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I Gusti Agung Putu Raka Agung, I Gusti Agung Putu
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Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering

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PENERAPAN SENSOR CJMCU101 UNTUK MENDUKUNG SISTEM SMART LECTURE ROOM Maisha Putra, I Gusti Agung Ngurah; Andika Pranata, I Kadek; Paramitha Sekar Putri A.P., Ni Made; Sukadarmika, Gede; Raka Agung, I Gusti Agung Putu; Purnama, Fajar; Indra ER, Ngurah
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p22

Abstract

This study presents the design of a Smart Lecture Room system that utilizes light intensity sensors, specifically CJMCU101. These sensors are installed in each classroom to monitor the ambient conditions. The implementation of the designed system was carried out in the classrooms of the Udayana University Electrical Engineering Study Program. To achieve this goal, the classroom utilized by the Electrical Engineering Study Program of Udayana University was divided into two classes (DH101 and DH102) and a sensor was installed in each class as an IoT device. The IoT devices are connected to a Raspberry Pi Access Point, where the data from the sensors is stored and monitored using the Thinger.io platform. The validation of the sensor testing is carried out by comparing the results obtained from the sensors with the results obtained from a thermohygrometer measurement. This research produces a prototype smart lecture system, applied to a classroom mockup, that employs IoT devices, sensor databases, and sensor monitoring. The data from each sensor's detection is stored in the LAMP database, which employs Linux, Apache, MySQL, and PHP. The Thinger.io platform monitors the values of each sensor. A variation in accuracy between the sensor and measuring instrument results in a difference in their values. The CJMCU101 light intensity sensor has an average accuracy of 93.48% compared to the measuring instrument on DH101. The average accuracy of the sensor value compared to the measuring instrument on DH102 is 95.96%.
RANCANG BANGUN SISTEM PENGEMUDIAN ELEKTRIK PADA MOBIL LISTRIK AGNIJAYA WEIMANA Mustika Wiyasa, I Kd; Satya Kumara, Nyoman; Raka Agung, I Gusti Agung Putu
Jurnal SPEKTRUM Vol 10 No 4 (2023): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/SPEKTRUM.2023.v10.i04.p23

Abstract

Electric energy can be used as a substitute for oil fuel. One of the efforts to address air pollution is through the Energy-Efficient Car Contest (KMHE), which emphasizes vehicle efficiency. In this study, the electric propulsion system in the electric car WEIMANA, which focuses on the selection of an electric motor, conducted tests on a BLDC motor to determine the required power of the BLDC motor. In the selection of the electric motor, calculations were made for rolling resistance, aerodynamic resistance of the car, power, and required torque. Based on the discussion's results, the chosen motor is the qs-motor brand with a capacity of 800 W, 500 RPM, torque of 80 Nm, and operating voltage of 48 – 70 VDC. The magnitudes of rolling resistance, aerodynamic resistance of the car, power, and torque are 16.67 N, 7.83 N, 864.7 W, and 59.22 Nm, respectively. The selected motor has been able to propel the WEIMANA car with driver weights of 45 kg, 55 kg, and 65 kg at speeds of 20 km/h and 30 km/h. The highest average power efficiency of the controller is 90.31% with a driver weight of 55 kg. The highest average power efficiency of 88.03% is achieved at a speed of 20 km/h.
Co-Authors Andika Pranata, I Kadek Fajar Purnama Gede Sukadarmika I N Satya Kumara Maisha Putra, I Gusti Agung Ngurah Mustika Wiyasa, I Kd Ngurah Indra ER Paramitha Sekar Putri A.P., Ni Made