Internet of things (IoT) and fuzzy logic are very useful in increasing the efficiency and effectiveness of a system; this study applies both to the street lighting systems. The prototype of a street lighting control and monitoring system has been completed. The status of lights that are on or off and the value of the light intensity can be monitored by using IoT. The intensity of the light is fuzzy controlled by utilizing the presence of vehicles and pedestrians around the lights. The prototype is made with a scale against real conditions. Data is processed and transmitted using a microcontroller and Wi-Fi on the IoT module. Mobile applications have been used on smartphone interfaces to monitor and control lamps wherever they are connected to the Internet. Changes in the status of lights to turn on or off are done by the relay module. The fuzzy light intensity control system uses sensors and microcontrollers by utilizing the presence of vehicles and pedestrians around the lights. Performance evaluation has been carried out on a miniature street lighting with the results of monitoring and control following its function. An analysis of the resulting energy savings has been demonstrated.

Dalam  suatu  sistem  produksi, salah satu parameter produk adalah berat. Banyak industri terganggu dikarenakan kesalahan dalam penentuan berat di bagian pengecekan. Oleh karena itu, diperlukan suatu sistem  yang dapat menyortir produk tersebut secara otomatis sehingga dapat lebih memaksimalkan waktu, dan hasil produksi dapat lebih ditingkatkan. Tujuan dari penelitian ini adalah untuk merancang dan mengimplementasikan prototipe mesin sortir otomatis berbasis mikrokontroler untuk kebutuhan sortir barang. Metode penelitian dilakukan dengan membuat desain empat masukan untuk mikrokontroler. Masukan untuk mikrokontroler terdiri dari dua buah tombol tekan sebagai pengatur nilai yang menaik dan pengatur nilai yang menurun serta dua masukan lain berupa sensor optocoupler dan sensor load cell. Keluaran dari mikrokontroler didesain sebanyak empat keluaran. Keluaran pertama dihubungkan dengan relay, motor driver DC, dan motor DC sebagai penggerak conveyor. Keluaran kedua dihubungkan dengan driver motor DC forward reverse dan motor DC untuk aktuator. Dua keluaran lainnya dihubungkan dengan buzzer dan LCD. Berdasarkan hasil pengujian yang dilakukan, prototipe mesin sortir otomatis untuk sortir ini mempunyai persentase error sebesar 0,183%. Dengan nilai toleransi error yang sudah ditentukan oleh perancang sesuai kebutuhan sebesar 2,5% maka alat prototipe mesin sortir otomatis untuk sortir ini dapat dinyatakan sesuai dengan apa yang sudah ditentukan dalam perancangan.

This paper aims the street lighting efficiency optimization of street lighting on Dr. Setiabudhi street, Bandung city. Particle Swarm Optimization (PSO) algorithm is used to get maximum lighting efficiency values with constraints in the form of lamp height, the distance between lights, lamp power, type/width of the street, the average illuminance and minimum illuminance according to Indonesian national standards (SNI) standards. Parameter optimization to obtain optimal values based on global standards and Indonesian national standards (SNI) has been done. PSO using MATLAB® (R2017a, MathWorks Inc, USA) has produced a street lighting optimization model with the level of lighting efficiency twice higher than the evaluation of existing conditions. Testing the results of the PSO algorithm shows a difference of 9.7% higher than the DIALux evo (8.0, Ludenscheid, Germany) software design. The test results show that the PSO algorithm can be used to obtain optimum lighting efficiency from a public street lighting system following SNI.

The prototype of the rice drying machine is a device used for rice dryers that are not weather dependent. The driver of this prototype rice drying machine uses ½ HP induction motor as its main mover. To be able to adjust the rotation of the induction motor using Variable Frequency Drive (VFD) brand LS iC5 with 1 HP power. The rotation needed to rotate the load can be done by changing the frequency and voltage so that the rotation speed of the induction motor can be adjusted as needed. From the testing of a no-load induction motor with a frequency adjustment range from 5 Hz to 13 Hz, the induction motor speed is 142.8 rpm (rotation per minute) to 375.3 rpm. The measured voltage is 76.5 V to 116.7 V and the measured current is 2.5 A to 1.6 A. From the results of the test of a no-load induction motor it can be concluded that the ratio of frequency to voltage is directly proportional while the ratio of frequency to current is inversely proportional. In testing induction motors with a frequency adjustment range from 5 Hz to 9 Hz, they produce the same conclusions as to the induction motor load testing. VFD is certainly appropriate to be used as a speed regulator as needed.

Metal sorting conveyor is a device that is used to separate metal and non-metal objects, the drive of this conveyor uses ½ Horse Power (HP) induction motor as its prime mover. To adjust the rotation of the induction motor 1 HP Variable Frequency Drive (VFD) is used. This VFD is set with the double speed parameter so that later the motor can rotate variably in two speeds. The input parameters of the VFD itself use switches in the form of photo electric and inductive proximity which are controlled automatically using Programmable Logic Control (PLC). The digital output of the PLC will then communicate with the digital input of the VFD so that when the object on the conveyor is detected by a photoelectric, the VFD will adjust the frequency by 8,5 Hz, if the object on the conveyor is detected by metal by inductive proximity, the VFD will set the frequency by 14,5Hz . So that at each of these frequencies the motor can rotate with speeds of 241,5 rpm and 359,5 rpm. The results of the trials carried out show that VFD can regulate in a number of speeds in a variable manner, but in this study limited to using two speeds or double speed as a variable speed experiment.