiaomi portable LED lights. When it comes to LEDs, everyone thinks that the brightness is high, the heat is low, and the power is saved. A few decades ago, my grandmother was under the kerosene lamp, and she often had a power outage 20 years ago. Her mother sometimes supplemented the sewing under the candle. The common point of kerosene lamps and candles is that they have low brightness and are prone to burns, and serious fires may occur. Do you still remember the pain of reading a book in the bed after going to school in the dormitory? Holding your hands for a long time will make your arms sour, and it’s hard to put on the books. Now the problem with the LED light on the millet is also solved.
The power of the millet portable LED lamp is 1.2W, and the power supply voltage is 5V. The continuous use time of each mobile power source is calculated by these two known conditions. 1.2w/5v=0.24a. 0.24a=240ma In order to better prove the actual working current of the LED lamp, Xiaobian deliberately purchased a small USB power meter. The working current calculated by Xiaobian is 0.24A. This is only the theoretical value. In practice, there are other electronic components and wires that are resistant to the current, so the actual current has a certain error with the theoretical value. Millet portable LED lights on all capacity millet mobile power supply time
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Today, Xiaobian will give you the opportunity to open the LED light of the millet and walk into the LED light to see the structure and workmanship. Viewing the structure of the LED light from the outside is not complicated, so the tool is relatively simple. The LED lamp is unrecoverable after being removed from the overall design, so it is not recommended to disassemble it. Xiaobian is also purely handcuffs. After reading this post, you saved 19.9 yuan. Is it very cost-effective? Disassemble is risky and should not be easily imitated. Remove the front frosted mask to see the internal LED lights and some electronic components. The advantage of using a frosted mask is to avoid direct light. The light from the adjacent two lamps will refract the light of the entire LED body. Integration, there will be no black shadow between each lamp. After refracting, the light that enters the eye will be softer and less dazzling. At first, I thought that the millet LED lamp adopts the design of universal bending. Now, solve the mystery that can't be bent universally. Be careful not to draw it here. This knife will mean that it will never be restored. So curiosity is a price to pay. After the LED lamp's clothes are smashed, the bent part is a 14# high-toughness wire. This wire is very soft and easy to shape and does not rebound. Two good quality 0.5 square millimeter tinned copper wires. Such a wire can withstand a current of 3 A, so it is completely sufficient to make a 1.2 W LED lamp power cord. Everyone can use it with confidence. After opening, it is found that the millet LED lamp is not a universal bending because it takes into consideration the mechanical structure and mechanical strength. The design of the circuit board is very simple, the wiring is orderly and the workmanship is exquisite. Each LED lamp bead is very large, so that it has a higher lumen. I saw the Xiaobian stunned here. The circuit board and the heat conducting board are not conducted by using thermal grease , but are printed directly after the metal board is coated with an insulating layer. This heat transfer efficiency is greatly improved. In order to consider the lower thermal conductivity of the plastic, a metal middle frame is added before the plastic casting to allow the heat to be led to the rear heat sink faster. Accelerate the internal and external heat exchange, extending the service life of LED lights and other electronic components. The material of the LED light supply wire is also very particular. Although the color of the wire seen is white, the white wire will first think of aluminum wire and wire. Such a white wire is tin-plated with copper to protect the copper wire from oxidation. Such thick and high-quality copper wire is to reduce the resistance and reduce the electrical loss, so that more electricity becomes light instead of turning it into heat. After measurement, the six LED beads are linked in series. The voltage also rose from 5V to 18V. The careful friend found that the placement of the small-coded test pen was not a normal tandem position, but it was true that Xiao Bian began to wonder. After the actual measurement, the light at the bottom and the other five light beads were placed in reverse. I did not understand it. |
In short: technology is improving, and Xiaomi is making progress. Technology has brought a variety of new products to replace the old ideas, and Xiaomi has let technology enter our lives faster and more harmoniously. I hope this is just the beginning. I hope that more and better technology products will enter our lives faster and better. For the disassemble Xiaobian is just the beginning, after the small series will bring you more disassemble and DIY posts, let everyone know more about the internal structure of Xiaomi products, let us feel more at ease in the convenient life. |
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