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SPEKTRAL : Journal of Communications, Antennas and Propagation
Published by Politeknik Negeri Jakarta
ISSN : -     EISSN : 27745562     DOI : https://doi.org/10.32722/spektral.v1i1
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering
Komunikasi dan Teknologi Jaringan : Sistem Komunikasi Nirkabel dan Bergerak, Pengolahan Sinyal Digital dan Multimedia, Pengolahan Sinyal Biomedik, Teori Informasi , Modulasi, Pengkodean Sumber dan Kanal, Algoritma dan Protokol Komunikasi, Komunikasi Radio dan Satelit, Penerapan IoT, Jaringan Telekomunikasi, Komunikasi Optik, Jaringan Sensor Nirkabel, Artificial Intelligence, Machine Learning, Computer Vision, Mobile and Cloud Computing, Pervasive Computing, Big Data, Keamanan Jaringan, Cognitive Radio, Embedded System. Antena dan Propagasi: Desain dan Analisa Antena, Microstrip Antena, Penerapan Teori Medan Elektromagnetik, Radar and Remote Sensing, Gelombang mikro dan gelombang millimeter, Pemodelan Kanal dan Propagasi.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 5 Documents
 1 
Search results for , issue "Vol. 3 No. 1 (2022): April 2022" : 5 Documents clear
Utilization of Automatic Packet Reporting System (APRS) for Weather Station Monitoring Sonny Dwi Harsono; Nur Salma Y.H; Zhauhar *; Rifki Ardinal
Spektral Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v3i1.4353

Abstract

Nowadays, weather monitoring is indispensable. The data obtained in the present or past can be a reference to predict future weather, can be used to determine the condition of the antenna on ground stations in the face of extreme weather. It is necessary to have a tool that can read the parameters of the weather, because the importance of weather monitoring. Automatic Weather Station (AWS) This type of ADS-WS1 is a tool that can read several parameters of weather quantities such as rainfall, wind direction, wind speed, temperature, humidity, and pressure. It has equipped with sensors to read the number of weather parameters. ADS-WS1 not using internet networks, but use radio frequencies for sending a sensor data that has connect to the transceiver. With that frequency the signal will be transmitted and received via satellite or terrestrials with Automatic Packet Reporting System (APRS) through radio frequency and Internet gateway or known as (iGate). The result from the sensor that have been installed at the PUSTEKSAT ground station can be monitored both on Radio Frequency (RF) and Internet, the purpose of this research is to send weather data station with APRS format via Radio frequency,  this  a proof of concept for sending weather information via APRS format system. Keywords- AWS, APRS, Radio, ADS-WS1, Frequency
Rancang Bangun Alat Penghitung dan Pemilah Ikan Berdasarkan Berat Menggunakan Sensor Ultrasonik dan Load Cell Berbasis Arduino Uno Marissa Andini; Maria Ulfah
Spektral Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v3i1.4521

Abstract

Nowadays, weather monitoring is indispensable. The data obtained in the present or past can be a reference to predict future weather, can be used to determine the condition of the antenna on ground stations in the face of extreme weather. It is necessary to have a tool that can read the parameters of the weather, because the importance of weather monitoring. Automatic Weather Station (AWS) This type of ADS-WS1 is a tool that can read several parameters of weather quantities such as rainfall, wind direction, wind speed, temperature, humidity, and pressure. It has equipped with sensors to read the number of weather parameters. ADS-WS1 not using internet networks, but use radio frequencies for sending a sensor data that has connect to the transceiver. With that frequency the signal will be transmitted and received via satellite or terrestrials with Automatic Packet Reporting System (APRS) through radio frequency and Internet gateway or known as (iGate). The result from the sensor that have been installed at the PUSTEKSAT ground station can be monitored both on Radio Frequency (RF) and Internet, the purpose of this research is to send weather data station with APRS format via Radio frequency,  this  a proof of concept for sending weather information via APRS format system. Keywords- AWS, APRS, Radio, ADS-WS1, Frequency  
Rancang Bangun Sistem Penyiraman dan Perawatan Tanaman Geranium Terintegrasi Telegram Rizki Azka Fihi Aghnia; Annisa Shafira Darmawan; Shita Fitria Nurjihan; Ardina Askum
Spektral Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v3i1.4528

