Electrical Automation of Solar Cell-Based Arduino Uno With 16 × 2 LCD Display

Mohammad Irfan Fahmi (Akademi Manajemen Informatika dan Komputer Royal, Sumatera Utara, Indonesia)
Hidayatullah (Akademi Manajemen Informatika dan Komputer Royal, Sumatera Utara, Indonesia)
JhonsonEfendi Hutagalung (Akademi Manajemen Informatika dan Komputer Royal, Sumatera Utara, Indonesia)
Sajadin Sembiring (Universitas Sumatera Utara, Medan, Indonesia)

Proceedings of MICoMS 2017

eISBN: 978-1-78756-793-1

ISSN: 2516-2853

Publication date: 4 May 2018

Abstract

Research to find new energy source is still an intensive work by researchers in this field. One of the energy sources with no negative impact to environment is solar energy. Solar cell is used to convert solar energy to electrical energy. The electrically powered solar cell in direct current (DC) power is not suitable for our daily office equipment since they need the alternating current (AC) power. This research has succeeded in realizing a solar cell automation tool based on Arduino Uno with input from solar energy, from which output AC voltage can be used for the needs of household appliances and office equipments. Output power of this tool is approximately 700 W, which can turn on the lights, charge the hand phones, laptops, and so forth.

Keywords

Citation

Fahmi, M.I., Hidayatullah, , Hutagalung, J. and Sembiring, S. (2018), "Electrical Automation of Solar Cell-Based Arduino Uno With 16 × 2 LCD Display", Proceedings of MICoMS 2017 (Emerald Reach Proceedings Series, Vol. 1), Emerald Publishing Limited, Leeds, pp. 629-639. https://doi.org/10.1108/978-1-78756-793-1-00099

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Mohammad Irfan Fahmi, Hidayatullah, Jhonson Efendi Hutagalung, Sajadin Sembiring.

License

Published in the Emerald Reach Proceedings Series. Published by Emerald Publishing Limited. This article is published under the Creative Commons Attribution (CC BY 4.0) licence. Anyone may reproduce, distribute, translate and create derivative works of this article (for both commercial and non-commercial purposes), subject to fullattribution to the original publication and authors. The full terms of this licence may be seen at http://creativecommons.org/licences/by/4.0/legalcode


Introduction

Energy requirements are increasingly rising with the rate of growth of development in Indonesia. This is the same with the needs of electrical energy. Almost every field of development requires electrical energy in the process of its activities. This is understandable because the growth of development in our country is marked by the growth rate of the industry, both the medium and large industries, and all of them require electrical energy for lighting and to move the machines.

The search for new energy sources should meet the requirement that is generating a large amount of energy, economic costs, and no negative impact on the environment. One of the qualified energy sources is solar energy. By using solar cell, solar energy can be converted into electrical energy, both in the business world and the industrial world, and thus increase the electrical energy sources.

Solar cell (Photovoltatic cell) technology serves to convert solar radiation into electrical energy directly. Photovoltatic cell is usually packaged in a unit called a module. A solar module consists of many solar cells that are biased in a series or parallel arrangement. The solar cell became popular recently with the depletion of fossil energy reserves and global warming issues. Energy is also very cheap because the source of solar energy is very abundant and is biased to get for free (Rosidi, 2016).

In addition to industrial sectors, there are also still many other sectors that really need electric energy. One is for household purposes. Thus it is clear that the use of electrical energy is increasingly increasing. The need of 220 V alternating current (AC) power source is very important, for example, for the purposes of household appliances such as television, refrigerator, lighting, sterika, and so forth. Although it requires a high enough cost for solar cell. Solar power equipment (solar cell) is suitable for areas that are short of electricity or often power outages or for areas having absolutely no electricity.

The power generated by a single solar cell is so small that it takes some solar cells that are combined into a component that is called solar panel or solar module. Solar cell is the main equipment of solar power system that serves to convert mathar light energy into electrical energy directly. The output power generated from the conversion process is determined by some environmental conditions in which a solar panel is like the intensity of sunlight, temperature, the direction of sunlight, and the spectrum of sunlight.

The maximum power generated under these standard conditions is used as the output power of a solar panel and the selling price of the solar panel is determined by this power value. Unfortunately the standard test conditions are very difficult to find in real operating conditions (Fachri MR, 2015).

