What is the voltage of the USB interface?

Schematic diagram of voltage regulator with expanded output current range

1 Introduction With the development of semiconductor devices and the extensive application of power electronic devices, a large amount of harmonic current has flowed into the power grid, polluting the power grid. This problem has attracted the attention of various countries. In order to limit the total ha

Ⅰ. Write in front Compared with the previous 51 series chips, one of the advantages of the STM8S chip is that it has richer peripheral resources and more powerful functions. Therefore, this article describes a more practical function of the STM8S: ADC voltage acquisition.   In IoT products, most sensors use the analo

　introduction 　　In most areas today, due to the development of industry and commerce and the increase in people's livelihood needs, the lack of water resources has become a potential threat that cannot be ignored. Since the 1950s, various methods of desalination have been invented and improved. In recent years, a new

White light emitting diodes ( WLEDs ) have been widely used, mainly because WLEDs can be used to provide backlighting for portable electronic product displays. It is generally believed that a single WLED requires a 4-volt driving voltage. Since lithium batteries provide a voltage of 3.6 volts, the industry generally b

During the development and testing of electric vehicle drive systems, developers need to measure high-frequency current and voltage in the vehicle's high-voltage electrical system. Due to limited installation space, the installation of measurement equipment will be very difficult. This article shows how to measure c

　　1. Reasons affecting the high output voltage of the switching power supply 　　⑴ The models with voltage doubler rectification in the transmitter may work in voltage doubler rectification state incorrectly when the AC power is normal (only used in some new remote-controlled color TV sets). 　　⑵ Pulse width modulation

0 Introduction In recent years, due to the massive increase in nonlinear loads such as power electronic devices, the harmonic pollution of the power system has become increasingly serious, seriously affecting the accuracy and rationality of electric energy measurement, and disputes caused by this are also c