JFC0603-0250FS

1.What is PWM?     It is pulse width modulation, or PWM for short. A very effective technique for controlling analog circuits using the digital output of a microprocessor is the control of pulse wi...[Details]

　　Abstract: Combining ZigBee wireless short-range communication technology, a wireless sensor network system architecture for industrial waste gas monitoring is proposed. The network node hardware ci...[Details]

/***************************  The interrupt method allows the main program to focus on other things.  The interrupt subroutine will be executed only when the timer interrupt occurs.   ***************...[Details]

#include "AT89X52.H" #include "math.h" sbit NTL = P0^0;//Relay control, output sbit NTR = P0^1; sbit NTU = P0^2; sbit NTD = P0^3; sbit INL = P0^4;//Detection voltage of pan/tilt motion status, input ...[Details]

/*   * File:   main.c  * Author: sm116  *  * Created on June 12, 2017, 9:27 AM  */ #pragma config FOSC = INTOSC    // Oscillator Selection (INTOSC oscillator: I/O function on CLKIN pin) #pragma confi...[Details]

On the Windows operating system, the system startup process is as follows: Start BIOS; Boot the Windows operating system; Identify C, D disk, etc.; Run applications such as QQ, MSN, etc.; Similarly...[Details]

1. Design requirements Design an intelligent temperature measuring instrument, use a temperature sensor to measure the ambient temperature, and have an over-temperature alarm function. It is required...[Details]

First question: What is a stepper motor? A stepper motor is a motor that uses an electrical pulse signal to control the motor to rotate a specific angle. For example, if you give the motor a pulse si...[Details]

1. Infrared receiving principle Bit definition: Pulse position modulation uses the time of "0" and "1" to distinguish. In a short pulse, bit "0" represents 0.56ms + ("1" time) ms, while bit "...[Details]

This time, u-boot-2010.09 is ported based on the FL440 board of S3C2440. The board comes with NANDFLASH but no NORFLASH, so redirection from NANDFLASH to SDRAM must be implemented during the U-BOOT...[Details]

  I have been engaged in ARM development for so long, but I have only a vague understanding of the meaning of entry point. Today, I took out a fairly well-written ARM textbook to read again...[Details]

0 Preface LCD screens are increasingly used in handheld devices. Since the LCD itself cannot emit light, it requires a strong light source to provide it with backlight in order to display information...[Details]

　　0 Introduction 　　GSM (Global System for Mobile communication) is a relatively mature and widely used mobile communication system based on time division multiple access technology. The SMS Short Me...[Details]

1 Introduction Normally, printers, mass storage devices and other devices are driven by ordinary PCs. Since a large number of measurement and control, medical and other systems need to store a...[Details]

0 Introduction An embedded system is a special computer system. The system is based on computer technology, and the software and hardware can be tailored, but it has strict requirements on functions,...[Details]