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All Journal JTET (Jurnal Teknik Elektro Terapan) BANGUN REKAPRIMA JOIV : International Journal on Informatics Visualization FaST : Jurnal Sains dan Teknologi
Bambang Supriyo, Bambang
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Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Other

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Pengubah Pulsa Digital ke Tegangan untuk Sensor Kecepatan Putaran Berbasis Mikrokontroller Arduino Sayekti, Ilham; Supriyo, Bambang
JTET (Jurnal Teknik Elektro Terapan) Vol 3, No 1 (2014)
Publisher : Teknik Elektro - Politeknik Negeri Semarang

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Abstract

Pengubah Pulsa Digital ke Tegangan Untuk Sensor Kecepatan Putaran Berbasis Mikrokontroller Arduino adalah alat yang dirancang sebagai sensor putaran yang keluarannya adalah tegangan yang merepresentasikan dari jumlah putaran yang dinyatakan dalam rpm (Rotasi per Menit). Dengan menggunakan metoda penelitian berupa rancang bangun, sistem yang dibangun terdiri dari Mikrokontroller Arduino dan IC Digital to Analog Converter (DAC) seri MPC4921. Proses pengubahan pulsa digital menjadi tegangan dilakukan oleh Mikrokontroller Arduino melalui pemrograman pada Arduino, dengan cara pulsa-pulsa digital, dapat dari putaran motor, dan lainnya, diterima sebagai masukan oleh Arduino. Selanjutnya melalui program, pulsa-pulsa tersebut diubah menjadi data digital. Data digital tersebut selanjutnya diubah menjadi tegangan analog oleh Digital to Analog Converter (DAC) yang nilainya sebanding dengan jumlah putaran. Pengujian alat dilakukan dengan menggunakan jumlah pulsa per putaran (pulse per revolution, ppr) yang berbeda, antara lain 1 ppr sensor, 6 ppr sensor dan 60 ppr sensor dan 360 ppr sensor untuk setiap nilai rpm yang berbeda. Selanjutnya data tersebut diubah menjadi tegangan analog yang hasilnya dibaca melalui voltmeter digital. Dari hasil pengujian yang dilakukan untuk setiap jumlah ppr terhadap putaran rpm per satuan tegangan (volt), dengan data pengujian sebanyak 60 diperoleh nilai kesalahan sebesar 0,13%.
Pengembangan Alat Uji Komposisi Massa pada Logam Paduan Biner Menggunakan Sensor Load Cell dan Sensor Jarak Tipe Laser Slamet, Agus; Supriyo, Bambang; Putro, Wahju Djalmono
JTET (Jurnal Teknik Elektro Terapan) Vol 6, No 2: (Agustus 2017)
Publisher : Teknik Elektro - Politeknik Negeri Semarang

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The objective of this research is to develop and to test the prototype of equipment for testing the mass composition of a binary alloy metal. During testing, the alloy metal is placed inside the glass vessel filled with the liquid fluid, therefore the metal experiences a fluid pressure called as buoyancy. The mass composition of the alloy metal is determined based on the measurement of mass and volume of the alloy metal electronically. The mass of the alloy metal is measured using a load cell based electronic scale, while the volume of the alloy metal is indirectly determined based on the difference in fluid surface levels measured using a laser distance sensor before and after the alloy metal is dipped inside the fluid. The surface area of the glass vessel is always constant, therefore the volume of the fluid displacement which represents the volume of the alloy metal can be calculated using the standard volume formula. Three types of alloy metals with various compositions of Sn (70-80%) and Pb (15-30%) elements are used in this experiment. The experimental results show that the percentage differences in mass composition of the alloy metals measured using this equipment prototype are about  0,05% -11,76%.  The error percentage is bigger as the percentage composition of Sn element increases and the percentage composition of Pb element  decreases. This considerably error might be caused by the use of less precise laser distance sensor with thefinest detection of only about 1,01 mm in resolution.  A further research based on the use of more precise laser sensor with about 0.01 mm in resolution needs to be conducted to significantly  improve the quality measurement of the mass composition of the binary alloy metal.Keywords:  binary alloy, laser distance sensor, load cell. mass composition 
Rancang Bangun Sensor Cahaya Pendeteksi Api Pada Robot Cerdas Pemadam Api Politeknik Negeri Semarang Supriyo, Bambang; Sayekti, Ilham
JTET (Jurnal Teknik Elektro Terapan) Vol 6, No 3: (Desember 2017)
Publisher : Teknik Elektro - Politeknik Negeri Semarang

