Yazar "Asadi, Farzin" seçeneğine göre listele

Listeleniyor 1 - 20 / 64
  • Küçük Resim Yok
    Yayın
    Amazon Web Services and MicroPython Based ECG Monitoring System
    (Institute of Electrical and Electronics Engineers Inc., 2023) Mert, T.U.; Asadi, Farzin
    With the development of wearable sensor technologies, traceability of sports and health data has become widespread. Electrocardiography (ECG) is an important data in the detection of heart diseases and is a graphical representation of the electrical events occurring in the human heart. In this study, real-time transfer of ECG data to the cloud environment was performed with MicroPython using the ESP32 family microcontroller. MicroPython allows complex operations such as machine learning to be performed on microcontrollers with low processing power. Despite this, it seems that the number of studies conducted with MicroPython in the literature is still limited. In this study, after the ECG signal was cleared of noise with the designed software filters, the data was directed to the Amazon Web Services (AWS) cloud environment. Message Queuing Telemetry Transfer (MQTT) protocol is used for instant transmission of data to the cloud environment. In addition, ECG data was read from the cloud environment and graphs were drawn with the Python code developed on the computer. Analysis of the ECG signal was performed using available libraries. © 2023 IEEE.
  • Küçük Resim Yok
    Yayın
    Analog to Digital Conversion and Timer
    (Springer Nature, 2022) Asadi, Farzin; Pongswatd, S.
    [No abstract available]
  • Küçük Resim Yok
    Yayın
    Analog-to-Digital and Digital-to-Analog Converters
    (Springer Nature, 2024) Asadi, Farzin
    An Analog-to-Digital converter (ADC or A/D or A-to-D) is a system that converts an analog signal (i.e., a sound picked up by a microphone), into a digital signal. A digital-to-analog converter (DAC, D/A, or D-to-A) is a system that converts a digital signal into an analog signal. This chapter studies the analog to digital and digital to analog conversion and related ICs. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Applied numerical analysis with MATLAB®/Simulink®
    (Springer Cham, 2023) Asadi, Farzin
    This textbook provides a compact but comprehensive treatment that guides students through applied numerical analysis, using MATLAB®/Simulink®. Ideal as a hands-on source for courses in Numerical Analysis, this text focuses on solving problems using market-standard software, corresponding to all key concepts covered in the classroom. The author uses his extensive classroom experience to guide students toward deeper understanding of key concepts, while they gain facility with software they will need to master for later studies and practical use in their engineering careers.
  • Küçük Resim Yok
    Yayın
    Basics of Simulink®
    (Springer Nature, 2022) Asadi, Farzin; Pongswatd, S.
    [No abstract available]
  • Küçük Resim Yok
    Yayın
    Circuit Theorems
    (Springer Nature, 2023) Asadi, Farzin
    This chapter studies the Kirchhoff’s laws, Nodal/Mesh analysis, Thevenin’s theorem and maximum power transfer theorem. You will see that aforementioned tools are really correct. This chapter contains 5 experiments. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Commonly Used Labaratory Equipmentes
    (Springer Nature, 2023) Asadi, Farzin
    This chapter studies the most commonly used devices in the laboratory. Measurement devices that are used in different laboratories are made by different companies. Working with each device has its own details. Therefore, you are encouraged to read the user manual of devices that you will use during the experiments. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Commonly Used Laboratory Equipment
    (Springer Nature, 2024) Asadi, Farzin
    This chapter studies the most commonly used devices in the laboratory. Measurement devices that are used in different laboratories are made by different companies. Working with each device has its own details. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Control of DC Motors
    (Springer Nature, 2024) Asadi, Farzin
    A DC motor is an electrical motor that uses direct current to produce mechanical torque. Control of DC motors (i.e., control of shaft speed or position) is relatively easy. This makes the DC motors a good choice for many applications. This chapter shows how speed and direction of rotation of a permanent magnet brushed DC motor can be controlled. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Counter Circuits
    (Springer Nature, 2024) Asadi, Farzin
    Counter is a logic circuit made up of a series of flip-flops that are used to count the number of inputs in the form of negative or positive edge transitions. The counter is classified into synchronous and asynchronous counters. The difference between the synchronous and asynchronous counter can be identified according to the flip-flops that are triggered. A Synchronous counter is the counter in which the clock input with all the flip-flops uses the same source and produces the output at the same time. If the flip-flops do not receive the same clock signal, then that counter is called as Asynchronous counter. In Asynchronous counters, the clock pulse is applied only to first flip-flop. The remaining flip-flops receive the clock signal from output of its previous stage flip-flop. The synchronous counter provides a more reliable circuit for counting purposes, and for high-speed operation, as the clock pulses in this circuit are fed to every flip-flop in the chain at exactly the same time. Synchronous counters therefore eliminate the clock ripple problem, as the operation of the circuit is synchronized to the clock pulses, rather than flip-flop outputs. This chapter focused on the counters. You will learn how to make and test different types of counters in this chapter. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Current Sources and Differential Pair
    (Springer Nature, 2023) Asadi, Farzin
    Current source and differential pair are two important circuits with many applications. For instance, transistors inside of an Integrated Circuit (IC) are biased with the aid of current sources and input stage of an Op amp is a differential amplifier. This chapter studies important current source circuits and BJT based differential pair. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    DC-DC Converters
    (Springer Nature, 2024) Asadi, Farzin
    DC-DC converters take a DC voltage as input and generate a different DC voltage (i.e., a DC voltage that is bigger or smaller than input) as output. This chapter studies some of the important DC-DC converter circuits. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Delay Circuits
    (Springer Nature, 2024) Asadi, Farzin
    Sometimes you need to turn on/off a load with a certain delay after a specific event. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Design of a Single Inductor LED Sink Driver Employing a Negative Hybrid Cockcroft-Walton/Dickson Multiplier
    (Ieee, 2021) Eguchi, Kei; Shibata, Akira; Ishibashi, Takaaki; Asadi, Farzin
    For a lithium-ion battery input, a new LED (Light-Emitting Diode) sink driver with a single inductor is presented in this paper. Unlike existing LED sink drivers, the proposed driver consists of a negative hybrid Cockcroft-Walton/Dickson multiplier and a buck-boost converter. By connecting the negative hybrid Cockcroft-Walton/Dickson multiplier to the buck-boost converter in series, the proposed topology can provide not only a higher voltage gain but also smaller component count and simpler switching control. To confirm the effectiveness of the proposed topology, theoretical analysis, computer simulations and experiments were performed regarding the simplest proposed driver realizing 8 times gain. Furthermore, the comparative analysis clarified that the proposed driver can provide higher power efficiency and smaller component counts than conventional drivers.
