When hardware engineers first come into contact with multi-layer PCBs, it is easy to feel dizzy. There are often ten or eight layers, and the circuits are like spider webs.Draw several diagrams of the...
When the microcontroller is powered off, all data in the RAM data area will be lost. For example, if you use an MP3 player and start playing from the first song every time you restart it, after a few...
Abstract: The power angle measurement data acquisition card introduced is a PCI bus interface card implemented by the Cygnal C8051F021 single-chip microcomputer. The card uses two dual-port RAMs to ex...
[size=4]The sound card obtains the sound analog signal from the microphone, and converts the sound wave amplitude signal into a series of digital signals through the analog-to-digital converter (ADC),...
[size=4] 1. Circuit Function Overview [/size] [size=4] [/size] [size=4] The infrared diode sensing circuit can realize that when the hand is close to the infrared transmitting tube and the infrared re...
Dear experts: I want to use SMD transistors to replace the pin-insertion transistors S8050 and S8550. What type of SMD transistors do I need? I need them urgently! Please help me!...
I've been working on a stm32 project recently, using a pirated jlink for debugging. Suddenly, after downloading the program one time, the stm32 started to restart infinitely. I measured the reset pin...[Details]
Schematic diagram and circuit diagram of USB sound card based on PCM2702
Make a sound card is no more a complex issue. If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can cre...[Details]
On October 20, at the 2021 Yunqi Conference, Zhou Ming, vice president of Alibaba Group and head of Alibaba Cloud Infrastructure, said that Alibaba Cloud will accelerate the use of clean energy in ne...[Details]
A voltmeter is an instrument for measuring voltage. It is an instrument installed on the panels of power, telecommunications, and electronic equipment to measure the voltage in AC and DC circuits. A ...[Details]
I made a simple 19264 LCD clock with large digital display, using DS1302 and ds12cr887 clock chips, two corresponding programs respectively. Only hours, minutes, seconds and temperature are displayed...[Details]
Q: Except for the P0 port, the outputs of the microcontroller are all 5V, right? Then why do we need to add a transistor to drive the digital tube? For example, if we add a 100 ohm resistor, the curre...[Details]
Chapter 3 Starting the System Download the kernel image file and root file system image file generated in the previous two chapters to the mini2440 development board and check the startup informatio...[Details]
Designing
LED drive
solutions, if the current is greater than 500 mA,
a
switching
regulator is usually used to
drive
the LED
; if the current is between 200 mA and 500 ...[Details]
On November 30, 2020, OmniVision, a world-leading Chinese semiconductor design company, and Horizon Robotics, an edge AI chip company, signed a strategic cooperation agreement in Beijing. The two par...[Details]
Due to various reasons, buses always repeat the process of acceleration-deceleration or parking-reacceleration. By installing this energy-saving device, when the car needs to brake, under the contr...[Details]
On May 3, Tianfeng International released its latest Apple analysis article, predicting that Apple will launch an 8-inch QHD+ OLED foldable screen iPhone in 2023. Samsung Display will exclusively pro...[Details]
introduction
Motion recognition is a hot topic. Imagine an MP3 player without any touch or mechanical buttons. You can perform all the most basic control operations by shaking it left, right, ...[Details]
On the evening of August 9, Dongshan Precision released its 2019 semi-annual report. The company achieved operating income of 9.979 billion yuan, an increase of 38.37% over the same period last year;...[Details]
Servo drives are an indispensable key component in the field of modern industrial automation. They can accurately control the speed, position and torque of the motor and are widely used in robots, ...[Details]