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All Journal Harmonia: Journal of Research and Education Jurnal technoscientia Gadjah Mada International Journal of Business JURNAL TEKNOLOGI TECHNOSCIENTIA

Subandi -

Institut Seni Indonesia Surakarta, Jl. Ki Hadjar Dewantara no.19 Surakarta

Author-ID : 208569

Arts Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PEMBANGKIT LISTRIK ENERGI MATAHARI SEBAGAI PENGGERAK POMPA AIR DENGAN MENGGUNAKAN SOLAR CELL -, Subandi; Hani, Slamet
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 7 No 2 Februari 2015
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

This paper discusses the application of solar cells as an electric power source and the electricity generated is used to a drive water pump. The working principle of solar power plants is the conversion of energy contained in to electricity. When these photons strike the surface of the solar cell electrons will be excited and generate electric voltage. Electricity generated from the solar cell is direct current (DC) to charge a battery, which in turn is converted into alternating current (AC) using an inverter. The testing stage carried out in the field is to find the to main parameters whichare the voltage and amperage. Battery is charged by the solar cell to accumulate the solar energy into electrical energy. The produced solar cell voltage ranges from 14.8 to 17.5 volts DC. The Solar cells used are of panel type polycrystalline (poly-crystalline) with a power of 50 wp. Current and voltage of the solar cell source varies depending on the incident sunlight power the cell voltage is Â± 17V, but charging the battery the average voltage is 13,5V which is secured by the solar charger controller. Voltage and current will begin to rise in the morning at 07.00 am, then reach the maximum level during the day at 10:00 a.m to 13:00 p.m, and begin to fall in the afternoon.

SISTEM KUNCI ELEKTRONIS DENGAN PEREKAM WAKTU AKSES BERBASIS MIKROKONTROLER AT89C51 -, Subandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscentia Vol 1 No 2 Februari 2009
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The technology development nowadays, especially electronic technology has been reaching great strides. Every technology in almost any sector needs electronic device. As a door lock, now, can used electronic technology as its controller system. To make electronic key system has few steps. First, make planning to design electronic and mechanic system of the door lock. Second, design the hardware and drill PCB followed by assembly the electronic component. Third, design software by using algorithm from system. Fourth, flash the assembler program into the IC AT89C51 and set it to hardware, next test the completed system. Microcontroller system on that application connected to another interface like as ADC, DAC, LCD etc. The finishing from the system is checked. The result, this system can be applied to door lock system with time recording access. It uses Real Time Clock (RTC), Line Port Terminal (LPT), IC AT89C51 and hand phone Siemens M35i as the interface system.

SISTEM KENDALI PEMICUK LEDAK DENGAN DETONATOR LISTRIK MENGGUNAKAN TELEPON GENGGAM BERDASARKAN SMS (SHORT MESSAGE SERVICE) -, Subandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The use of explosives/bomb was always considered bad and frighten for society because of the recent terrorist act. In fact, not only in the military field, Bomb can be used for construction (reconstruction), mining exploration, dramatization movie scene or something else, but can not be denied its high risk. Be clear about the bomb technology is not widely explored whether the explosives themselves, trigger/detonator, especially control systems.Control using a Mobile based on SMS has been used widely, considering the advantages of this control that it is low cost, wide coverage, and do not need to design the transmitter and receiver. The message sent is the format of PDU (Protocol Data Unit), but is converted to text for easy monitoring, a microcontroller with at-command (command function for HP) will read and recognize those formats to start the next action according to the instructions sent via message. By Sending an SMS (boom) to the mobile server, then messages are forwarded to the microcontroller. The results show that the system works well if the character that is sent in complaince then the microcontroller will execute the program to activate the electric detonators, the ecplosive will be ignited and successfully detonated.

MONITORING DAN PENGENDALIAN SUHU MENGGUNAKAN MEDIA GPRS PADA PONSEL GSM -, Subandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 5 No 2 Februari 2013
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The temperature forms the importan aspect on the life. There are a lot of activity which was under the influence of the condition of temperature. Because of that, monitoring system and controlling the temperature is necessary. Therefore, making the equipment which able to monitor and control the temperature is necessary. This interface will applied on the room where needs controlling the temperature. For example, laboratory or meeting room. Monitor and controller in wireless manner become choice on the controlling long distance. This analysis heavily on the activity of temperature censor and relay which be connected on the fan for the stimulation. The temperature of the room information and send to microcontroller what will work by automatically contact the PC through LPT or port printer for the parallel communication. All of the data will be processing and connecting to the web as an internet aplication on the PC. We can choice menu to control and monitor temperature of the room through GPRS media on the GSM telephone cellular from the connection of the internet. Microcontroller which used is microcontroller AT89S51.

SISTEM APLIKASI KRAN OTOMATIS UNTUK PENGHEMATAN AIR BERBASIS MIKROKONTROL Atmega 16 -, Subandi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 6 No 2 Februari 2014
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Conventional faucet by twisting operation can be replaced with automation systems for the purpose of easy operation and to save water. Solutions to these can be solved utilizing electronic technology. With the use of sensors on the electronic switch circuit faucet and filling water in the reservoir will work automatically according to the expected circumstances. Thus the tap to remove the water and do not need to stop playing, because tap water out if a member body directed to the front of the sensor and stop the flow water if it is not directed at members of the body. While in the reservoir, water will always be awake capacity so there is no excess water runs out or when charging. In detecting the presence or absence hand directed towards utilizing sensor ultrasonic and as overall system control using AVR microcontroller atmega16. While on the test results show that there are differences in the amount of water volume released on automatic washing appliance less the regular tool so that there is efficient use of water. Based on the testing tool can be run well and as a tool in this thesis is a simulation then to apply it in real conditions necessary adjustments to take into account such things as the distance between the electrodes used in the reservois, the distance between sensor ultrasonic and distances between each faucet. This system will work automatically turn on the faucet using ultrasonic sensors as an object detector.

SISTEM MONITORING DETAK JANTUNG MENGGUNAKAN MIKROKONTROLER Santoso, Gatot; -, Subandi; Hani, Slamet; Nugroho, Agung Wahyu
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 12 No 1 Agustus 2019
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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The heart is a human organ that has a vital function. Small flaws in the heart organ can have a big effect on our body. In general, our heart beats around 60-100 times in one minute. If you exceed 100 times and less than 60 times every minute means your heart is experiencing an abnormal beat. Because some patients who suffer from heart need the automation of early detection. The development of electronic technology makes it possible for heart examinations to be carried out by the patient himself. This research aims to design and build a device to monitor heart rate using a microcontroller. Noise suppression on the ECG signal, heart rate data that has been detected and processed will be compared with normal and abnormal values â€‹â€‹of the heartbeat. Furthermore, the microcontroller will determine how the heart condition is detected. From the results of the study the heart rate monitoring system using a microcontroller input voltage of 3.7 V DC was changed by the step up module to 5 V DC with a magnitude of error percentage of 0.863% and a charger module used to charge batteries with 4.2 V DC voltage and the magnitude of the error percentage amounted to 0.119%. The amped pulse sensor has an output voltage value of 2.4 V when it is relaxed and 2.6 V when it is beat, and this sensor has a constant and significant output voltage value in accordance with the rhythm of the heartbeat. The heart rate monitoring tool that is made can measure accurately and precisely, because it has a fairly small average error value of 1,727%.

Co-Authors Agung Wahyu Nugroho, Agung Wahyu Bagus Riyono Fathul Himam Gatot Santoso Slamet Hani, Slamet

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