I am using Keil to write a matrix keyboard input program for 89s52. I want to record the number of keyboard inputs, but the variable "y" never changes. I don't know what's going on. Can anyone tell me...
Bombercat is a security tool that combines the RP2020 and the ESP32 MCU. It combines the most common technologies: NFC technology (Near Field Communication) for access control, identification and magn...
Resistance R: Resistance refers to direct current, R=U/I. Impedance Z: Impedance refers to alternating current, Z=(R2+(XL-XC)2)-1/2 Characteristic impedance: refers to the resistance encountered by sq...
I feel a little addicted to logging into the EEWORLD forum now. I no longer steal vegetables or go to Renren. I am gradually focusing on the EEWORLD website. I have set the forum as my homepage. When ...
I want to use DSP to make something. The peripheral part is to collect sound signals, digitize them and send them to DSP. After processing, they are output after D/A. I don't know what type of periphe...
SigmaTel announced that the latest IP security digital camera video server launched by Huiyou Electronics has selected the SigmaTel PR818S system-level chip .The DVR supports four camera inputs and fl...
Emergency hand-held lamps powered by 6V maintenance-free batteries are widely used in rural areas. The charger used is a transformer step-down and single diode half-wave rectifier, and the charging...[Details]
Hardware designers have begun to adopt FPGA technology in high-performance DSP designs because it can provide 10-100 times faster computing than PC-based or microcontroller-based solutions. Previou...[Details]
1 Introduction
A wide variety of communication cables and control cables are widely used in various instruments and control equipment. Whether the cable is well-conducted and
whether
th...[Details]
1 Introduction
The high temperature tester is mainly used for temperature tracking measurement and data acquisition during the heating process. By systematically analyzing the test data, the...[Details]
When the WDP500-2A plane grating monochromator is used to test the emission wavelength of a high-power laser diode at different currents, the matching of the laser diode has the disadvantages of lo...[Details]
This article discusses how to wake up a touch-sensitive device such as a tablet without touching the device, using basic gesture recognition and novel proximity sensors. The article discusses the p...[Details]
1. Introduction to CIF Board
Fieldbus integration based on PC system
Whether it is a master or a slave, fieldbus has won unanimous praise in the field of PC-based automation. For more...[Details]
MediaTek (2454) announced the acquisition of F-MStar (3697) and attracted the attention of IC design industry. This morning, Gartner Semiconductor Industry Research Director Hong Cenwei analyzed ...[Details]
0 Introduction
With the rise and continuous improvement of the solid-state lighting industry, light-emitting diodes (LEDs) have become an alternative lighting technology and are gr...[Details]
Problems such as the depletion of natural resources, air pollution, traffic congestion, and rising fossil fuel prices have forced societies and individuals to seek alternative means of transportati...[Details]
Motors, especially those with brushes, generate a lot of noise. This noise must be dealt with if the appliance is to meet the requirements of EMC standards. The means to solve EMC are nothing more ...[Details]
Today, with energy becoming increasingly scarce, the utilization of natural energy has become the focus of people's attention. Among various natural energies, the endless solar energy is highly fav...[Details]
1. Overview
At present, an information revolution is in the ascendant around the world, led by microelectronics, computers and communication technologies, and centered on information technolog...[Details]
1 Introduction
With the improvement of people's quality of life, lamps are no longer just basic indoor lighting tools, but also a kind of practical art for architectural decoration. When ther...[Details]
Liquid crystal display (LCD) panels have a wide range of applications, from small portable electronic devices to large fixed devices, including digital cameras, laptops, personal data assistants, d...[Details]
Embedded System
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