No abstract

Sistem ini terdiri atas 3-axis accelerometer MMA7260Q sebagai sensor percepatan, mikrokontroller, radio frekuensi, dan perangkat lunak penampil posisi muatan. Sistem melakukan pembacaan sinyal dengan waktu sampling 100ms. Data berupa posisi diperoleh dari hasil proses integral ganda terhadap keluaran accelerometer yang berupa percepatan (grativasi). Dari hasil pengujian, didapatkan bahwa sensor memiliki kesalahan pengukuran percepatan kurang dari 8%. Sistem secara keseluruhan dapat mengukur percepatan dan diubah kedalam bentuk jarak pada 3 sumbu dengan kesalahan pengukuran jarak  3,061% pada sumbu x dan  0,36% pada arah sumbu y, serta 1,023% pada arah sumbu z. Jarak tersebut ditampilkan pada Komputer dalam bentuk grafik 3 sumbu, sehingga akan tampil sebuah garis yang merepresentasikan posisi muatan roket.

Cane is one of the sugar-producing plants. The quality of produced sugar is greatly influenced by main raw material, cane juice, so sugar content measurement in sugar cane is needed. In this study, measuring sugar content in cane juice is integrated with a PC system. In addition to cane juice, sugar solutions are used as an object in this study. Measuring devices are made using light propagation principle when passing through the object. The light source used is RGB bright LED, fiber optic as a propagation medium of ray, photodiode BPW 34 as a photodetector, Arduino UNO module as a microcontroller module, and digital refractometer to obtain comparable data. The results showed that the measuring instrument could be integrated with a PC system. Research on sugar solution shows that yellow light is able to provide the greatest change in the output of sensor system for each variation of solution concentration, and a calibration curve is obtained for further study on cane juice. Research on cane juice shows that there are still differences in the results of sugar content measurement from photodetectors to digital refractometers.

The battery pack is one of the potential parts to be developed on a laboratory scale. The battery pack is a unit of several rechargeable battery cells assembled in series-parallel. Battery packs are generally equipped with a Battery management system (BMS). BMS is an electronic circuit that functions to limit the current and voltage entering the battery in the charging process when the battery is full. This will certainly prevent short circuits and increase battery life. As one of the vocational education institutions, SMK are expected to be able to read and take advantage of existing opportunities related to the increasing number of national vehicles and the acceleration of battery-based electric vehicles according to Presidential Regulation number 5 of 2019. In line with the link and match agenda of vocational universities with SMK, this community service team took the initiative to collaborate with SMK together with PTV as a facilitator and SMK teachers as SMK partners. This training activity begins with preparing an electric vehicle battery pack prototype and testing it in the automotive engine laboratory, engineering drawing and computing studio and DUDI partner workshops. At the end of the training, an evaluation was carried out in the form of a questionnaire on the success of the battery assembly training activities using a linkert scale. As a result, the battery assembly training which activities are measuring and monitoring battery pack, increase the knowledge of teachers about how to assemble 18650 lithium ion batteries according to the requirements of the motor that is used.

Increasing the need for fuel oil is something that can’t be avoided, while the supply of fossil fuels is running low. Biodiesel is one of the right solutions to overcome this problem. This vast ocean in Indonesia, makes Indonesia the potential to create biodiesel from fish canning industry waste. The purpose of this research is to analyze the effect of dexlite fuel mixture with biodiesel from fish canning industry waste on fuel consumption and exhaust gas opacity in agriculture diesel engines. This type of research uses experimental research. The object of this research is the exhaust emissions and fuel consumption. The results of the study obtained by the researchers are the results of mixing dexlite of Pertamina (gasoil/high speed diesel oil) fuel with biodiesel of fish waste oil to be used in diesel engines. The highest exhaust gas opacity results in a mixture of 70% dexlite with 30% biodiesel (B30) of 2.6% at 1000 RPM (± 5). The results of the test fuel consumption that most quickly runs out occur in pure dexlite for 131 seconds in 10 ml of fuel at 1000 RPM (± 5). The results of testing the exhaust gas opacity level are increasing, as well as the results of testing fuel consumption which is increasingly economical, due to the high water, carbon and ash content in biodiesel.

