When you are trying to understand the basics of electronics, the first thing you must learn is how to make the circuits work up easily. If an electronic circuit is connected to many devices then it becomes very complicated. This type of circuit and its operation might become a little difficult to understand.

For that purpose, we can use the Electronics Block Diagrams for better understanding.

The electronic block diagrams show the design of a complete circuit very clearly. Then we can divide them into sections or blocks. Each block describes a specific function and it is connected.

The components used in the block are not displayed mostly. Only input and output are shown.

Electronics Block Diagrams

When you look at such a diagram, it’s easier to understand or design an entire system.

Oh, I almost forgot to mention that usually a power source or battery is not shown in the circuit diagram.

If you find this diagram a bit difficult to understand, let us show you another example of a block diagram of many circuits.

Audio Amplifier System in Electronics Block Diagrams 

Block Diagram of Radio Receiver System

  • The Microphone: converts sound signals into electrical signals (voltage)
  • Pre-Amplifier: increases the low level (voltage) signal from the microphone into a higher level signal.
  • Tone and Volume Controls: They are used to adjust the audio. Tone controls adjust the high frequency (Treble) and low frequency (Bass). The volume adjusts the level of loudness of sound.
  • Power Amplifier: will increase the audio signal power up.
  • The Loudspeaker: converts electrical signals to sound.

Radio Receiver System

Audio Amplifier System

  • Antenna: serves to receive radio signals from various stations.
  • Tuner: selects only one radio station.
  • Detector: extracts the sound signal from the carrier wave that comes with the radio signal.
  • Audio Amplifier: it will amplify the audio signal to high power.
    (This part may be divided into more blocks, like the amplifier system above.)
  • Loudspeaker: converts electrical signals into sound

Regulated Power Supply System

  • Transformer: reduces the voltage from AC 220 volts to a low voltage AC.
  • Rectifier: converts AC to DC voltage. But it is DC voltage that is not smooth and has a high ripple.
  • Smoothing: filters DC power to be smooth to reduce the ripple to low.
  • Regulator: eliminates ripple signal, regulates DC output to be stable.

Feedback Control System

  • Sensor: A converter that converts the controlled state into electrical signals.
  • Selector (control input): Selects the desired condition of the output. Normally it is a variable resistor.
  • Control Circuit: Compares the desired conditions from the control input and sensor of the controlled quantity and sends the appropriate signal to the output transducer.
  • Output Transducer: converts electrical signals to control volume.
  • Controlled Quantity: Normally it is not the electricity quantity, but the quantity of speed such as motor speed.
  • Feedback Path: This is not an electric current in normal cases. The sensor will detect the state of the controlled quantity.

Thank you credit source: Block Diagrams by John Hewes

How is your understanding now? Do you understand the electronics block diagrams better now? I definitely want to help you. You can read more.

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