Anis Nismayanti
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Plant Watering System Design Using Soil Moisture Automatic Sensor Microcontroller Based Sen0057 ATmega328P Gani, Sitti Hardianti; Musa, Moh. Dahlan Th.; Nismayanti, Anis
Gravitasi Vol 13, No 1 (2014)
Publisher : Gravitasi

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It has been designed and created a plant watering system that is expected to help watering plants from a manual system to an automated system. The watering system is designed for watering plants at the right time and humidity. This tool utilizes SEN0057 soil moisture sensors to detect the level of soil moisture and ATmega328P microcontroller as the main controller. This tool is also used as a stop relay contact or disconnect from the current to flow to the pump, the LCD to display the time and the level of soil moisture and pump to drain the water. The working principle of this device when the sensor detects kelambaban ground level is less than the pre-defined limit, the microcontroller will command the process of watering until the soil moisture value equal to or greater than the pre-defined. Pepper plants as objects of research have suitable soil moisture ranging from 50% - 60%. Thus limits for soil moisture for plant watering is 3:38 volts. Watering the plant is operated at 5:45 pm and 17:45 pm.Keywords: Soil Moisture Sensor SEN0057, ATmega328P, Relays
Rancang Bangun Prototipe Detektor Banjir Nirkabel Pada Sungai Berbasis Arduino Uno Menggunakan Sel Konduktif Rahmadi, Erwan; Nismayanti, Anis; Sesa, Elisa
Gravitasi Vol 15, No 2 (2016)
Publisher : Gravitasi

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ABSTRAKKejadian banjir terkadang sulit dideteksi datangnya karena dapat terjadi secara tiba-tiba dan menimbulkan kerugian yang cukup besar bagi masyarakat. Untuk itu dibutuhkan suatu sistem peringatan dini banjir sebagai hal yang sangat esensial. Pada penelitian ini, dibuat prototipe pendeteksi potensi banjir pada sungai berbasis Arduino. Alat ini diharapkan mampu memonitoring tinggi permukaan air sungai yang berpotensi banjir. Alat ini terdiri dari sel konduktif, modem dan papan Arduino. Prototipe pendeteksi potensi banjir ini telah dibuat dan bekerja dengan baik. Apabila sensor konduktif terendam air maka sensor akan mengirim sinyal ke mikrokontroler. Selanjutnya mikrokontroler akan mengendalikan modem untuk mengirim SMS.Kata Kunci :  Pendeteksi banjir, arduino ,sensor konduktif, modem, SMS
STUDI UJI KARAKTERISTIK FISIS BRIKET BIOARANG SEBAGAI SUMBER ENERGI ALTERNATIF Arni, Arni; Labania, Hosiana MD; Nismayanti, Anis
Natural Science: Journal of Science and Technology Vol 3, No 1 (2014): Volume 3 Number 1 (March 2014)
Publisher : Univ. Tadulako

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Research has been conducted the testof physical characterization biocharcoal briquettes,results of mixing charcoal and organic waste with adhesive ofsticky rice flour. This study is follow of previous study using the same material to determine the effect of variations in composition, which is then tested against moisture content, calor value, ash content and carbon content. In this study, the results of mixing biocharcoal briquettes are made in several form and then made ??the ultimate testing(moisture content), compressive strength and density of each form of briquettes.  The application of boiling water to each form variation of briquettes using briquette stove. Based on the results of physical tests conducted, found that the cylindrical briquettes providing good quality, because it has a low moisture content of 4.87 %, high compressive strength 16.2 N/m2, high density 0.50 kg/cm3and  requiredthe time of boiling water 500 ml very quickly where the temperature of coal briquettes reaches 787.9 ° C , ash 76.05 grams and efficiency52.07 %.