Hello. I purchased a kit for wireless power transmission on the Chinese website, also called wireless charging. Of course, this device can be assembled by yourself with your own hands, there are plenty of wireless chargers on the Internet. But I wanted to buy exactly the finished device offered to us as a DIY device. Use as a wireless charging for a mobile phone, I was not going to. But in robotics, I saw clear advantages over wired chargers.
The device you created in robotics can independently estimate the charge of the battery and, if necessary, independently recharge it. For example, the robot, it is enough to go to the appropriate distance to the charger and the charging process will begin. Very convenient, the robot wants to remain in working condition, let him take care of himself.
Wireless charging consists of two parts, the receiver and the transmitter of energy.
The transmitter voltage is twelve volts, and the receiver output is five volts. The stated maximum charging current is six hundred milliamps. Additional documentation on the site was not. Rummaging through the Internet, fished out the following information. The receiver uses a T3168 chip
Unlike the receiver, the transmitter of energy, I will call it so filled with compound. Accordingly, it was not possible to reach the board. In the documentation for the receiver was the response of the transmitter.
But I still got to the board (with a hammer), as it turned out, the scheme is different. The board has been installed two chips, without any designations. Scant information about the mysterious micro builds was obtained on the forums. I found out that these are two powerful transistors included in the high-frequency generator mode. Subsequently, I found out that you can buy and open the board without pouring.
As for the charging current. A wireless charger, as I said, allows you to charge the battery with a current of up to 600 milliamps. But we get this current only in close proximity between the circuits. The table shows the ratio of distance and current.
The demonstration of the wireless charger and a number of others I took on video. In general, I liked the module. In the future I am going to use a wireless charger in my project.