The main and backup batteries are connected to the load through a simple diode OR logic. However, when the battery voltage exceeds the mains voltage, the diode OR logic will be connected to the battery and the mains supply cannot be reasonably selected. The circuit of Figure 1 shows a solution to this problem. The main switching power supply has a voltage range of 7V to 30V, and the backup power supply is a 9V battery.
Figure 3. The output response of Figure 1 is free of transient interference when the mains supply is quickly restored.
10-inch tablet devices have greatly surpassed netbooks in terms of entertainment, including reading, games, and audio-visual enjoyment. In other respects, the basic operation of the 10-inch tablet computer built on the touch screen ensures that the application of the tablet computer can be well realized, and its operation performance is closer to that of a smartphone.
1.In appearance, the 10-inches tablet computer looks like a large-screen mobile phone, or more like a separate LCD screen.
2.In terms of hardware configuration, the 10-inches tablet computer has all the hardware devices of a traditional computer, and has its own unique operating system, compatible with a variety of applications, and has a complete set of computer functions.
3.The 10-inches tablet computer is a miniaturized computer. Compared with traditional desktop computers, tablet computers are mobile and flexible. Compared with Laptops, tablets are smaller and more portable
4.The 10-inches tablet is a digital notebook with digital ink function. In daily use, you can use the tablet computer like an ordinary notebook, take notes anytime and anywhere, and leave your own notes in electronic texts and documents.
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