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Light sensor for fire detection has a significant role in Inteligent Fire Fighting Robot, because the detection result of the sensor is used to detect the availabilty of the fire source (candle light) in a room. If the fire is detected, then the robot will move to the fire source and finally extinguish the fire. A photo transistor which is sensitive to infra red light is used as the sensor.  The objective of the research is to test the photo transistor circuit and  to observe the voltage response of the emitter pin of the photo transistor with respect to the fire for various distances from 10 cm to 100 cm.  The collector pin of the photo transistor is connected to +5 Volt power supply, while the emitter part is connected to ground via the emitter resistor (Re).  The emitter voltage of the phoro transistor is read via Analog Input Pin A0  of Arduino UNO. This voltage represents the strength level of the fire detected by the photo transistor.  The data communication between Arduino UNO and computer is serially established via USB port. The data logging process is performed using Matlab/Simulink. Arduino UNO microcontroller is used to process the data such that the correlation between the sensor voltage and the sensor distance from the fire source can be identified.  Theexperimental results show that the use of emitter resistor (Re) 10 kOhm has the best voltage response with respect to the fire source for the distance of 10 cm to 60 cm, compared to Re = 4k7 Ohm  (for distance from 15 cm hingga 30 cm) and Re = 22k Ohm (for distance of 10 cm hingga 35 cm).  As a result, the combination of photo transistor and resistor (Re) of 10 kOhm can be applied for fire detection circuit for the distance up to 60 cm.Keywords : arduino uno, photo sensor, fire sensor
A Low-Cost Nursing Robot with Telemedicine using ESP32 and Robot Operating System-based Suharjono, Amin; Apriantoro, Roni; Supriyo, Bambang; Wardihani, Eni Dwi; Yunanto, Bagus; Hidayat, Wahyu; Prasetio, Katon; Reynaldi, Rindang; Fahrul Aji, Achmad
JOIV : International Journal on Informatics Visualization Vol 9, No 2 (2025)
Publisher : Society of Visual Informatics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62527/joiv.9.2.2793

Abstract

The COVID-19 pandemic has presented unprecedented challenges to the healthcare sector, particularly frontline healthcare workers. These professionals face high infection risks and physical and mental exhaustion due to intensified workloads and staffing shortages. Robots are seen as a potential solution to this predicament, performing tasks such as delivering supplies and monitoring patients. However, widespread adoption of such robots, particularly in resource-constrained settings, has been hampered by the exorbitant costs associated with their acquisition and maintenance. To address this problem, the authors developed a low-cost nursing robot based on the ESP32 and the Robot Operating System (ROS). This robot facilitates hospital logistics and patient monitoring through telemedicine. The robot is controlled by remote control or Wi-Fi connection through the RViz Graphical User Interface (GUI) and uses odometry and PID control methods to follow specified paths autonomously. Accessible via local area networks and the Internet, the telemedicine system demonstrates robust performance with minimal X and Y axis control errors, zero packet loss, an average Round Trip Delay (RTD) of less than 150 ms, and jitter values of less than 20 ms, in line with TIPHON standards. This innovation provides a cost-effective solution to support healthcare workers during the ongoing health crisis. In future development, incorporating LiDAR, computer vision, and AI-based decision-making into the robot can facilitate obstacle detection and real-time decision-making to enable fully autonomous movement. These advancements will enhance the robot’s adaptability and accuracy in navigation and positioning.
PENERAPAN TEKNOLOGI PENYIRAM TANAMAN OTOMATIS BERBASIS WEBCAM UNTUK USAHA TANAMAN “SURYA NURSERY" DI KELURAHAN PEDALANGAN SEMARANG: PENERAPAN TEKNOLOGI PENYIRAM TANAMAN OTOMATIS BERBASIS WEBCAM UNTUK USAHA TANAMAN “SURYA NURSERY" DI KELURAHAN PEDALANGAN SEMARANG Sayekti, Ilham; Aji, Achmad Fahrul; Adiwismono, Agus; Rochadi, Agus; Supriyo, Bambang; Krishna, Bangun; Utomo, Kusno; Nursaputro, Septiantar Tebe; Kusumastuti, Sri; Kartika, Vinda Setya
Bangun Rekaprima Vol. 11 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v11i1.6386

