Palka ikan muatan hidup saat ini tidak mampu mengontrol parameter pH air sesuai dengan lingkungan hidup ikan. pH perlu diperhatikan agar ikan dapat bertahan hidup. Tujuan dari penelitian ini adalah merancang bangun sistem yang dapat mengontrol ph air pada palka ikan menggunakan mikrokontroler dan LabVIEW. Pengujian dilakukan pada palka dengan dimensi 90 cm x 65 cm x 50 cm. Monitoring perubahan nilai pH secara real time dilakukan melalui LCD dan LabVIEW. Perangkat ini dilengkapi dengan indikator LED yang dapat mengindikasikan kondisi dari relay diluar dari perangkat lunak LaBVIEW. Selisih pembacaan sensor yang dirancang dengan alat ukur standar hanya berkisar 0,05. Proses penampilan nilai pembacaan sensor pada LCD dan LabVIEW berjalan baik dengan waktu respon pembacaan sekitar 0,5 detik dan dengan respon waktu dalam mengendalikan relay sekitar 0,3 detik. Ikan dapat bertahan hidup dengan menggunakan sistem kontrol yang dirancang selama proses pengujian dalam waktu 2x24 jam. Nilai pembacaan dari sensor akan tersimpan secara real time selama perangkat lunak LabVIEW berjalan.
The Diesel Power Plant is an oil-fired generator. The PLTD engine in Ranai uses Bio Solar fuel to produce 1 MW (MegaWatt) of power. The PLTD engine in Ranai each has one tank with a capacity of 1820 liters. Within 1 hour of using a machine with a power of ±, 750 KW (Kilo Watt) can consume ± 182 liters of oil. The IoT system serves to simplify the work in the oil distribution system. This IoT system uses the ESP8266 as a microcontroller, the HC-SR04 ultrasonic sensor as a volume level reader for the oil in the engine tank, and a relay as a replacement switch pump on or off. This tool works in real-time to help reduce the risk of negligence in refueling the engine. The Device testing results showed good results because the error value in the measurement distance test was 0%. The tool can provide fast and accurate information because it is equipped with an information system using Android and notifications from email messages.
From age two, children strive to be more independent, and they also need encouragement to make simple choices in their lives. The level of independence of children must be following their ages, abilities, and activities. Since children’s education through over-regulation is inappropriate, we should encourage them to draw and make games instead. Children need to learn to plan their activities so that they can develop their creativity. Based on that background, community service programs by introducing Tech for Kids are necessary. This method focused on learning the Engineering Design Process, which is a 21st Century learning model. This program aimed to introduce children to the design process. Design is the study of the aesthetics and uses of things in everyday life. However, professional designers sometimes have a complex multi-step process for creating and improving plans to solve problems. Engineering design is a user-centered design process. The process starts with ethnography to produce a prototype as a solution concept that suits the community’s needs. The methods applied in the implementation of the service program are tutorials and mentoring practices. The results of the community service program show that social and cross-cultural knowledge and skills in children or students increase with indicators of presentation of work results as confirmed by the results of the skill test, which increased from level 1 to 3.
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