Alhamdulillah, akhirnya Bunga Rampai dengan tema “Rekayasa Keteknikan Dan Teknologi Informasi Terapan” ini dapat diselesaikan oleh Tim Penulis dan diterbitkan oleh Polije Press. Buku ini merupakan karya cetak dari Polije Press yang merupakan satu unit yang baru dibentuk di Politeknik negeri Jember untuk mewadahi hasil karya tulis dari bapak ibu dosen serta mahasiswa di Politeknik Negeri Jember. Ada beberapa alasan yang mendorong didirikannya Polije Press. Pertama, perlu adanya wadah yang bisa menampung aspirasi dari kaum cendekiawan di kampus Politeknik Negeri Jember dalam mengembangkan keilmuan nya serta menularkan kepada generasi penerus melalui tulisan-tulisan atau karya ilmiah. Alasan kedua adalah kehadiran Bunga Rampai ini diharapkan akan memberikan sumbangan signifikan dalam upaya peningkatan kualitas Penelitian dan Pengabdian kepada Masyarakat di Politeknik Negeri Jember. Apalagi, peningkatan kualitas Penelitian dan Pengabdian kepada Masyarakat adalah salah satu bagian komitmen penting Politeknik Negeri Jember dalam rangka mewujudkan pendidikan tinggi yang berkualitas bagi masyarakat Indonesia. Dengan adanya Bunga Rampai ini, diharapkan civitas akademika Polije akan lebih mudah dalam mengikuti perkembangan di dunia penelitian. Tentunya, buku ini telah dikaji secara mendalam oleh Tim Editor Naskah Politeknik Negeri Jember dan disusun sesuai dengan Rencana Induk Riset yang ditetapkan oleh Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Negeri Jember. Atas kontribusi tersebut, kami ucapkan terima kasih. Mudah-mudahan kita dapat memberikan yang terbaik bagi kemajuan dunia pendidikan dalam rangka mempersiapkan generasi seratus tahun Indonesia Merdeka (2045).

The development of electric vehicles in Indonesia, especially the BEV (Battery Electric Vehicle) type, has received serious attention and support from the government. This is evidenced by the issuance of Presidential Regulation Number 55 of 2019 concerning the acceleration of the Battery-Based Electric Motor Vehicle Program for Road Transportation. Electric vehicles designed and developed in this study use an on-wheel BLDC type electric motor, Li-Ion batteries and are equipped with a watt hour meter to monitor battery consumption. The results of testing the accuracy and precision of the watt hour meter show a good value. This is evidenced by the difference in the measurement value of the watt hour meter against theAvometer and the difference between each repetition of the data 5 times which is below 1 Volt and 1 Ampere. Other test results show that the track with a large slope will also experience a large voltage drop, namely 0.8 V at a slope of 100 and the maximum current flowing is 8.35 A. Meanwhile, when the slope of the track is 70 and 60, the battery voltage decreases and the current flowing respectively are 0.5 V and 8.12 A; as well as 0.2 V and 7.84 A.

The conversion of agricultural land is an issue that needs attention because of the community's dependence on the agricultural sector and a serious threat to national food security with permanent impacts. Difficulty in irrigating agricultural land is one of the triggering factors for increasing land conversion, then a technology is needed to overcome this problem. The purpose of the implementation of this community service is to make irrigation system support equipment by utilizing renewable energy, namely solar panels. Solar panels are used as an energy source to drive the pump. To find out the effectiveness of the manufacture of solar-powered irrigation pumps, a performance test of the tool is carried out, namely testing of energy gain and water discharge. The solar-powered irrigation pump with a capacity of 800 Wp can operate properly which results in an average energy gain of 940.4 Wh with an average discharge gain of 1.84 liters/second.