Abstract

As a tropical country, Indonesia has a rainy season where there can be mosquito breeding which is quite dangerous for humans. There are several ways to deal with it, one of which is by growing your own geranium plants at home. To make it easier to water these plants, we need a system that can do it even if the planter is not at home. Thus, a system was designed using the Internet of Things (IoT) concept, so that watering plants can be done remotely and water savings can be realized. The system consists of a NodeMCU microcontroller which is connected to the Telegram application as an interface to the user. The three sensors used as input components of the system are the DHT22 sensor to measure the ambient temperature, the soil moisture sensor to measure soil moisture, and the magnetic float sensor to measure the water supply. The output components used are water pumps and servos. The system is powered by a DC power supply with an output voltage of 12 V to power the water pump and 5 V to power the NodeMCU. The results of testing the tool show that the tool works well. The system works when the humidity level is below 80% will automatically carry out the watering process, at temperatures above 32oC  the paranet can be lowered, and when the water is full or empty, the water supply can be detected accurately. NodeMCU can connect to the Telegram application with the help of a Telegram Bot library called CTBot that allows users to receive information and give orders. Keywords : soil moisture, plant watering, paranet, temperature
Perancangan Sistem Monitoring Pada Water Purifier Berbasis Website Tito Chandra Dinata Arifin; Dean Corio; Afit Miranto
Spektral Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v3i1.4536

Abstract

The need for drinking water is one of the basic needs that must be met by humans, drinking water has various kinds of compounds and bacteria in it. Drinking water is generally the result of processing with various methods, one of which is the use of nonthermal plasma technology. With the presence of non-thermal plasma technology to kill bacteria such as e-coli and other microorganisms with a working system that eliminates bacteria in the air. This looks effective when we use plasma because with high voltage the bacteria will die. In well water which is usually used for cooking and drinking in households, the bacteria or microorganisms in it are not completely killed. This water purification system is very useful if it is developed especially in areas that have not been reached by clean water or PDAM, in rural areas it is estimated to be very effective. This tool works well. Generally, in rural areas, the use of the latest technology is not too much. With the addition of a part of a microcontroller system and a monitoring system in the form of a website, it is very easy to operate this tool, we can combine the PH and TDS of the water we are going to purify. Equipped with a microcontroller system that makes it easy to control something and run tool commands. Keywords: Non-Thermal Plasma, PH, TDS, Microcontroller System, Monitoring System
Aplikasi Android Loker Penyimpanan Keyless Berbayar pada Stasiun MRT Haykhal Bhatara Dimas Arief; Viving Frendiana
Spektral Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/spektral.v3i1.4574

Abstract

MRT or Mass Rapid Transportation is one of the transportation services built to overcome congestion in Jakarta. The main purpose of the construction of the MRT is to provide convenience for the community in an effort to increase mobility that is reliable, comfortable and affordable. The increasing number of people who use this transportation, of course, must go hand in hand with supporting facilities in daily activities, one of which is safe storage of goods. As a solution to these problems, it is necessary to design a system that can provide storage in the form of an efficient and safe locker, namely a Paid Keyless Storage Locker at the Jakarta City MRT Station. This system consists of lockers and applications that are connected to each other. This app is integrated with the Firebase Realtime Database as a connection between the app and the locker. The function of the application is where the user places an order for a locker based on the desired station location and to open the locker. as a processing tool according to the choice of time and determine the locker used with the QR code payment that appears on the application to the ESP 32-CAM which functions as a function. The tests carried out for this application are tests that refer to the ISO 25010 standard with aspects of functional suitability, compatibility, portability, performance efficiency, and usability. The results of testing aspects of functional suitability, compatibility, and portability get 100% feasibility presentation results. Then for the performance efficiency aspect, it was carried out on two devices with CPU (Central Processing Unit) performance results of 9.973% and 1.58% and memory performance results of 128,521 MB and 61,199 MB. The last test, namely the usability aspect, showed that from the ten-point questionnaire distributed to the respondents to get the results, eight points were very feasible and two questionnaire points were feasible. Keywords: MRT, Application, Database, QR code, ISO 205010

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