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Automated Elderly-Tracking Robot Prototype Using an AI-Based Vision Camera
(2026-01-01)
Pimpol, Jirapun
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Mongkolwai, Pratya
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Pukkalanun, Tattaya
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Tangsrirat, Worapong
This paper presents the design and implementation of an automated elderly-tracking robot prototype that integrates an AI-based HuskyLens vision sensor with ultrasonic sensors for target detection, tracking, and obstacle avoidance. Sensor data are processed by an Arduino UNO microcontroller, which controls TorqueNADO motors to achieve autonomous navigation and real-time motion control. The system also incorporates an ESP32-CAM module to provide live video streaming of the elderly user via the Blynk smartphone application, enabling remote monitoring over the Internet. In addition, the prototype supports a maximum payload of 3 kg for carrying essential lightweight items for elderly users. Experimental results demonstrate that the proposed robot meets the intended design objectives and validates the practical feasibility of the system.
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Dual-Mode Biquadratic Filter Employing Second-Generation Voltage Conveyors DM Biquadratic Filter Employing VCIIs
(2024-02-21)
Roongmuanpha, Natchanai
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Mongkolwai, Pratya
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Pukkalanun, Tattaya
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Tangsrirat, Worapong
In this paper, a dual-mode biquadratic filter is suggested. The proposed filter employs two Second-Generation Voltage Conveyors (VCIIs) along with four resistors and two capacitors. The suggested filter can realize all five standard biquadratic filter functions such as lowpass (LP), bandpass (BP), highpass (HP), bandstop (BS), and allpass (AP) in both voltage-mode (VM) and current-mode (CM) without needing to modify its circuit structure. The quality factor (Q) and natural angular frequency (ωo) can be accurately and separately controlled through the passive component. It additionally offers the capability of providing the output voltage at the low-output impedance terminal in VM. The effects of the VCII non-idealities on the filter performance have been analyzed in detail. The proposed filter also offers low active and passive sensitivity features. Simulation results achieved with PSPICE software using TSMC CMOS 0.18 μm parameter have been validated and compared with the theoretical findings.
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Circular Object Sorting Machine with LabVIEW Software Control
(2024-01-01)
Mongkolwai, Pratya
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Satansup, Jetsdaporn
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Dumawipata, Teerasilapa
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Nakroungsri, Teerapat
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Laotuy, Monthathip
This article describes a project to construct a circular object-sorting machine through the application of image-processing techniques. For the acquisition, processing, and transmission of data, LabVIEW (Laboratory Virtual Instrument Engineering Workbench) software is utilized. The operation of the sorting device is controlled by an Arduino microcontroller board, which is the Arduino Mega 2560. The project aims to efficiently separate circular objects by extracting color information, size measurements, and quantity data through image processing. The experimental results successfully demonstrate the sorting of circular objects and display color values, size measurements, and the number of sorted objects on an efficient LCD screen. The integration of LabVIEW and Arduino provides an effective solution for circular object sorting, aligning with the theoretical principles presented in the project.
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Floating Inductance Simulator with Electronic Tuning Property Using only Active Elements
(2023-01-01)
Roongmuanpha, Natchanai
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Mongkolwai, Pratya
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Pukkalanun, Tattaya
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Dumawipata, Teerasilapa
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Tangsrirat, Worapong
This paper discusses the active-only electronically tunable floating lossless inductance simulator, which uses a single fully balanced-voltage differencing buffered amplifier (FB-VDBA) and one operational amplifier (OA). For this implementation, only integrated circuit packages with no external passive components are utilized. The synthetic equivalent inductance value is electronically adjustable via the transconductance gain of the FB-VDBA. Non-idealities of the active element have produced their effects. Using PSPICE with TSMC 0.25-mum CMOS parameter and the LM741 type OA, the performance of the proposed circuit and its application as a second-order voltage-mode lowpass filter is demonstrated. The numerical simulations closely matched the theoretical results.
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Grounded Parallel RL, RC, and LC Immittance Simulators Using VDBAs and Passive Elements
(2022-01-01)
Mongkolwai, Pratya
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Moonmuang, Pitchayanin
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Pukkalanun, Tattaya
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Tangsrirat, Worapong
This communication suggests a grounded parallel RL, RC, and LC immittance simulator. In this circuit, two voltage differencing buffered amplifiers (VDBAs) with two passive components are proposed. The VDBA device's transconductance gain can be used to electronically adjust the realized equivalent resistance (Req), inductance (Leq), and capacitance (Ceq), which is conditional on the choice of the passive element. The effect of the VDBA's non-idealities on the realized simulator is studied in this research. The second order voltage mode bandpass filter is realized using the proposed active LC parallel simulator, which is simulated using the PSPICE simulation program to ensure that it operates as desired.
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DBTA-Based Voltage-Mode PID Controller Design
(2022-01-01)
Mongkolwai, Pratya
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Tangsrirat, Worapong
This paper deals with the design of a voltage-mode proportional-integral-derivative (PID) controller based on the use of differential-input buffered and transconductance amplifiers (DBTAs) as active components. Two DBTAs, four grounded resistors, and two grounded capacitors make up the designed voltage-mode PID controller. A closed-loop control system employing the suggested PID controller was explored to evaluate the performance of the proposed circuit. The proposed PID controller and its utilization in a closed-loop system were simulated with the PSPICE program using the built-in model parameters AD844 and L T1228.
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Novel Voltage-Mode PID Controller Using a Single CCTA and All Grounded Passive Components
(2022-01-01)
Mongkolwai, Pratya
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Tangsrirat, Worapong
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Suesut, Taweepol
A compact voltage-mode proportional-integral-derivative (PID) controller based on the utilization of a single current conveyor transconductance amplifier (CCTA) is presented in this paper. The presented active PID controller is made up of a single CCTA, and four truly grounded passive components, i.e. two resistors, and two capacitors. The design consideration of the controller parameters has been examined. Besides, the crucial sensitivity performances of the controller parameters for ideal and non-ideal conditions have also been discussed. An application on the closed-loop test system is demonstrated to validate the practicability of the proposed PID controller circuit. To confirm the theoretical behavior, the proposed circuit is simulated with the PSPICE program using TSMC 0.35-μm CMOS process technology. Experimental test results based on commercially available CFOA AD844 and OTA CA3080 integrated circuits are also provided to demonstrate the practicality of the proposed circuit.

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