Electrical distribution system is a component of electrical power system that is very important because it is closest to the customer. In its operation, the distribution system often suffers that causes the flow of electricity to the customer is interrupted. This situation is not expected by customers or by electric power companies. The more frequent and longer the occurrence of electrical power flow interruption, the lower the system reliability, and vice versa. Reliability of a distribution system can be analyzed based on SAIDI and SAIFI parameters. In this research, reliability analysis of distribution system on Gejayan substation. The analysis result using SAIDI and SAIFI parameters shows that Gejayan substation is reliable enough to national standard, while based on international standard still not reliable.
SMK Muhammadiyah Minggir merupakan salah satu sekolah kejuruan di Kecamatan Minggir yang berdiri pada 2007 dan memiliki Jurusan Farmasi dan Teknik Instalasi Tenaga Listrik. Pada waktu itu animo masyarakat untuk mendaftar sebagai siswa cukup tinggi, tetapi setelah beberapa tahun berjalan jumlah siswa yang mendaftar mulai menurun. Fasilitas laboratorium Jurusan Teknik Instalasi Tenaga Listrik sudah cukup lengkap, tetapi belum memiliki modul pembelajaran tentang energi terbarukan. Tujuan dari kegiatan ini adalah memberikan pemahaman terhadap implementasi energi terbarukan berupa sistem penerangan jalan umum berbasis sel surya, menambah fasilitas laboratorium, sebagai penerangan jalan umum dan dapat dipergunakan sebagai media promosi sekolah. Luaran yang diharapkan dari program ini adalah meningkatkan kemampuan siswa dan guru dalam memahami sistem pemanfaatan energi terbarukan khususnya sel surya. Metode yang digunakan adalah dengan melaksanakan workshop implementasi penerangan jalan umum berbasis panel surya. Hasil dari kegiatan berupa sistem penerangan jalan umum berbasis sel surya berjenis PLTS Off-grid dengan spesifikasi surya panel 80 Wp, Lampu DC LED 30 Watt termasuk modul smart solar charge controller, baterai 5 Volt/70Ah berjenis Lithium, box panel dan tiang peyangga setinggi 5,5 meter. Sistem ini menghasilnya daya maksimal sebesar 400 Watt dan cukup untuk memenuhi kebutuhan listrik lampu LED DC 30 Watt.
Wheeled robot is a robot that can run on a flat surface with the help of wheels as a driving medium. The robot is made using Arduino as a programming brain, where the robot can move forward, backward, turn right, and turn left with a smartphone via Bluetooth module. It is controlled via a smartphone as a remote control and Bluetooth HC-05 as a connecting medium between smartphone and robot. In addition to using the Arduino robot, it uses the L298N motor driver as an output regulator for DC motors. Based on the results of testing on this design, in experiment 1, the speed of robot experiment I is 0.58 m/s for a distance of 3 meters completed in 5.1 seconds, in experiment II, the speed is 0.56 m/s with the same distance and completed in 5.3 seconds, and in experiment III, the speed is speed of 5.4 m/s in 5.5 seconds. The difference in speed and duration between experiments is influenced by factors such as reduced battery voltage, and the process of sending data and pairing can be done as far as 13 meters.
In 2016, Microcontroller Research Group at Dept. of Electrical Engineering Universitas Muhammadiyah Yogykarta has designed and developed a payload for High Altitude Balloon. This payload has function measuring atmospheric parameter vertically and sending the data to ground station on earth using telemetry. The parameters measured are air pressure, temperature and relative humidity. Besides sending these parameters, payload also have mission monitoring real positions of payload using GPS, real time video transmission,regulary capturing and sending image from payload . This payload is tested on the annual Atmosphere Balloon Payload Competition (KOMBAT) 2016. This paper will describe the design payload, payload software algorithms and the results that have been obtained.
This paper discusses an interface data acquisition (DAQ) of a rocket using LabVIEW. The software development is meant to improve the quality and reliability of the interface that has been built by the UMY rocket team. The data used on the experiments is a set of dummy data created for simulation purpose. This data is generated by Arduino UNO, in which it was acquired by LabVIEW through VISA serial communication platform. The test results show that there is 10% error during the data retrieval. The DAQ average speed is 270 milliseconds. This new approach has more stable and reliable system when compared to previous algorithm.
Lulusan SMK secara garis besar terbagi menjadi dua yaitu lulusan SMK yang melanjutkan ke jenjang perguruan tinggi dan lulusan yang mencari pekerjaan. Lulusan SMK yang mencari pekerjaan akan dihadapkan dengan jumlah lapangan pekerjaan yang terbatas sehingga akan menambah tingkat pengangguran. Selain jumlah lapangan kerja terbatas, pengangguran lulusan SMK juga disebabkan karena kurangnya pengetahuan mengenai peluang-peluang usaha kreatif yang mampu memberikan dorongan untuk melakukan kewirausahaan dan memperluas lapangan pekerjaan. Sebagai salah satu upaya untuk mengatasi permasalahan tersebut adalah pengenalan ide kreatif yang diharapkan mampu menanamkan jiwa kewirausahaan untuk siswa SMK sejak dini. Ide kreatif disini adalah pengunaan Display Matrix P10 untuk sarana penyampaian informasi. Display Matrix P10 adalah penampil yang memanfaatkan LED untuk membentuk rangkaian huruf sehingga dapat menampilkan informasi tertentu. Program pengabdian masyarakat ini telah dilakukan pada mitra SMK 1 Bantul. Program ini dilaksanakan meliputi perancang Sistem Display Matrix P10 skala demonstrasi, pembuatan panduan perancangan, serta memberikan demonstrasi dan contoh langsung kepada mitra. Mitra SMK 1 Bantul menyatakan bahwa Program Pengabdian masyarakat ini positif dan bermanfaat bagi sekolah dan siswa, terutama untuk memberi bekal kewirausahaan saat sudah lulus. Penulis beharap program ini dapat bermanfaat untuk calon lulusan SMK agar dapat berwirausaha dengan ide kreatif penggunaan Display Matrix P10 sehingga dapat memberikan peluang pekerjaan lebih luas.
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