K86-BB-44P-KJ15

Many friends have development boards or learning boards based on STC microcontrollers. I have seen that most people download programs by cutting off the power and cold starting. In fact, the ISP softw...[Details]

GPRS (General Packet Radio Service) is the abbreviation of General Packet Radio Service, which is a data transmission technology based on the Global System for Mobile Phones (GSM). GPRS network not o...[Details]

a)                Purpose: Similar to serial port input, IO input without interrupts is also inefficient, and button events can be inserted through EXTI. This section is related to EXTI interrupts. ...[Details]

Keithley source meters are widely used in scientific research, but do you really understand source meters? What is a "source" and what is a "meter", do you know? "Source" refers to voltage source and...[Details]

Harald Haas from the University of Edinburgh is a pioneer in Li-Fi technology and has published a series of excellent TED talks and papers on the subject. He is also the co-founder of pureLiFi, a lea...[Details]

Text Introduction to the principle of ultrasonic flowmeter: Currently, two types of ultrasonic flowmeters are commonly used, one is Doppler ultrasonic flowmeter, and the other is time-difference ultra...[Details]

引 言         步进电机是一种将电脉冲信号转换为角位移的执行机构。其主要优点是有较高的定位精度，无位置累积误差；特有的开环运行机制，与闭环控制系统相比降低了系统成本，提高了可靠性，在数控领域得到了广泛的应用。但是，步进电机在低速运行时的振动、噪声大，在步进电机的自然振荡频率附近运行时易产生共振，且输出转矩随着步进电机的转速升高而下降，这些缺点限制了步进电机的应用范围。步进电机的性能在很...[Details]

I recently played with MAX7129 to control dot matrix, and made a scrolling display using 51 and MAX7219 to control two 1088AS dot matrixes. This article is a summary. It is convenient for me to revie...[Details]

　　Network Analyzer User Manual 　　1. Purpose 　　This instruction manual is to standardize the operation of the vector network analyzer to avoid damage to the instrument caused by improper operation; it...[Details]

As an important part of mechanical equipment, the safe and normal operation of R-type transformers is very important. Once an abnormal situation occurs, the entire equipment will not be able to ope...[Details]

If you want to ask what is the internal driving force for human development to this day, it must be the pursuit of efficiency. The history of automobile development is a history of tools improving ...[Details]

Application Technology of Digital Potentiometer From the perspective of application, this paper introduces the method of rationally designing application circuits and rationally select...[Details]

Huawei's Mate 30 series has been officially released, and as a leading domestic mobile phone brand, Huawei's supply chain localization has always attracted much attention. Now, a semiconductor organi...[Details]

0 Introduction The CAN bus was originally proposed to solve the signal transmission problem inside the car. It is currently widely used in control fields such as industrial field control units, inte...[Details]

;Equal- period pulse width modulation PWM ; Crystal oscillator : 12M Hz ;89C51 P_PWM1 EQU P1.0 cycle EQU 1000 ;PWM cycle (in microseconds), the frequency is 1000 Hz cycle_high EQU 500 ; The time...[Details]