Circuit Diagrams
Circuit Diagram
Circuit diagrams are visual representations of electronic circuits, using symbols for components and lines to show connections.
- Clarity: Simplifies complex circuits for easy understanding.
- Standardisation: Uses universal symbols for global comprehension.
- Efficiency: Allows quick identification of components and their functions.
Circuit diagrams are like blueprints for electronic systems, providing a clear and concise way to visualize how components are connected and interact.
NoteIEC vs ANSI
- Most of the circuit diagrams in this course use IEC (International Electrotechnical Commission) symbols, which are the international standard.
- These are widely used in Europe and around the world.
- You might occasionally see ANSI (American National Standards Institute) symbols, especially in resources from the United States.
Key Components and Their Symbols
Fixed Resistor
Resistor
An electronic component that limits or controls the flow of electric current in a circuit.
Variable Resistor
Variable resistors
Variable resistors are components that allow you to adjust the resistance in a circuit.
Capacitors
Capacitor
An electronic component that stores and releases electrical energy by holding an electric charge between two conductive plates.
Switches
Switch
An electrical component that is used to connect or disconnect the flow of electricity in a circuit, allowing control over whether the circuit is on or off.
Relays
Relay
An electronic switch that is activated by a current or signal to open or close another circuit, allowing a low-power signal to control a high-power circuit.
Diodes
Diode
An electronic component that allows current to flow in only one direction, acting like a one-way valve in a circuit.
