Makalah ini dilatarbelakangi oleh adanya kebutuhan masyarakat terhadap sterilisasi barang-barang yang diperoleh dari jasa pengiriman barang selama pandemi Covid-19. Dengan adanya kebutuhan masyarakat tersebut, jasa pengiriman dan logistik melakukan sterilisasi berupa penyemprotan cairan disinfektan pada paket yang keluar masuk sehingga berdampak pada basahnya paket. Oleh karena itu, perlu satu upaya baru untuk melakukan sterilisasi barang dan logistik agar barang dan logistik yang diterima atau dikirim tetap dalam kondisi baik. Disinfektan ultraviolet C (UV-C) merupakan upaya baru tersebut. Dalam makalah ini, telah dibuat rancangan sebuah sistem disinfektan UV-C untuk sterilisasi paket melalui konveyor mini. Selanjutnya, dibuat area sterilisasi sistem disinfektan UV-C berukuran panjang 90 cm, lebar 50 cm, dan tinggi 50 cm. Sistem disinfektan UV-C yang dirancang membutuhkan daya lampu UV-C sebesar 161,77 watt untuk sterilisasi pada sistem disinfektan UV-C. Hasil pengukuran iradiasi sistem disinfektan UV-C digunakan untuk menghitung lama waktu paparan UV-C. Berdasarkan hasil perhitungan, sistem disinfektan UV-C yang dirancang mampu membunuh hingga 90% virus corona dengan lama waktu paparan UV-C terhadap paket dalam area sterilisasi minimal 16 detik.
ABSTRAKGas HHO atau brown gas merupakan suatu materi yang dapat menghemat penggunaan BBM dan menurunkan emisi gas buang bila ditambahkan pada pembakaran BBM. Untuk meningkatkan produksi gas HHO ini, maka perlu ditingkatkan kinerja dari sel electrolyzer yaitu suatu alat yang dapat memisahkan air menjadi hidrogen dan oksigen dengan menggunakan sumber listrik arus searah melalui proses atau pengurai cairan. Salah satu cara untuk meningkatkan kinerja sel electrolyzer adalah dengan melihat pengaruh dari tegangan listrik terhadap karakteristik kerja sel electrolyzer dengan variasi bahan elektroda. Dari hasil pengujian 10 variasi pasangan elektroda, terlihat bahwa bahan elektroda yang menghasilkan laju produksi gas HHO paling cepat dalam waktu 300,67 s yang menghasilkan 200 mL dicapai oleh pasangan elektroda yang menggunakan anoda aluminium (Al) dengan katoda aluminium (Al) atau tembaga (Cu). Pada pengujian ini dipilih elektroda berbahan aluminium dan tegangan pada pengujian yang ditentukan dengan tujuan untuk melihat karakteristik sel electrolyzer. Hasil pengujian menunjukkan semakin besar nilai tegangan yang diberikan maka nilai arus pada sel electrolyzer semakin meningkat, hal ini juga akan mengakibatkan suhu yang semakin meningkat serta waktu produksi gas yang dicapai sebanyak 200 cm3 semakin singkat.Kata kunci: Elektroda, Gas HHO, Sel electrolyzer
AbstrakThe quality of cooking oil sold in the market needs to be checked to ensure its health. cooking oil quality detector is designed to make it easier for the public to know the quality of the cooking oil. The research method is to make tools and conduct testing. The test is carried out by measuring the viscosity and density using the tool made. When the viscosity of 985 fuzzification was "good", and the density was 542.93 Kg/mL of "good" fuzzification, the fuzzification was processed by a fuzzy inference system, then defuzzification occurred in the form of oil quality results. fried "good". When the viscosity of 932 fuzzification is "sufficient", and the density is 618.69 Kg/mL of "moderate" fuzzification, a fuzzy inference system occurs, a defuzzification process is "moderate", when the viscosity of 926 fuzzification is "bad", and a density of 631.31 Kg/mL fuzzification "bad", fuzzy inference system occurs, defuzzification process occurs with "bad" results. To ensure that the results are accurate, the sample is taken to the BPOM which measures free fatty acids. From the BPOM test results converted to viscosity and density. In order to obtain an accurate conversion value between viscosity and density, it is recommended that a large number of samples be tested..Keywords: viscosity, density, fuzzy logic
Indonesia is one of the areas prone to disasters, especially floods. The impact of flooding can be reduced if the community is better prepared to face the coming flood. Therefore we need an early flood detection tool that can give a signal to the community through early warning so that the community can be more alert in facing flood disastersThe results of this design make two systems, the main control system and the receiving system. The main control system consists of an ultrasonic sensor, SIM800L module and NodeMCU Wi-Fi module. The receiving system consists of a SIM800L module and a siren. The results showed that the ultrasonic sensor used has a good level of accuracy with an error value <1%. The results of SMS testing have a delay until the SMS to the recipient is around 5-10 seconds. The test results also show that 4G network technology has 100% delivery accuracy and 3-4 seconds delivery delay per data. The final result shows thatthe system is able to work as desired and is able to be well connected to the web server.Keyword:Flood Disasters, SIM800L, Ultrasonic sensor, Web Servers, SMS
This research develops a prototype of a remotely controlled lawn mower using Android smartphone with Bluetooth connection to avoid the risk of accidents. The lawn mower is controlled by an Android application developed with Mit App Inventor using HC-05 Bluetooth module connection. This prototype uses a DC motor as a driving motor to rotate the blade with an LM393 speed sensor using Arduino Uno microcontroller. The developed system is equipped with an option of grass height that can be adjusted. The test of HC-05 Bluetooth module resulted the maximum acceptable connection distance in the open space is 80 m and the maximum connection distance with a barrier is 10.45 m. DC motor speed tests are carried out on the lawn mowers at no load and loaded conditions. The results showed a slight decrease in motor speed at the grass height of 6 cm and 4 cm, but at 2 cm height the rotation dropped significantly.Keywords: lawn mower, remote control, Arduino Uno, Bluetooth, Android
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