Thousands and Billion Of different types of integrated circuits are available for electronic devices. Most of these were designed for very specific applications. However, many integrated circuits have been designed for general purpose use and therefore are widely used Variety of circuits.
All these integrated circuits have been around for decades, but their versatile design, wide availability and low cost have given them great popularity.
The 555 timer chip was invented in 1971 but is still today one of the most popular integrated circuits in use. According to some estimates, more than a billion of them are manufactured and sold each year.
As its name implies, the 555 is a timer circuit. The time interval is controlled by an external resistor / capacitor (RC) network. In other words, by carefully choosing the values of the resistors and capacitors, you can vary the duration From tim
The 555 can be configured in several different ways. In a configuration (called a monostable), which functions as an hourglass: It is configured, and then exits after a certain period of time has elapsed. In a different configuration (called astable) Which functions as a metronome, which triggered pulses at regular intervals.
In addition to the basic 555 chip, which comes in an 8-pin DIP package, you can also get a dual 556 timer, which contains two 555 independent timers in a single 14-pin DIP package. Because many common circuits require two timers 555 working together, the 556 package is very popular.
741 and LM324 Operational Amplifiers
An op-amp is a special type of circuit amplifier that has many applications in electronics. Although there are many different types of circuits of operational amplifiers, the 741 and LM324 are the most common.
The 741 is an operational amplifier circuit in an eight-pin DIP package. It was first introduced in 1968 and remains one of the most widely used integrated circuits ever made. The 741 is one such integrated circuit that requires both voltage positive and negative.
The LM324 was introduced in 1972. It consists of four separate operational amplifier circuits in a single 14-pin DIP package. Unlike the 741, the LM324 does not require separate negative and positive voltage supplies.
78xx voltage regulators
The 78xx is a family of simple voltage regulator integrated circuits. A voltage regulator is a circuit that accepts an input voltage that can be varied within a certain range and produces an output voltage that is a constant value, regardless of Fluctuations in the input voltage.
The xxx at 78xx represents the actual voltage regulated by the chip. For example, a 7805 produces an output of 5 V. The input voltage must be at least a couple more volts of the output voltage, and can be as high Like 35 V.
74xx logical family
One of the main uses of integrated circuits is for digital electronics and the 74xx is one of the oldest and even most widely used families of digital integrated circuits. The 74xx family includes a wide variety of chips that provide basic building blocks for digital circuits . You will not find complete microprocessors in the 74xx family. But you will find circuits such as logic gates, flip-flops, counters, buffers and others.