Jan 31 2018
Warm hints: The word in this article is about 3200 and reading time is about 20 minutes. Summary As an electric control device,relay(electornic relay) is a kind of electrical apparatus that causes the controlled variable to have a step change in the electrical output circuit when the ch
Jan 29 2018
SummaryThere are a wide range of electrical pulse shape, sch as a rectangular, triangular, zigzag, bell, staircase and spire-shaped, the most representative of which is the rectangular pulse. Pulse circuit is designed to produce electrical pulses and electric pulse amplification, transformation and
Jan 25 2018
Warm hints: The word in this article is about 2800 and reading time is about 14 minutes. Summary In this article, it will mainly introduce a low frequency function signal generator project based on single chip microcomputer 89C51 . By adopting the technology of digital waveform s
Jan 23 2018
Warm hints: The word in this article is about 3500 and reading time is about 18 minutes. Summary This paper presents a new design of high-power adjustable switching power supply. Using Buck-type switching power supply topology, with a single PWM output, MC33060 as a control IC, and dual ou
Jan 20 2018
Warm hints: The word in this article is about 2500 and reading time is about 12 minutes. Summary Isolator--also known as the signal isolator, is an important part of the industrial control system, is a linear optocoupler isolation principle, the input signal is converted to output. The input,
Jan 19 2018
Warm hints: The word in this article is about 3500 and reading time is about 18 minutes. Introduction It has been more than 40 years since the analog operational amplifier was born. The earliest process is the use of silicon NPN process, later improved to silicon NPN-PNP process (hereafter called
Jan 18 2018
SummaryTransistor switching circuit (working in saturation state) is commonplace in modern circuit design applications. The classic 74LS, 74ALS and other integrated circuits use transistor switching circuits internally, but they have only common driving capability. Transistor switching circuit is di
Jan 17 2018
Warm hints: The word in this article is about 3200 and reading time is about 20 minutes. Summary A microcontroller is a single chip microcomputer that integrates the main parts of a microcomputer on a chip. The microcontroller was born in the middle of 1970s. After 20 years of development, its cos
Jan 15 2018
Warm hints: The word in this article is about 4800 and reading time is about 28 minutes. Summary Currently there mainly includes two types of power supply: linear power (linear) and switching power (switching). This paper is mainly about analysis of switching power supply principle,such as linear
Jan 12 2018
Warm hints: The word in this article is about 4000 and reading time is about 25 minutes. Summary Thermistors are a type of sensitive component, which are divided into positive temperature coefficient thermistor (PTC) and negative temperature coefficient thermistor (NTC) according to the temperatur
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