Literature review

Arduino is an electronic kit or open source electronic circuit board in which there is a main component, a microcontroller chip with AVR type from Atmel company. The microcontroller itself is a chip or IC (Integrated Circuit) programmed using a computer.

In general, Arduino consists of two parts, namely:

  • (1)

    Hardware in the form of input/output board (I/O) is an open source.

  • (2)

    Arduino software which is also open source, including Arduino IDE software to write programs and drivers for connection with computer

Figure 1. 
Breadboard Arduino (Syahwil, 2013, p. 24)

Figure 1.

Breadboard Arduino (Syahwil, 2013, p. 24)

The usefulness of the Arduino depends on us making the program. Arduino can be used to control the LED, control the traffic lights, and can also be used for robot design.

Currently there are various forms and types of Arduino boards that are adjusted to the designation, not only board (board) Arduino there is also another module ready to use (shield), as well as accessories such as USB adapter and so on.

Many programming languages are commonly used for microcontroller programs, such as assembly language. But Arduino programing language used the language C. Language C is a language that is very commonly used since the beginning of the computer was created and very instrumental in software development.

Arduino Integrated Development Environment (IDE) is a software provided at arduino.cc site designated as a sketch development tool and used as an Arduino ideas program (IDE), which means an integrated program development tool where various needs are provided and expressed in the form of menu-based interface. By using Arduino ideas, we can write a sketch, check for errors or not on sketch, and then upload a compiled sketch to an Arduino board (Abdul khadir, 2014).

Sensor and design module

Solar cells are thin layers made of pure silicon semiconductor (Si) and other semiconductor materials. Electric power generated by a single solar cell is so small that it takes some solar cells that are combined into a component called solar panels or solar modules.

Figure 2. 
Solar Panel Type – Monocrystalline and Polycrystalline

Figure 2.

Solar Panel Type – Monocrystalline and Polycrystalline

The solar charger controller can also be referred to as a battery regulator that serves as a device that regulates the charger process that is sourced from the electric current generated from the PV module to the battery and to adjust the discharger process to a load connected to a solar charger with a voltage of 12 V and a maximum current rating of 10 A.

Solar panel can actually be used directly without a solar charger or battery charger circuit, but this is not done because it can overload the performance of the panel due to excessive load and hence there will be fatal damage to the solar panel. In addition to this solar charger controller also secures the solar panels from the overload so that they are not easily damaged. If we want the output of electricity from this PLTS in the form of electric AC then the already discharged the direct current (DC) power must be connected to an electronic circuit/electronic module named Inverter DC–AC (Irawadi, 2016).

Figure 3. 
Solar Charge Controller Structure

Figure 3.

Solar Charge Controller Structure

The inverter is used to change the DC voltage from the accumulator to AC voltage in the form of a sine signal after going through the formation of wave and filter circuit. The resulting output voltage must be stable, both the amplitude and the frequency of the resulting voltage, the distortion should be low, there should be no transient voltage, and cannot be interrupted by a state.

Figure 4. 
Pulse Width Modulation Inverter

Figure 4.

Pulse Width Modulation Inverter

Generally high voltage generator consists of high-voltage back and forth (AC), high-voltage generator direction (DC), and high impulse voltage generator. High voltage back and forth is required, among others for dielectric testing, corona testing, dielectric strength testing, and resistance testing.

The high-voltage back and forth voltage is obtained from a one-phase transformer commonly referred to as a test transformer with a turning ratio much larger than that of a power transformer (Syahbi, 2012).

The series of high-voltage generating back and forth is shown in Figure 5.

Figure 5. 
High-Voltage Generating Circuit Back and Forth

Figure 5.

High-Voltage Generating Circuit Back and Forth

Miniature Circuit Breaker (MCB) (figure 2) is a circuit safeguard equipped with a thermal protection (bimetal) for overload protection and also equipped with electromagnetic relays for short circuit protection. MCB is widely used for single phase and triple phase circuit. Miniature Circuit Breakers (MCB) are designed with the main function to secure the cable against the overload (Pefrianus Bung, 2015).

Figure 6. 
Miniature Circuit Breaker

Figure 6.

Miniature Circuit Breaker

Batteries are one component of energy storage that can convert electrical energy into chemical energy and chemical energy into electrical energy. Many types of batteries can be used in this system. One is the lead acid battery.

