The 555 timer IC is an integrated circuit used in a variety of timer, delay, pulse generation, and oscillator applications. It is one of the most popular timing ICs due to its flexibility and price. Derivatives provide two or four timing circuits in one package. [2]

It is a highly stable integrated circuit that can produce accurate time delays and oscillations. The 555 Timer has three operating modes, bistable, monostable and astable mode. Let’s take a closer look what’s inside the 555 Timer and explain how it works in each of the three modes.

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555，全称“通用单双极型定时器”（General-purpose Single Bipolar Timer），意思是555的一个芯片中包含一个（单）用三极管做成的（双极型）定时器。 它在外接一个电阻和一个电容后，能够精确地实现延时功能。 利用这个功能我们可以实现很多种电路，最常用的有三种： 下面分别介绍每一种电路的结构和用法。 在具体介绍每一种电路之前，我们先来看看555的引脚图。 这里以 NE555 为例。 各个引脚的功能如下： 1脚：接地。 2脚：输入端Trigger，该脚会判断其电压是 …

Jun 4, 2021 · In this 555 Timer tutorial, you’ll learn how to use the 555 timer to do fun things. One of the first things many do with it is to create a blinking light. But that’s just one simple example of the many things you can do with this chip. You can also control motors, create an alarm, create a musical instrument, and much more.

Jul 4, 2021 · IC 555 timer is a one of the most widely used IC in electronics and is used in various electronic circuits for its robust and stable properties. It works as square-wave form generator with duty cycle varying from 50% to 100%, Oscillator and can also provide time delay in circuits.

Jan 5, 2021 · What is a 555 Timer IC? The IC 555 timer is a one type of chip used in different applications like an oscillator, pulse generation, timer. The designing of IC 555 timers can be done by using various electrical and electronic components like transistors, resistors, diodes and a …

555定时器是一种 集成电路芯片，常被用于 定时器 、脉冲产生器和振荡电路。 555可被作为电路中的延时器件、触发器或起振元件。 555定时器于1971年由西格尼蒂克公司推出，由于其易用性、低廉的价格和良好的可靠性，被广泛应用于电子电路的设计中。 许多厂家都生产555芯片，包括采用 双极型晶体管 的传统型号和采用 CMOS 设计的版本。 555被认为是年产量最高的 芯片 之一，仅2003年，就有约10亿枚的产量。 555定时器由Hans R. Camenzind于1971年为西格尼蒂克公 …

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Timer IC 555 can be used for various applications like accurate timing, sequential timing, time-delay generation, pulse generation. Other various applications are width modulation, pulse position modulation, missing pulse detection, and clock application.