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This design is a calculator simulation system design with STC89C52 microcontroller as the core. The input uses a 5×8 matrix keyboard, which can perform more than a dozen digital operations such as ad...[Details]

Reference: "STM32F4xx Chinese Reference Manual" RCC chapter. The STM32 clock can be roughly divided into two categories: system clock and other clocks, including a total of 5 clock sources: HSI (Hi...[Details]

Program encryption The protection of scientific research results is the most concerned thing for every researcher. In order to prevent their hard work from going to waste, program encryption is ver...[Details]

The U.S. Consumer Product Safety Commission said Apple will recall about 432,000 15-inch MacBook Pro laptops because the batteries may overheat and cause fires. About 63,000 batteries are affected in...[Details]

It is common to have insufficient accuracy in oscilloscope measurements, especially when measuring weak signals, phase noise, small voltage ripples, and small voltage signals in large voltages. Theref...[Details]

50,000 times/week, 300 times/hour, 5 times/minute... Do you know what these numbers mean? Recently, self-driving technology company Waymo announced that its robot taxi service Waymo On...[Details]

The HVLED805 from ST is an off-line LED driver with primary-sensing. It includes a high-performance low-voltage PWM controller and an 800V avalanche-rugged power MOSFET. It can be directly connecte...[Details]

Many production machines use inverters to control the forward and reverse rotation of the motor. The circuit is shown in Figure 1-1. The inverter is explained using Siemens MM440 as an example. DIN...[Details]

The control of the frequency converter is nothing more than the basic logics of start, stop, forward, reverse, and speed regulation. These logics basically require the level state to be valid, rath...[Details]

Introduction Wheels are important safety components of automobiles and have a significant impact on the driving safety, ride comfort and passenger comfort of automobiles. Wheels generally work under ...[Details]

0 Introduction Infrared remote control is one of the most widely used communication and control means at present. It is widely used in household appliances, industrial control and intellige...[Details]

　　Wearable electronic devices have become the new focus of brand manufacturers, and smart glasses will set off a new gold rush in the semiconductor market. The Google Glass market is hot, attracting ...[Details]

In the audio industry, in addition to the amplifier, speaker, sound source and other equipment, the signal connection wire is also very particular. The price of each wire ranges from hundreds to thous...[Details]

Shenzhen Youwei Technology Holding Group Co., Ltd. (hereinafter referred to as "Youwei Technology") announced that it has received another RMB 100 million in C++ round financing, with capital increas...[Details]

This system consists of a single-chip microcomputer system, keyboard, LCD display, and traffic light demonstration system. The system includes sidewalks, left turns, right turns, and basic traffic ...[Details]