Abstract

This community service activity aims to help the ornamental plant business at "Surya Nursery," located in Pedalangan Village, Semarang, overcome plant care constraints due to limited time and human resources. The technology applied is an Arduino UNO-based automatic plant waterer equipped with a webcam for real-time monitoring in the business environment. The watering tool consists of 5 sprinklers that can rotate 360 degrees for an area of 200 square meters and can operate automatically or manually depending on the needs of the partner.Through this program, the team provides training and assistance to business partners, starting from device installation, system use, and maintenance of the technology applied. This system is expected to increase time efficiency, reduce water consumption, and maintain plant quality consistently.The results of this activity show that the tool can operate well, and partners feel the benefits in the form of increased productivity and reduced daily workload. The technology applied also opens up opportunities for "Surya Nursery" to increase competitiveness in the ornamental plant market. With this program, it is hoped that similar technology can be adopted by other small and medium enterprises in the agricultural sector.
Alat Peraga Kendali Pemanas Udara Berbasis Arduino Uno Sebagai Penunjang Praktikum Laboratorium Kendali Politeknik Negeri Semarang [A Demonstration Tool of Arduino Based Air Heater Controller to Support Control Laboratory of Politeknik Negeri Semarang] Supriyo, Bambang; Kuntardjo, Samuel Beta; Sihono, Sihono
FaST - Jurnal Sains dan Teknologi (Journal of Science and Technology) Vol. 1 No. 1 (2017): NOVEMBER
Publisher : Universitas Pelita Harapan

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Abstract

The objective of this research is to develop and test the demonstration tool of Arduino based air heater controller with Proportional Integral Derivative (PID) based control methods for the temperature range between 50ºC and 70ºC.   Arduino Uno was programmed using C-language to do control tasks and to transfer control data serially to computer via USB port. The selection of the initial PID  parameters are determined using the combination of Relay Feedback method and Ziegler-Nichols  formula.  The control methods were focused on proportional (P), proportional derivative (PD) dan Proportional Integral Derivative (PID) with the performance criteria based on overshoot  dan steady state error.  The experimental results show that the PID controllers give best output responses in terms of zero steady state errors, while P and PD controllers still result in steady state errors of about 3ºC. In addition, P controllers still give about 2,5ºC-4ºC fluctuative output values below set points, while the PD and PID have very small fluctuative values and even very close to zero. This laboratory demonstration tool has shown very good PID based controller performance, so it is feasible to be used as a supporting demonstration tool for control system laboratory in Politeknik Negeri Semarang or even other universities.
Co-Authors Abu Husain, Nurul Akmar Akmar Agus Adiwismono Agus Rochadi, Agus Agus Slamet Aji, Achmad Fahrul Amin Suharjono Apriantoro, Roni Bagus Yunanto Dedy Ramdhani Harahap Eni Dwi Wardihani, Eni Dwi Fahrul Aji, Achmad Feriadi, Indra Ilham Sayekti Kartika, Vinda Setya Krishna, Bangun Kuntardjo, Samuel Beta Nursaputro, Septiantar Tebe Prasetio, Katon Putro, Wahju Djalmono Reynaldi, Rindang Sihono Sihono Sri Kusumastuti, Sri Sugeng Ariyono, Sugeng Utomo, Kusno Wahyu Hidayat