The aim of this study is to investigate and analyze the NdFeB N52 type magnetic field distribution on a Trapezoidal type coil in an axial type generator. The main problems addressed by this study are how the distribution of magnetic field type NdFeB N52 to the trapezoidal type coil and how the influence of air gap between NdFeB N52 magnets and the coil to the output electric voltage generated from the coil at the speed of rotation. In order to answer the problems, we moved a rectangular type magnet axially towards the trapezoidal type coil with a specified distance, so that we could identify the change of the output voltage. The description of the magnetic field distribution in the stator was simulated by using the Maxwell 3D Design application ran in ANSYS software 16.0. The result of this study shows that the magnet was distributed evenly on the coil. It is also known that based on experiments with 2mm to 6mm of magnet to coils of gaps, the highest output voltage is at 2mm gaps at 750rpm.

Measurements of wind energy from rural areas play an important role in mapping the wind energy potential. It takes a reliable communication from sensor to server. Technique of wireless data transmission from the sensors are placed in rural areas to the server, often in trouble caused by the weather and the system so that it makes the data collected in the server becomes inaccurate, on the further condition, it is causes the lack of proper decision. This study focused on the implementation of the equation for the batching process as a fundamental coding program in the process of capture and transmission data captured from the sensors to the host node node. Communication performance testing occured on node to node (N2N) wireless communications. Data measurement variable are the wind speed, temperature and humidity. The distance between the sensor node and the server node at 100 meters. From this research, that the data generated are measured in one day from the sensor node was successfully changed in the form of 3 packages stored in the memory card is then sent to the host node. Results capture of sensor nodes during the day, which is placed in the environment of the University Siliwangi Tasikmalaya in West Java of Indonesia, to show that the highest wind speed is 5 (m/s) is at noon is 13:00 to 15:00, while the lowest rate is in the morning is 4:00 until 6:00.

Penerangan jalan umum (PJU) merupakan aspek penting dalam penataan suatu daerah/kota. PJU berbasis Internet of Things (IoT) sebenarnya sudah banyak, baik menggunakan kabel atau nirkabel. Namun, masih banyak PJU yang menggunakan sistem manual untuk mengaktifkan dan mematikannya. Pada lokasi tertentu PJU dengan basis IoT tidak dapat bekerja karena terletak pada daerah pedalaman yang tidak terjangkau oleh internet. Maka, pada penelitian ini digunakan metode power line carrier (PLC) KQ330 sebagai penghantar komunikasi data. Pada tiap PJU dilengkapi Arduino Uno, PLC, dan relai. Arduino Uno akan memproses data yang diterima pada sisi PJU dan diteruskan pada relai yang akan menyalakan dan mematikan lampu. Lampu PJU dikendalikan melalui web interface yang terhubung dengan NodeMCU sebagai pengirim data pada PJU. Pengirim dan penerima akan terhubung dengan komunikasi melalui jaringan kabel PLN. Dari pengujian yang telah dilakukan, pada mode otomatis PLC dapat mengirim data sejauh 200 meter dengan durasi pengiriman 252 milidetik. Untuk mode manual pada jarak 200 meter PLC dapat mengirim data dengan durasi 1 detik. Oleh karena itu, PJU dengan kendali PLC dapat diimplementasikan pada daerah yang tidak terjangkau akses internet.