Use of Electrical Symbols to Design Circuits

Use of Electrical Symbols to Design Circuits

Understanding Electrical Symbols

  • Cell: It’s a source of electrical energy with a positive (+) and a negative (-) terminal. A single cell is often referred to as a battery, but technically a battery is two or more cells joined together.
  • Battery: This is a combination of two or more cells.
  • Switches: Switches can either be open (not passing current) or closed (passing current).
  • Lamp: This represents the output device in your circuit which are usually light bulbs.
  • Resistor: A resistor limits the flow of electric current. It could be a specific component like a lamp or a motor, or a standalone resistor used to control current.
  • Capacitor: Stores electrical charge and releases it when needed.
  • Diode: This allows current to flow in one direction only.
  • LED (Light Emitting Diode): A specific type of diode that emits light when current passes through it.
  • Transistor: Acts as a switch controlled by electric signal. Common in amplifying circuits.
  • Fuse: Designed to melt and ‘break’ the circuit if the current flowing through it is too high, providing safety.

Designing Circuits

  • Series Circuits: Components are connected end-to-end, so there’s only one path for the current to take.
  • Parallel Circuits: Components are connected side by side, providing multiple paths for the current.

Function of Electrical Symbols

  • Symbols are a universal language. They allow anyone who understands circuitry to interpret represented circuits.
  • This helps in troubleshooting and fixing electrical problems.

Drawing Circuits

  • When drawing circuits, lines represent wires while symbols represent components.
  • The layout of drawn circuits can help in identifying a problem in the circuit.
  • Drawings must be neat and organized, making sure that the layout is logical.
  • Always use a ruler for drawing straight lines.

Understanding the symbols and the rules for drawing circuits is crucial for both circuit design and troubleshooting.