This battery is made up of several electrochemical cells and each cell operates by using a positive electrode (anode) made of PbO2 (lead oxide) and negative electrode (cathode) of Pb (lead), while the electrolyte solution used consisted of sulfuric acid (H2SO4) and water (H2O). For a nominal 12 V battery it usually consists of six cells with each cell having a voltage of 2 V.

Research methodology

To assist in the preparation of this research, there is a need for a clear framework of work (Frame Work). This framework is a step that will be done in the discussion of the design of automatic electrical prototype. Hardware analysis will be done, each sub-module of the device used to know the basic working system only will be tested, and the circuit path of each module will also be discussed, so that when combined can form Arduino Uno Solar Cell Automation System With 16 × 2 LCD Display.

The Arduino R3 test is intended for proof, whether the command written in the Arduino R3 runs in accordance with the desired command. Arduino R3 test to be tested is done in two ways, that is testing by using Digital PIN and Analog PIN.

Figure 7 describes the value received from Analog PIN from LDR. When the LDR is given a light, the value will be enlarged and when the LDR is not lighted, the value on the monitor series will decrease.

Figure 7. 
Hardware Design Inverter Tools

Figure 7.

Hardware Design Inverter Tools

The design of the tool created is an overview of the tool whose working principle is used. From the results of the use of power generated from inverter of 10 W, AT8535 microcontroller, battery adapter, 16 × 2 LCD, and the circuit used inverter to supply 12 V DC battery turn on the switch directly.

In the inverter there is also a 5 V DC voltage which aims to power AT8535 and LCD Microcontrollers, the output generated in the design of this tool 10 W on the inverter that can re-recharge the battery by using the battery adapter.

Hardware design (Hardware) is designed according to the diagram shown in Figure 8.

Figure 8. 
Arduino R3 Testing by Utilizing Analog PIN

Figure 8.

Arduino R3 Testing by Utilizing Analog PIN

In this case, context diagram serves as a medium consisting of a process and some external entity. The context diagram in question can be seenin Figure 9.

Figure 9. 
Context Diagram Inverter Tool

Figure 9.

Context Diagram Inverter Tool

Results and discussion

LCD 1602 + I2C is tested to display information. So the movement information will be read on the Analog pin, and will be displayed. The use of I2C is enabled to reduce the use of Arduino R3 digital pins.

Testing solar cells is a test run on solar panels in which the input voltage source is the sunlight (DC voltage) and voltage storage is controlled using batteries and MCB after input voltage is processed. Then DC voltage is converted into AC with the help of an inverter at a voltage of 12 V. Finally the output (output) is in the form of glowing lamp.

Figure 10. 
Solar Cell Testing

Figure 10.

Solar Cell Testing

Hadware module we use is the of LCD 1602 + I2C, flow sensor, MCB, Inveter, and Arduino R3 controller. All these modules are merged into an Arduino Uno-Based Automation System with 16 × 2 LCD display.

Figure 11. 
Combination of Solar Cell Electrical Automation Module

Figure 11.

Combination of Solar Cell Electrical Automation Module

The program module we use is Arduino.IDE, writing controller application, done in Arduino IDE, writing sketch prototype automation of Arduino Uno Based Cell-Based Solar Cell with 16 × 2 LCD display in Arduino.IDE.

  • (1)

    Opening and writing in Arduino IDE 1.0.6.

  • (2)

    Open the Arduino IDE app, in this study, the Arduino IDE Persi 1.0.6 application after the Arduino IDE application is opened.

  • (3)

    Reading the Arduino R3 board device.

  • (4)

    Once the Arduino IDE app has been opened, the Arduino R3 board, connected to a USB computer, using a Type A USB cable. As the Arduino R3 board connects to the computer, the serial port on Arduino is Bewarna Hitam. To find out whether the Arduino board is connected or not, click tools.

  • (5)

    Serial monitor. As shown in Figure 12.

Figure 12. 
Display Arduino. IDE Connected to Board Arduino

Figure 12.

Display Arduino. IDE Connected to Board Arduino

If the Arduino board is not connected to the Arduino IDE computer, there must be an error on the PC USB PORT or the computer altitude. For Arduino board to display that is not connected to Arduino board.

The type of microcontroller or controller used is Arduino, with type R3. The selection of R3 type, due to the economical price, has enough digital port to support the system created.

Table 1.

