Electronics circuits diagram and repair

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this is the common code you can use to test your iphone .. follow for more

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This auto cut power when the battery is full

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An integrated circuit (IC), also known as a microchip or simply chip, is a compact assembly of electronic circuits formed from various electronic components, such as transistors, resistors, and capacitors, and their interconnections.[1] These components are fabricated onto a thin, flat piece ("chip") of semiconductor material, most commonly silicon.[1] Integrated circuits are integral to a wide variety of electronic devices (including computers, smartphones, and televisions) performing functions such as data processing, control, and storage. They have transformed the field of electronics by enabling device miniaturization, improving performance, and reducing cost.

A microscope image of an integrated circuit die used to control LCDs. The pinouts are the dark circles surrounding the integrated circuit.
Compared to assemblies built from discrete components, integrated circuits are orders of magnitude smaller, faster, more energy-efficient, and less expensive, allowing for a very high transistor count. Its capability for mass production, its high reliability, and the standardized, modular approach of integrated circuit design facilitated rapid replacement of designs using discrete transistors. Today, ICs are present in virtually all electronic devices and have revolutionized modern technology. Products such as computer processors, microcontrollers, digital signal processors, and embedded processing chips in home appliances are foundational to contemporary society due to their small size, low cost, and versatility.
Very-large-scale integration was made practical by technological advancements in semiconductor device fabrication. Since their origins in the 1960s, the size, speed, and capacity of chips have progressed enormously, driven by technical advances that fit more and more transistors on chips of the same size – a modern chip may have many billions of transistors in an area the size of a human fingernail. These advances, roughly following Moore's law, make the computer chips of today possess millions of times the capacity and thousands of times the speed of the computer chips of the early 1970s.
ICs have three main advantages over circuits constructed out of discrete components: size, cost and performance. The size and cost are low because the chips, with all their components, are printed as a unit by photolithography rather than being constructed one transistor at a time. Furthermore, packaged ICs use much less material than discrete circuits. Performance is high because the IC's components switch quickly and consume comparatively little power because of their small size and proximity. The main disadvantage of ICs is the high initial cost of designing them and the enormous capital cost of factory construction. This high initial cost means ICs are only commercially viable when high production volumes are anticipated.

Terminology

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Intellectual property

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Silicon labeling and graffiti

15/05/2026

Amplifier is ready for us,done repairing the amplifier

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Amplifier is ready

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Electric motor controller circuit diagram

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A transistor is a semiconductor device used to amplify or switch electrical signals and power. It is one of the basic building blocks of modern electronics.[1] It is composed of semiconductor material, usually with at least three terminals for connection to an electronic circuit. A voltage or current applied to one pair of the transistor's terminals controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal. Some transistors are packaged individually, but many more in miniature form are found embedded in integrated circuits. Because transistors are the key active components in practically all modern electronics, they are considered one of the 20th century's greatest inventions.[2]
Transistor

Component type
Active
Inventor
* John Bardeen
* Walter Brattain
* William Shockley
Invention year
1947
First produced
1950s
Pin names
Base, collector, and emitter
Electronic
Component type
Active
Inventor
* John Bardeen
* Walter Brattain
* William Shockley
Invention year
1947
First produced
1950s
Pin names
Base, collector, and emitter
Electronic symbol



NPN and PNP symbols

Metal–oxide–semiconductor field-effect transistor (MOSFET), showing gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (white).
Physicist Julius Edgar Lilienfeld proposed the concept of a field-effect transistor (FET) in 1925,[3] but it was not possible to construct a working device at that time.[4] The first working device was a point-contact transistor invented in 1947 by physicists John Bardeen, Walter Brattain, and William Shockley at Bell Labs who shared the 1956 Nobel Prize in Physics for their achievement.[5] The most widely used type of transistor, the metal–oxide–semiconductor field-effect transistor (MOSFET), was invented at Bell Labs between 1955 and 1960.[6][7][8][9][10][11] Transistors revolutionized the field of electronics and paved the way for smaller and cheaper radios, calculators, computers, and other electronic devices.
Most transistors are made from very pure silicon, and some from germanium, but certain other semiconductor materials are sometimes used. A transistor may have only one kind of charge carrier in a field-effect transistor, or may have two kinds of charge carriers in bipolar junction transistor devices. Compared with the vacuum tube, transistors are generally smaller and require less power to operate. Certain vacuum tubes have advantages over transistors at very high operating frequencies or high operating voltages, such as traveling-wave tubes and gyrotrons. Many types of transistors are made to standardized specifications by multiple manufacturers.

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Simplified operation

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Comparison with vacuum tubes

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