Indonesia receives solar energy with an average daily energy radiation per unit area per unit time of approximately 4.8 kilowatts / m2. Solar energy is one of the abundant, pollution-free, renewable energy sources and can be explored optimally. In the use of solar energy, it is necessary to develop a technology that is able to convert solar energy into the desired energy, namely electricity. The supply of electrical energy during the day can still be controlled by the solar cell, while at night it is controlled by a battery of 3600 mAH. This technology is known as solar cell or in the international world better known as solar cell or photovoltaic. Solar cell is a tool to convert solar energy into electrical energy. Photovoltaic is a technology that functions to convert or convert solar radiation into electrical energy directly. Single chip AT89S51 was used as a controller in the drying process electronically. It was an easier way to dry the clothes without having to wait for good weather. SHT sensors was used to detect room temperature and humidity in the dryer, push button switches were used as switches to determine the limits of temperature and humidity. Rotary dryer is a dryer which is shaped as a drum and rotates continuously which is heated by a heater. A rotary dryer consists of a rotating cylinder and is used to reduce or minimize moisture in the contents of the material and its handling is direct contact with the heat in the drying chamber. The design of the rotary dryer system for the drying process of tea leaves requires a setting temperature of 90 o C with a drying time of 15-25 minutes. The energy needed to supply power in the rotary dryer is 1000 WH.
Elektrostimulator combined in acupunture therapy to provide the stimulation of electric energy at the point of the meridians of the body. Granting the power to create a balance of energy (chi) in the body. In administering the energy must pay attention to the voltage waveform, intensity, frequency and timing of stimuli. The purpose of this research is to change the system tools from analog into digital by changing the settings of the timer and frequency using the keypad that is controlled using the Microcontroller ATMega16. Specifications of the simulation tool elektrostimulator acupunture designed include the frequency setting of 5-100Hz, setting the intensity of a voltage 0 timer setting until 25Vac 60 minutes and has a spike waveform mode continou and electrodes used floating types. The test result show that simulated acupunture elektrostimulator tool result obtained in accordance with the compliance with the specifications but there is little the percentage error of frequency deviation i.e. 0.47% deviation of the timer of 0.29%, intensity of the voltage deviation of 0.073 % and waveform was nearing the same against his theory.
INTISARIPada naskah ini akan dilakukan analisis nilai tegangan dan arus pada Alat Kontrol Intensitas Lampu Jalan Otomatis Tenaga Surya. Data tersebut diperoleh dari hasil pengujian alat terssebut dengan waktu/jam yang berbeda-beda untuk mengetahui efektivitas cahaya matahari dalam mengisi daya solar panel. Alat tersebut dibuat agar hemat energi dan sebagai energi alternatif. Sumber utama dari penerangan ini adalah dari energi matahari yang dikonversi oleh panel surya menjadi listrik, dan baterai atau aki berfungsi sebagai penyimpan energi listrik yang akan menyalakan lampu pada malam hari. Oleh sebab itu, apabila listrik PLN mengalami gangguan atau mati listrik maka penerangan jalan ini tidak terpengaruh.Dari alat di atas, diperoleh hasil pengujian untuk variable tegangan arus. Selanjutnya akan dianalisis pengaruh waktu/jam terhadap pengambilan data nilai tegangan dan arus. Pada data waktu pengisian panel surya, rata-rata tegangan dari solar cell sama yaitu 19,54 volt dan median (nilai tengah) sebesar 20 volt serta nilai rerata arus sebesar 0,81 A dan median sebesar 0,8 A. Semakin siang maka arus yang masuk ke baterai semakin besar karena energi dari sinar matahari berada pada puncaknya yaitu pada jam 11:00 sampai 13:00, kemudian semakin sore maka arus yang masuk semakin kecil karena sinar matahari yang diterima solar cell sudah tidak optimal.Kata kunci— solar panel, tegangan, arus, energi matahari ABSTRACTIn this paper, an analysis of the value of voltage and current will be carried out on the Intensity Control Tool for Automatic Solar Street Lights. The data was obtained from the results of testing the tool with different times/hours to determine the effectiveness of sunlight in charging solar panels. The tool is made to save energy and as an alternative energy. The main source of this lighting is from solar energy which is converted by solar panels into electricity, and the battery or battery serves as a store of electrical energy that will turn on the lights at night. Therefore, if the PLN electricity is interrupted or there is a power failure, the street lighting will not be affected.From the above tool, the test results are obtained for the current voltage variable. Furthermore, it will be analyzed the effect of time/hour on data retrieval of voltage and current values. In the solar panel charging time data, the average voltage from the solar cell is the same, namely 19.54 volts and the median (middle value) is 20 volts and the average current value is 0.81 A and the median is 0.8 A. The amount that goes into the battery is getting bigger because the energy from sunlight is at its peak at 11:00 to 13:00, then later in the afternoon, the incoming current gets smaller because the sunlight received by the solar cell is not optimal.Kata kunci— solar panels, voltage, current, solar energy
Mortality rate by heart disease in Indonesia is up to 26%. To prevent the higher of mortality rate by heart disease, an early examination for heart can be done by taking the record of electrocardiograph. The record was analyzed to know the heart rhythm that can be indication of heart disorder. By applying the warning of heart disorder, the heart condition and the treatment can be known rapidly.Electrocardiography record can be done in a short time, i.e. for 5 minutes (short term). Analyzing method in the time domain is the simplest way to analyze the variation of the heart rate. Analyzing in the time domain for R interval and the heart rate can be done by histogram and statistical analysis. Measurement method in the time domain is divided into two parts statistically, i.e. directly measurement for normal condition in R interval or the heart rate include the average value, and the standard deviation.The wavelet method was used in the QRS detection method in this research. Wavelet was designed to signal data processing, data filtering, thresholding, and histogram, to acquire the average of QRS wave, and its deviation standard. The benefit of the wavelet method can obtained the negative deflection value for Q wave with the amplitude 25% of R wave, R wave obtained positive deflection with the amplitude 1,6 -3 mV, and negative deflection for S wave has the amplitude between 0,1 mV up to 0,5 mV.
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