Pertumbuhan konsumsi listrik semakin banyak dikarenakan pertumbuhan penduduk dan ekonomi dunia. Monitoring dan kontrol konsumsi energi listrik diharapkan dapat membantu efisiensi. Salah satu perangkat yang digunakan menghubungkan sumber listrik ke perangkat listrik adalah elektrik soket. Penelitian ini dilakukan dengan cara eksperimen dan memodifikasi stop kontak yang umum di pasaran. Stop kontak ditambahkan sensor tipe PZEM-004T yang dapat membaca tegangan, arus dan daya. Data yang diambil dari sensor kemudian dibandingkan dengan alat power quality analyzer untuk mengetahui tingkat kepresisian pengukuran. Real time clock tipe DS3231 digunakan untuk menghitung pemakaian beban secara real time. Data diolah oleh mikrokontroller kemudian mengirimkannya ke Smart phone. Pengguna dapat memonitor biaya pemakaian dalam rupiah (Rp). Komunikasi stop kontak ke Smart phone menggunakan bluetooth tipe HC-05 dengan jarak maksimal 10 m. Relay dipasang untuk memutuskan aliran listrik sesuai dengan timer yang telah diatur. Berdasarkan hasil pengujian alat data yang dimonitoring memiliki perbedaan dengan persentase 0,13% untuk tegangan, 2,26% untuk arus dan 1,75% untuk daya. Aplikasi yang dibuat bekerja dengan baik dan dapat mengontrol ON/OFF sumber listrik pada stop kontak.The growth in electricity consumption is increasing due to population growth and the world economy. Monitoring and controlling the consumption of electrical energy is expected to help efficiency. One of the devices used to connect a power source to an electrical device is an electric socket. This research was conducted by experimenting and modifying common sockets on the market. The socket is added with a sensor type PZEM-004T which can read voltage, current and power. The data taken from the sensor is then compared with a power quality analyzer to determine the level of measurement precision. Real time clock type DS3231 is used to calculate load usage in real time. The data is processed by the microcontroller and then sends it to the smartphone. Users can monitor usage fees in rupiah (Rp). Communication socket to smartphone using bluetooth type HC-05 with a maximum distance of 10 m. Relay is installed to cut off electricity according to the timer that has been set. Based on the test results, the monitored data tool has a difference with a percentage of 0.13% for voltage, 2.26% for current and 1.75% for power.
Remotely Operated Vehicle (ROV) is one of the robots that are being developed in Indonesia for exploring underwater potential. In this final project, the ROV was designed and controlled by Arduino for diving underwater with maximum depth of 30 meters. The application of ROV is that to take pictures and record video of underwater environment in real time by using camera monitored through a PC. The construction and the electronics device of the ROV were made waterproof. The actuator used was bilge pump motor 1100GPH 12 Volt as thruster motor. The thruster driver used was a two channel-relay and the vision system of robot was a CCD camera. Based on the results, it was obtained that the ROV was able to move according to the commands provided by operator using a remote control. At three meters depth, the robot can move forward with average speed of 0.161m/s. For up and down movement at 3 meters depth, the robot can go up with average speed of 0.09 m/s and down with average speed of 0.17 m/s. From the data, it can be concluded that the ROV can maneuver and use the camera properly.
Monitoring wind speed and direction is usually performed at close range, therefore,it is necessaryto monitor remotely for time efficiencies. Making these systems start with a literature study the data relating to the technology to be used. Then the data was processed to determine the design of the system being designed. Making this system begins with a measuring instrument wind speed and wind direction. In this device for chopping round of the wind speed sensor using optocoupler. And magnetic hall sensor, constructed as a weathervane as a determinant of the wind direction sensor. RTC is used as time refference of measurement. Arduino Mega 2560 Microcontroller used to process data obtained from sensors and RTC. Then the data is the data is recorded with a cycle which can be set. After the manufacture of measuring devices and then proceed to make the data transmission system and application interface. With GSM shield Sim900a data that has been recorded is sent in the form of SMS through GSM network. Then the data is received by GSM shield servers and read by Arduino UNO. Data is read by Arduino UNO is then sent to a computer with serial communication. The data is sent to the computer will be processed by the application interface to be stored and displayed. The results of this system is able to measure and store data speed and direction of the wind from a distance. With a windspeed error of 4.56% of the measurements manually, and wind direction indicates the actual wind direction.
Dalam penelitian ini, diperkenalkan beberapa pemetaan kontraksi di ruang metrik modular kompleks sebagaimana terjadi di ruang metrik modular, diantaranya adalah pemetaan Kannan kompleks dan Chatterjea kompleks. Selanjutnya, dibangun beberapa teorema titik tetap yang melibatkan kedua pemetaan tersebut. Eksistensi dan ketunggalan titik tetap untuk pemetaan Kannan kompleks dan pemetaan Chatterjea kompleks berhasil dibuktikan.
Polman Bangka-Belitung is one of the Polytechnics in Bangka-Belitung Province, where the output of this graduate is an engineer in the field of electrical engineering, design and machining. With the support of equipment and experienced lecturers in the vocational field, one of the obligations of a lecturer is community service, where the main purpose of this service is to apply knowledge and technology that can improve the welfare of the community both in the campus environment in particular and the people of Bangka. In general, the method used in this process is by using a quantitative method, namely applying direct observations of conditions in the field or in other words in real terms of taking data in the field. And one of the service programs is to provide training using smart relays, based on a survey we did where almost 95% of the students of SMK Negeri 2 Sungailiat Bangka Induk have not been able to understand about smart relay programming as a whole, so they need training that leads to the competencies they have in accordance with the standar of the National Professional Certification Agency, as well as in the manufacturing industry.
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