Republic of the Philippines
Commission on Higher Education
Region V (Bicol)
BICOL UNIVERSITY - POLANGUI
Polangui, Albay
COMPUTER
ENGINEERING DRAFTING
& DESIGN, LAB
Jerome M. Calpe
CpE 3A
Engr. Ronnie Macasinag
Professor
Republic of the Philippines
Commission on Higher Education
Region V (Bicol)
BICOL UNIVERSITY - POLANGUI
Polangui, Albay
TOPIC: Block Diagram, Flow Chart and Electrical, Electronic & Logic Components
ACTIVITY 1: The following questions have been designed to test the objectives identified for the module:
1. In a design project, why it is important to create a block diagram?
- A block diagram is important in a design project because it provides a clear and simplified
representation of a complex system. It shows the overall structure and flow of data, signals, or processes
without going into unnecessary details of each component. By using blocks and connecting lines,
engineers and designers can easily visualize how inputs are processed and converted into outputs. This
helps in identifying the relationship between different components, clarifying the workflow, and
detecting possible issues early in the design stage. Moreover, block diagrams make it easier to
communicate ideas and designs to others, including those who may not be experts in technical details,
such as clients, team members, or instructors. In summary, block diagrams serve as a roadmap for
system design, analysis, and troubleshooting.
2. What are the three parts of computer system?
- Input Devices – These are the components used to enter raw data and instructions into the computer.
Example: keyboard, mouse, scanner, and microphone
- Central Processing Unit (CPU) – This is the “brain” of the computer, consisting of the Arithmetic Logic
Unit (ALU) for performing calculations, the Control Unit (CU) for directing operations, and
registers/memory for temporary storage.
- Output Devices – These components convert processed data into human-readable form.
Example: monitor, printer, and speaker
3. Describe the components of computer system flow from the input, process and output. Identify the
input, process and output.
Input (Input Devices): At this stage, raw data and user instructions are entered into the system
through devices like a keyboard, mouse, scanner, or microphone. These devices act as the
communication bridge between the user and the computer.
Example: Typing a document through a keyboard or giving a voice command through a microphone.
Process (CPU & Memory): The Central Processing Unit (CPU) processes the input data. The
Control Unit (CU) interprets instructions, the Arithmetic Logic Unit (ALU) performs necessary calculations
and logical comparisons, and memory stores both temporary and permanent data.
Example: The CPU interprets typed characters, stores them in memory, and applies formatting commands
given by the user.
Output (Output Devices): The processed information is delivered to the user in a readable form.
Devices such as monitors, speakers, or printers convert digital signals into human-readable results.
Example: The typed document appears on the monitor screen or is printed on paper.
Republic of the Philippines
Commission on Higher Education
Region V (Bicol)
BICOL UNIVERSITY - POLANGUI
Polangui, Albay
Laboratory Activity No. 1: Block Diagram of Audio Amplifier
Components:
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•
•
•
•
Microphone
Power Amplifier
Pre-Amplifier
Loudspeaker
Tone and Volume Controls
Illustration:
Result:
Explain the flow of the audio amplifier block diagram and describe the relationship of each component
of audio amplifier.
The flow of the audio amplifier starts when the microphone picks up weak sound signals and
converts them into small electrical signals. These weak signals are then passed into the pre-amplifier,
which boosts them to a sufficient level for further processing. The output from the pre-amplifier goes
through the tone and volume control section, where the user can adjust sound quality and loudness.
Afterward, the signal is sent to the power amplifier, which amplifies the signal to a much higher power
level capable of driving the loudspeaker. Finally, the loudspeaker converts the amplified electrical signal
into audible sound waves.
Conclusion:
In conclusion, the audio amplifier system demonstrates how weak sound signals can be strengthened
and controlled for practical use. Each component plays an important role: the microphone serves as
input, the amplifiers boost the signal, the tone/volume controls modify the sound quality, and the
loudspeaker outputs the final amplified sound. The relationship among these blocks ensures that sound
is not only made louder but also clearer and more suitable