Decomposition a millet self-powered doorbell: perfect design, why do you never need a battery?

Today, let's take a look at how to know how you don't need a battery. How is the generated doorbell? From the outer packaging, Linptech self-powered doorbells continued the small rice consistent simple style. The whole cooperation uses a white style. The middle of the box is a doorbell icon. There is a sign in the upper left corner. The box is good, and it is smooth. Hardness, from outside the package, this product is more likely. Specially emphasized from self-power on the box. After opening the box, the middle is the Linptech doorbell, and the surrounding card is wrapped, which can effectively avoid damage to the product during transport. Here you can see the pressing doorbell. LinPtech covered with 3M viscose from the back of the power generation doorbell, covered with paper, there are some installation and use tips. Everyone can paste it on a smooth wall according to their own situation, or it can be used on the door, however, be careful not to be installed on the security door because the metal doors will weaken its signal. And this is the receiver of LinPtech self-powered doorbells. It is also a circular design. The lower side is a circular button. There is 2 different functions in the circle. The left is the volume adjustment button. It has 5 gear. Adjustment, and both WiFi reset function; the right side is the music key, the built-in 36 music is optional, as long as the hand is pressed on the top, you can easily switch the music. We put a call to try it, and we have a pleasing ringtone after pressing. Below we are still nonsense, open and see how to do any battery. After opening, we can see the function board and coil, the function board should be a low-power wireless transmit module, how is this block of this design? How to do power? First remove the coil to see what structure is, especially on the right, there is a piece, when we press it, it should be triggered. Let's take a closer look at what mystery in this patch. Oh, the magnet, have you ever thought of a physical concept of a call? Electromagnetic induction, patch activity, will cut the magnetic field, generate an induction current, however this small current is enough for us to use the low power wireless communication module, which is really a perfect design. Circuit city dismantling summary: In fact, the principle of millet products from power generation door bells are not complicated. When using hand to press the doorbell, the generated pressure will cause the internal closure conductor to cut the magnetic line generation current, while the current can drive the doorbell. Workmanship is still very good, from the dismantling, Xiaomi's things are more difficult to remove. This is actually a little minor in daily life, and science and technology change life. Source: hard core dismantling; circuit city editorials are released, please indicate the source!