Output Voltage Reading

No. Trial LED Minimum of Output Maximum of Output Object of Research
RX TX Lamp
1 On the File ON then OFF ON then OFF ON 3,3 5 Arduino R3
2 No The File OFF OFF OFF 3,3 5
3 On Going the File OFF OFF FLIP- FLOP 3,3 5

Testing is done by entering a program or a command on the Arduino controller and the output voltage is measured on the Arduino using multitester.

Figure 13. 
Test Results with Multitester, Maximum Output Voltage

Figure 13.

Test Results with Multitester, Maximum Output Voltage

The solar cell is a solar panel that serves to provide a source of voltage coming from a solar source (DC voltage). The Solar cell works by using a working voltage of 10 W. Tests are conducted to determine the minimum and maximum power.

Table 2.

Data Reading of Solar Cell, at 3.3–12 V

Power Data Sollar Cell Delay Information Object of Research
0 watt Not readed Off Not Corresponding Off Current sens cannot readed
5 watt Not readed Off Not Corresponding Off the lamp Current sens cannot readed
10 watt readed On Corresponding Light The lamp Current sens readed

Implementation of Arduino Uno Solar Cell Automation-Based Automation Device With 16 × 2 LCD display using solar cell, battery control, and inverter convert DC voltage into Arduino Uno-based AC by displaying temperature information on LCD 1602 + I2C. The purpose of designing this tool is to generate a change of DC to AC with a voltage source through a solar cell.

Conclusion and future work

This research has successfully developed a device capable of converting solar energy into electrical energy automatically and in real time. This study has succeeded in developing equipment that can convert DC electric power into 10 W AC power, so it can be utilized to fulfill the electrical power supply of office equipment or electronic equipment that is used everyday. It is expected that this research can be developed again so that it can produce a larger electric power by optimizing the storage of electrical energy generated by solar cells.

References

Irawadi (2016). Portable Power Plan Solar Cell. In Proceeding of National Seminar on Science & Technology Application (SNAST), November 26, pp. 332342.

Abdul Kadir, (2014), Introduction to Revision Edition Information Systems. Andi.Yogyakarta

Kierby , (2012), Charging mobile phone battery with solar cell, Faculty of science and technology Sanata Darma, yogyakarta

Rosidi , (2016), Design of Load Monitoring on Micro-Controlled Solar Cell System Using SMS Gateway, Study Program Strata 1 Engineering Engineering Techniques Faculty Of Engineering University Jember

Fachri MR, (2015) Monitoring of Arduino-based Solar Panel Parameters in Real Time, Jurnal Electrical Engineering, Vol 11. No.4 pp. 123128.

Muhammad Syahwil . (2013), Simple Simulation Guide and Arduino Microcontroller Practice. pp.125 Andi. Yogyakarta

, Pefrianus Bunga, (2015), Designing Remote Load Control Systems Using Smart Relays. (1) E-Journal of Electrical and Computer Engineering Vol.4 No.5 (2015), ISSN: 2301-8402

This work is supported in part by a grant from the Royal Education Foundation of Asahan and the University of Sumatera Utara.

The authors thank Prof. Dr. Herman Mawengkang from the University of Sumatra for his advice in writing this work. They also thank the fellow researchers in the Royal Computer Informatics Management Academy.

