Circuit diagrams are a key component to the inner workings of any electronic device. They use symbols to represent electrical components and how they interact with each other. Understanding the meaning of these symbols is integral to reading and troubleshooting circuit diagrams.
Whether you’re a professional electronics engineer, a student, a hobbyist, or just someone that wants to understand a circuit diagram better, you need to know the meaning of the different circuit diagram symbols used.
To help you out, today we’re going to break down some of the most common circuit diagram symbols and their meaning.
The first symbol is called a resistor. It’s used as a component to reduce current flow in a circuit. Resistor symbols can take on many shapes, but they all have two terminals extending from them. This symbol is also sometimes written as “R.”
The next symbol is a capacitor. This is used to store energy in a circuit by creating an electric field. Capacitors are usually shown with two terminals, and this symbol is often written as “C.”
The third symbol is an inductor. It is used to store energy through the creation of a magnetic field. Inductors have one or two terminals and the symbol is often written as “L.”
Moving on, the fourth symbol is a diode. This is a semiconductor device that is used to convert AC voltage into DC voltage. Diodes have two terminals, and the symbol is typically written as “D.”
The fifth symbol is a transistor. This is a three-terminal device used to amplify or switch electrical signals. The transistor symbol looks like a triangle with a line going through it. This symbol is often written as “Q.”
The sixth symbol is a switch. This is used to turn a circuit on and off. Switches have two terminals, and this symbol is typically written as “S.”
The seventh and final symbol is an LED. This is a light emitting diode that converts electrical energy into light. LEDs have two terminals, and this symbol is often written as “LED.”
We hope this guide has helped you better understand the meaning of circuit diagram symbols and how they interact in a circuit. Taking the time to learn these symbols will give you a better understanding of how circuits work, and will make troubleshooting any circuit easier.
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