  • Küçük Resim Yok
    Yayın
    Design of an Inductor-less Step-Down AC/AC Converter Combined with a Symmetrical-Type Converter and Ladder-Type Converters
    (Institute of Electrical and Electronics Engineers Inc., 2020) Eguchi, K.; Asadi, Farzin; Ishibashi, T.; Oota, I.
    In this paper, a new inductor-less step-down ac/ac converter is designed by using switched-capacitor (SC) techniques. Unlike existing inductor-less ac/ac converters, the proposed ac/ac converter consists of ladder-type converters nested in a symmetrical-type converter. In the proposed ac/ac converter, the $1/4\times$ voltage gain is achieved by converting an ac input twice by the symmetrical-type converter and the ladder-type converters. The proposed new topology enables to reach not only high power efficiency but also high input power factor. To evaluate the characteristics of the proposed ac/ac inverter realizing the $1/4\times$ voltage gain, we conducted theoretical analysis and simulation program with integrated circuit emphasis (SPICE) simulations. The SPICE simulation results demonstrated that the proposed ac/ac converter can achieve about 84% power efficiency and 0.88 input power factor when the output power is 200W. © 2020 IEEE.
  • Küçük Resim Yok
    Yayın
    Design of an LED sink driver using a switched-inductor and switched-capacitor buck-boost converter with high voltage gains
    (Institute of Electrical and Electronics Engineers Inc., 2020) Eguchi, K.; Shibata, A.; Asadi, Farzin; Ishibashi, T.; Harada, Y.; Oota, I.
    A novel light emitting diode (LED) sink driver using a switched-inductor and switched capacitor (SISC) buck-boost converter is proposed in this paper. The proposed LED driver can achieve a high voltage gain by cascading the SI buck-boost block and the SC doubler block with a flying capacitor. The proposed negative SISC topology can provide not only high voltage gain but also flexible controllability of LED currents. The performance of the proposed SISC buck-boost converter was clarified by simulation program with integrated circuit emphasis (SPICE) simulations. In the performed simulations, the proposed SISC buck-boost converter can improve power efficiency about 6% from the conventional hybrid buck-boost converter when the duty factor D is 0.5 and the output power is 500mW. Furthermore, the feasibility of the proposed SISC topology was confirmed by breadboard experiments. © 2020 IEEE.
  • Küçük Resim Yok
    Yayın
    Design of PLC-based system for linearity output voltage of AC-DC converter
    (Elsevier, 2022) Pongswatd, Sawai; Smerpitak, Krit; Asadi, Farzin; Thepmanee, Teerawat
    This paper presents the PLC-Based system for controlling the SCR power module which is AC-DC converter proposes to linearity output voltage with trigger signal. The technique converted the trigger signal by arccosine function and analog module in the PLC. Converted signal from PLC system is fed to SCR power module instant the traditional signal. Proposed of this paper describes the PLC hardware configuration, compute/math and trigonometric functions with Studio 5000 software. In addition, the interfacing, parameters configuration, and monitoring are considered for testing. The technique with PLC-based, devices configuration and experimental results have been presented will be useful for electric power supply in the industry with more and more demand to apply the PLC system to develop the traditional industry to semi or automatic control in the industry. (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
  • Küçük Resim Yok
    Yayın
    Different Types of Switches
    (Springer Nature, 2024) Asadi, Farzin
    In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Digital Arithmetic
    (Springer Nature, 2024) Asadi, Farzin
    This chapter shows how basic arithmetic operations can be done with digital ICs. Adder, multiplier and magnitude comparator circuits are studied in this chapter. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.
  • Küçük Resim Yok
    Yayın
    Digital Multi Meter
    (Springer Nature, 2023) Asadi, Farzin
    This chapter focused on Digital Multi Meter (DMM) which is one of the important tools in the laboratory. This chapter shows how to measure the internal resistance of the DMM in the voltage/current measurement mode, how to measure the test current of a DMM in resistance measurement mode, how to determine whether the device is a True RMS device and how to obtain the frequency response of your DMM. This chapter contains 7 experiments. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.