IPTEK BAGI MASYARAKAT PEMBUDIDAYA IKAN HIAS AIR TAWAR KABUPATEN TULUNGAGUNG

Freshwater fish is one of the flagship of Tulungagung regency where freshwater fish are cultivated in ponds around the house. The main problems faced by two Partners in this program is the growth of fish are strongly influenced by water quality and water circulation conditions. While the problems in post-harvest is that when quarantine in the aquarium requires regulation of dissolved oxygen levels, circulation, and temperature. This community service activity using a science and technology for society approach (IbM). The method of implementation of this activity are: 1) providing counseling; 2) the installation of appropriate technology (TTG) to the two partners in the form of pond’s electricity management with setup installation of electrical system complete with backup generator; and 3) training on the use of TTG. The results of IbM's activities turned out to have a positive impact for freshwater fish farmers because it has decreased the number of fish mortality, which means increasing the income of the two partners

IMPLEMENTASI SISTEM KONTROL PENGGERAK MOTOR STEPPER PADA PROSES MOLDING MICROPLASTIC BERBASIS PID MENGGUNAKAN PLC DAN ARDUINO

The current industry has entered an era where every production process incorporates automation and data exchange in its manufacturing. This era is known as Industry 4.0. Industry 4.0 has had a significant impact on various industrial sectors, particularly in the production of plastic goods using techniques such as injection molding. This process is capable of producing more precise products. In the injection molding process, a well-controlled system is needed to guide plastic pellets according to the intended mold design, utilizing actuators like stepper motors. This research aims to apply the PID (Proportional-Integral-Derivative) method to control stepper motors in microplastic molding processes. The proposed system has been successfully implemented and can produce products according to the planned specifications. The most suitable PID parameter values for controlling the stepper motor are Kp = 14, Ki = 0.007, and Kd = 7000. Changing the setpoint value from 2500 to 2700 has an impact on the molding results, with the best results achieved at a setpoint value of 2700. A setpoint value of 2700 ensures that the mold and nozzle are in the correct, tight position, allowing the molding process to proceed smoothly in line with the provided design

MPPT using Firefly Algorithm for Cuk Converter in Photovoltaic

High intensity of sunlight in Indonesia (up to 10 hours per day) is a great opportunity to be utilized as renewable energy by absorbing solar energy using solar panels. The absorbed solar energy is channeled into a DC/DC converter circuit with a Cuk converter topology so that it can be used with small current ripples. The Maximum Power Point Tracker (MPPT) method is needed to get optimum power from solar panels. To optimize the MPPT value, its performance is supported by using the Firefly Algorithm (FFA). This study focused on observing changes in FFA parameters, i.e., firefly populations and random parameters to generate optimal power on Cuk converter topology with MPPT method. FFA embedded in microcontrollers has successfully optimized MPPT performance with the best response obtained in the firefly population = 25, absorption coefficient (γ) = 0.5, random value (α) = 0.6, iteration = 10, with an optimal power of 25.7 Watts