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Objectives of the Study. Project design. Project Design.

Objectives of the Study. Project design. Project Design.

DEVELOPMENT OF ANALOG COMMUNICATION TRAINER A Research Project Presented to the Faculty of the Industrial Technology Technological University of the Philippines CQT Avenue, Salawag, Dasmariñas City, Cavite By JAY PEE M. DIAZ MARJO L. MATIAS ELLEN MARIE B. PEREZ In partial fulfillment for the requirements for the Degree Bachelor of Engineering Technology.

Project Description The Analog Communication Trainer was designed and fabricated to provide a convenient and portable trainer for electronics engineering students. Some students cannot completely comprehend the lessons due to the lack of equipment in the university. The prototype was developed to provide a solution for the dearth of electronics equipment and will help the students to learn hands-on laboratory exercises. The fabricated design of the prototype is illustrated in Figure 17. The device is user-friendly and makes it possible to construct analog circuits as well as any circuits that the students were assigned to test..

Objectives of the Study The main objective of the study is to design and develop a cost-efficient prototype considering the factors in designing an Analog Communication Trainer. Specifically, this study aims to: Design an Analog Communication Trainer with the following features: Portable casing to consolidate components. Can carry out 5 experiments in the field of communication. Test the prototype in terms of functionality and accuracy and provide exercises manual Evaluate the project in terms of functionality, aesthetics, workability, durability, economy, and safety to obtain a descriptive rating of very acceptable with a mean of at least acceptable in any criteria..

This study focuses on designing a cost-efficient basic tool for carrying out experiments in the field of communication for Technical Colleges & Engineering Universities undergraduate and graduate courses specifically at Technological University of the Philippines- Cavite Campus. Design, dimensions, features, capacity and supply of the components to be used are also considered and discussed. The researchers arrived at this solution to help the students enrolled on Electronics engineering Technologies at their University to design a developed analog communication trainer and will simultaneously help the subject instructors to teach lessons fast and able to finish the syllabus. In line with this, it will also help the objective of the University to provide higher and advanced vocational, technical, industrial, technological. The researcher will make the appropriate size considering the factor of its costing which should be cheaper than the existing. Also, this can be a guide for other researchers in the future. It will be designed as an attaché-case style for quick, easy to carry, adjustable, and comfortable to look at. In the fabrication of this project, help, and advice from their adviser will be constantly consulted as soon as it will be fabricated correctly and in accordance with the objectives such as to be able to work and help students and for those who will use it in the future..

Project design.

Project Development. Materials that needed PCB Etching Making a hole onto the PCB using a drill bit..

Operation Procedure These are the procedure and reminders needed to follow considering the trainers’ functionality, workability, safety, and its maintenance in order to use the trainer efficiently: Before using, check all the parts, especially the wires since it is the conductor of electricity. Make sure that no tears or cuts on its insulation. In using the trainer, place it on a wide, flat, and smooth surface to avoid breakage, scratches, or any deformities on its casing. Store the trainer properly and carefully in a safe place when not in use. Lift the trainer with a tight grip on its handle. Check the adapter power supply before using it. Plug the power supply on the trainer carefully and make sure that it is properly plugged in..

Testing Procedure The testing of an analog communication trainer is conducted to examine the capabilities and limitations of the prototype. There are various ways to test the operation and functionality of the most typical way of a testing procedure. The functionality testing procedure is done through the following steps: Functionality Test of every circuits Am Modulator 2. Amplifier 3. Antenna Matching 4. Limiter 5. Phase Detector 6. If Filter and 7. Demodulator Accuracy test of every circuits Am Modulator 2. Amplifier 3. Antenna Matching 4. Limiter 5. Phase Detector 6. If Filter and 7. Demodulator.

Evaluation Procedure The Technological University of the Philippines Evaluation Instrument for Developed Prototype will be used to determine the acceptability of the Analog Communication Trainer with the following criteria: Functionality, Aesthetic, Workability, Durability, Economy, and Safety. The following is the list of steps undertaken: Evaluation forms will be distributed to thirty (30) students ,10 1 st year,10 2 nd year, and 10 3 rd year Students of Technological University of the Philippines Cavite - Campus. After explaining the details, the respondents will rate the product for the above-mentioned criteria based on the Likert Scales as shown in Table 15. One (1) being the lowest (Poor/Not Acceptable) and five (5) being the highest (Excellent/Highly Acceptable); Evaluation results are to be tabulated to compute for the mean of each criterion and the overall mean respectively;.

Project Structure. AM Modulator Circuit Amplifier Circuit Antenna Matching Network Circuit.

Project Test Results Several tests were performed on the prototype to determine the functionality of the various circuits, including the AM Modulator The sinewave, square wave, and triangular wave were modulated. The carrier signal has constant frequency of 1KHz and voltage of6Vpp. The message or information signal has constant frequency of 1MHz and 10mVpp voltage., Amplifier A sinewave with 5Vpp input voltage has an expected value of output voltage which ranges from 5Vpp to 15Vpp. The result shows that the measured value of output voltage is 13.8Vpp which is within the range of the expected value and proves that the input voltage has been amplified. , Antenna matching network the functionality test was carried out by comparing the expected and measured values of input and output impedances. , Limiter The measured values for the sinewave, square wave, and triangle wave are all 240mVpp, which is within the expected range. , Phase detector the first instance has a frequency of 100kHz and a voltage of 2 volts. The measured frequency was 99.90kHz, which was close to the expected value of 100kHz, and the voltage was 20mVpp, which was also close to the expected value. , IF filter with Envelope detector The measured value of 256mVpp is less than the input value which means that the signal is filtered and the IF Filter for Prototype 1 is fully functional. , and Demodulator the result shows that the measured value is as close as the expected value of frequency that should be recovered which means that the demodulator.

Project Capabilities and Limitation This section presents the overall performance and capabilities of the research project Analog Communication Trainer with this limitation as well as test result. The following are the capabilities of the project: The device can modulate the signals from the carrier and message signals from the inputs which is coming from the signal generator. The device can increase the power of the input signal which can be found in Amplifier circuit. The limiter circuit board which is included in the prototype can flatten input signals such as sinewave, square wave and triangle wave. The device can demodulate a signal by restoring the information signal to the demodulated wave. The following are the limitations of the project: The device is limited to using analog signals for inputs. Unlike the trainer which can be found in the market, the device does not have SSB transmitter, mixer, calibration circuit, quadrature detector. The device is limited to only seven circuit..