Corresponding author

Sajadin Sembiring can be contacted at
Prelims
Introduction
Acknowledgement I
Acknowledgement II
The Effect of Job Satisfaction and Work Motivation on Organizational Commitment and Organizational Citizenship Behavior in BNI in the Working Area of Bank Indonesia Lhokseumawe
The Effect of Work Motivation on the Employee Performance with Organization Citizenship Behavior as Intervening Variable at Bank Aceh Syariah
Life-Cycle Performance of a Bridge Subjected to Multiple Heavy Vehicle Impacts
The Efforts of Improving the Professionalism of Lecturers towards the Presentation and Change of KKNI within the University Environment in Aceh
Morphological Process of Devayan: An Analysis of Morphological Tipology
Effect of Freight Transportation for Regional Development in the North Zone of Aceh
The Roles of Digital Democracy on Political Education for Young Generation
Disorders of Sex Development: Ambiguous Genitalia and Partial Androgen Insensitivity Syndrome
Difference Analysis of the Autonomy of Extended Regencies in Aceh Province Indonesia
An analysis of Service Quality on Mustahiq Satification using the Kano Model (Case Study on Baitul Mal)
Exploration and Morphological Characterization of Vegetative Part of Avocado at Bebesan Subdistrict Central Aceh District, Indonesia
Poverty Effectiveness for the Maisir (Contest) in the City of Indonesian Aceh Province
Measurement of Study Productivity and Evaluation Analysis by using the American Productivity Center (APC) Model at a Palm Oil Factory (Pks PT. Syaukath Sejahtera)
The Development of an Independent Entrepreneurship Model Through Creative Economy for Women in Lhokseumawe City
Regionalism of Aceh’s Traditional Architecture at Bujang Salim Mosque at Krueng Geeukeuh, Aceh
High Growth and Diameter of the Stem of Corn Plants (Zea May, S) with a Different Cropping Pattern
Influence of Manufacture of Textiles, Clothing, and Leather and Manufacture of Paper, Printing, and Publishing on Economic Growth
Land Erodibility and Land use Directions in Krueng Seulimum Watershed Aceh Province
The Effect of Fermentation of the Peel of Arabica Coffee with Win Prob Probiotics on Crude Fiber Content and Fiber Fraction
Teaching English International Lingua Franca (ELF) in ASEAN Economic Community Context: Teachers and Students Perspectives
Animation as a Creative Industry: A Strategy to Build Creativity and Independence of Youth in Padang, West Sumatra
Improving Production of Liquid Smoke from Candlenut Shell by Pyrolisis Process
Interpersonal Communication of Commercial Sex Workers Transaction with Customers in Syariah Law Area in Indonesia
Macrozoobentos Diversity Index as a Bioindicator in Krueng Cunda River to Support the Success of the Shrimp Agribusniness at Lhokseumawe City, Aceh
The Examination Model of Aceh Commodity Export Firms’ Performance
The Role of Fishing Techniques with Tuah Teng on Food Security in Facing the Asean Economic Community
Reconstruction of Aceh Cultural Identity in the Discourse of Aceh Language Lesson Books in Elementary School
The Effect of Monosodium Glutamate (Msg) Administration to Pyramidal Cells Necrosis on Cerebral Cortex of Wistar Male Rats (Rattus Norvegicus)
Personal Construct Experience of Tionghoa Community in Aceh Reality
Study of Mineralogy Composition, Total, and Exchangable Content of K, Ca, and Mg of Volcanic Ash from Sinabung Mountain Eruption in North Sumatera, Indonesia
The Role of Law in Economic Development: To Develop a Special Economic Zone in Order to Build a National and Regional Economy
Model Corporate Social Responsibility Based on Local Wisdom in West Aceh Regency
Recurrence of Intravenous Leiomyomatosis: A Rare Cause of the Obstruction of the Right Heart
Single Mother Role in The Success of Their Children (Phenomenological Study of Single Women in Makassar City)
Optimal Lot-Sizing Algorithms on Stochastic Demand at the Retailer
Predict Environmental Conditions Using Groundwater Interpretation in Subdistrict Hamparan Perak, Deli Serdang, North Sumatera
Public Discovery of the Concept of Time Value ofMoney with Economic Value of Time
Study on Impact Strength Against Welding Smaw on Hardening Steel AISI 1050
What is the Determinant of Non-Performing Financing in Branch Sharia Regional Bank in Indonesia
Spatial Stochastic Modeling of Adolescent and Under-Five Children Nutritional Status: A Case Study from Aceh, Sumatera Island, Indonesia
Religious Tourism: Concept of Community-Based TourisminAceh Singkil, Indonesia
The Contribution of Revenue and Consumption Cost of Soybean Farmers in Muara Batu Subdistrict Aceh Utara
The Composition of Women Parliament Members Presence in Local Parliament in Aceh (A Case Study at Provincial Parliament of Aceh Province During the Period of 2014 to 2019)
Personal Branding Tri Rismaharini the Provision in Media
