Capacitors
Capacitors are one of the three fundamental passive electronic components, along with resistors and inductors. They store electrical energy in an electric field and are widely used for filtering, energy storage, timing, coupling, decoupling and signal processing. From tiny ceramic capacitors found in smartphones to large electrolytic capacitors used in power supplies and audio amplifiers, capacitors are essential in almost every electronic circuit.
What You'll Learn
Capacitor Basics
Capacitor Types
Specifications
Capacitor Circuits
Applications
Why Capacitors Are Important
Capacitors perform many essential functions in electronic circuits. They can smooth rectified voltages, block DC while allowing AC signals to pass, stabilise power supplies, filter unwanted noise, store energy, create timing delays and form resonant circuits with inductors. Whether you are repairing an amplifier, designing a switch-mode power supply or building an Arduino project, understanding capacitors is essential.
Popular Tutorials
- How Capacitors Work
- Electrolytic Capacitors
- Ceramic Capacitors
- Capacitors in Series and Parallel
- Charging and Discharging Capacitors
- Testing Capacitors with a Multimeter
- Using an ESR Meter
- Replacing Electrolytic Capacitors
- Capacitors in Audio Amplifiers
- Capacitors in Power Supplies
Learning Path
- What Is a Capacitor?
- How Capacitors Work
- Capacitance and Units
- Types of Capacitors
- Voltage Rating and Tolerance
- Series and Parallel Connections
- RC Circuits and Time Constants
- Filtering and Power Supplies
- Testing and Troubleshooting
- Choosing Replacement Capacitors