Analysis of Factors Affecting the Poverty Level of Farmers Post-Tsunami in Aceh
Dimension of an Islamic Model Value on the Existence of Syariah Walmart
Batik Jambi Promotion Based on Social Media in Asean Economics Community
Islamic Banks in Indonesia: Analysis of Efficiency
Design of Information Monitoring System Flood Based Internet of Things (IoT)
Economic Development and Access to Fish Resources: A Review Sociology on Fisherman’s Production Access in Kuala Langsa, Aceh
Dynamics and Prospect of Wali Nanggroe Institution Post-Conflict in Aceh: Analysis of Policy and Educational Development
Learning Management of Bahasa in Senior High Schools
The Difference in the Antimicrobial effect of Katuk Leaf Extract (Sauropus Androgynus (l.) Merr.) Concentration against Escherichia Coli
City Branding of Denpasar City as a Creative City Through the Denpasar Festival Event
Semantics Equivalence of Cultural Terms of Meurukon Texts Translated from Acehnese into Indonesian
Preparation of Activated Carbon From Banana (Musa acuminate L.) peels for Carbon Monoxide Adsorption
Thermal Behavior of Modified Thermoplastic Starch (TPS) Synthesized from Sago (Metroxylon Sagu) with Diphenylmethane Diisocyanate and Castor Oil
Typhoid Fever Profiles at Cut Meutia Hospital, North Aceh, Indonesia, in 2016-2017
Student Radicalism Ideology Prevention Strategy: A Study at an Islamic Boarding School in Jabal Nur, North Aceh, Indonesia
Implementation of Task-Based Learning for Non-English Students: A Practice in Malikussaleh University
Design of Wild Animal Detection and Rescue System with Passive Infrared and Ultrasonic Sensor based Microcontroller
Policy of Educational Budget Aceh Regency
Foreign Direct Investment Inflow into Aceh province of Indonesia After a Peace Agreement
Design of Web Based Fire Warning System Using Ethernet Wiznet W5500
Sari Cincau Ngrayun Equals with Modern Ready-to-Drink Beverage
The Status of Conservation of Mangroves in the Krueng Reuleng River Area, Leupung, Aceh Besar Regency, Indonesia
Analysis of Understanding the Level of Vibration and the Wave Concept with a Demonstration Method for Students in SMAN 1 Peureulak, Aceh
Screening of Volatile Organic Compounds Using Gore-Sorber Method for Predicting Hydrocarbon Generation
Incorporating Peace Education into Aqidah Akhlak Subject in East Aceh
Learning Motivation of Peripheral University Students and its Relation with their English Grades
Thermal Cracking of Low Temperature Conversion on Low Density Polyethylene Plastic Waste for Liquid Hydrocarbon
Correlation of Lead and Zinc Contents in Sediments And Faunus Ater Against Faunus Ater Density in Reuleung River, Leupung, Aceh Besar
The Correlation between Stress Level and Degree of Depression in the Elderly at a Nursing Home in Lhokseumawe in the Year 2017
Effect of Palm Oil Bunches Microfiller on LDPE-recycled Composite Tensile Strength through Melt Blending Process
CSR and Profitability in IDX Agricultural Subsectors
The Crown Witness and the Protection of Human Rights in Criminal Law Verification
Design and Implementation of SCADA Wireless Communication System for Monitoring the Performance of Microhydro Power Plant Based on Protocol AX.25
Production of Lipid Biomass in Locally Isolated Microalga Cultivated in Palm Oil Mill Effluent (POME)
An Analysis and Design of a Virtual Collaboration Information System of the Jamu Supply Chain Network Based on a Fair Adaptive Contract
Adsorption of Manganese (II) Ion in the Water Phase by Citric Acid Activated Carbon of Rice Husk
Eco-informatics: The Encouragement of Ecological Data Management
Challenges in Designing ESP Course for First Year Students of Engineering Faculty at Malikussaleh University
Isotherm and Kinetics of Cd(II) Adsorption by Durian (Durio zibethinus) seed Immobilized into Ca-alginate
Science, Technology, Engineering, and Mathematics (STEM) Learning on Student’s Science Process Skills and Science Attitudes
Effect of Perception of Facilities, Intensity of Conduct, and Satisfaction of Tax Payers to Submission of Letter by E-Filing Notice on Tax Service
Aceh: Conflict Development after the Helsinki Agreement
The Discretionary Accrual in the Financial Statement of a Public Company in Indonesia: A Literature Review
Inventory and Morphological Characterization of Durian (Durio Zibethinus) in Langkahan and Sawang Sub-District of North Aceh Indonesia
Model of Sustainable Electrical Power Management: Lamp Efficacy of the National Street Lighting in North Sumatera Province
Hamming Index for Some Classes of Graphs with Respect to Edge-Vertex Incidence Matrix
Electrical Automation of Solar Cell-Based Arduino Uno With 16 × LCD Display
Concept Designs of Patient Information Security Using e-Health Sensor Shield Platform on Blockchain Infrastructure