Attendance is a data collection activity to determine the number of people present at an event. Every activity always requires information about participant attendance. This also happens in the learning process. The benefit of attendance using an Arduino based RFID scanner is that it makes it easier for attendance officers to input practical data because they can retrieve and store attendance data from RFID tags directly. Research on the development of attendance to become more effective in the education sector. Every activity that requires information about participant attendance will definitely utilize the use of tools that are used as proof of participant attendance, while teacher attendance currently used is using fingerprints. When absent, problems often occur, namely the finger that will be used to do the fingerprinting. Based on the background above, the author created automatic attendance to make attendance easier while at the agency where the teacher teaches. Meanwhile, the barcode scanner is a faster data input process compared to the manual method. This input process can be done with a scanner to record the data contained in the barcode quickly, so it doesn't need to take a lot of time.

Currently in Indonesia there is a pandemic caused by the Corona Virus. The virus can cause disorders of the respiratory system to death. This virus is a new type of coronavirus that is transmitted to humans. The Corona virus can attack anyone and has spread rapidly to many countries, including Indonesia in just a few months. Abdiel Theological College (STT Abdiel) is one of the educational institutions in Ungaran that uses hand sanitizers to prevent the spread of the Corona virus. The hand sanitizer is still used manually, namely by holding it and pressing it. This does not guarantee the efforts to prevent the spread of the Corona virus. Therefore, a non-contact automatic hand sanitizer is needed in the campus environment.The purpose of this research is to make a prototype of a touchless automatic hand sanitizer based on the ultrasonic sensor HC-SR04 and arduino which is programmed using the C++ programming language with Arduino IDE software. In making this prototype, the researcher also uses a relay that is connected to a micro pump and hose which then sprays hand sanitizer automatically when a hand object approaches or is within the range of the ultrasonic sensor.The method used in making this automatic hand sanitizer prototype is the R&D (Research and Development) method. The result of the automatic hand sanitizer that has gone through validation testing by an expert and trials by users is that the prototype is able to spray hand sanitizer liquid automatically when the sensor detects an object. The automatic hand sanitizer prototype can be refilled easily, portable, and effective in minimizing the transmission of the Corona virus.

Electrical equipment plays an important role in everyday life, from households, schools, hotels, offices, to industrial environments. Because it really helps humans in making work easier. The need for automated tools to facilitate human activities, makes the need for smart chips or microcontrollers increasing. A new breakthrough in the world of microcontrollers with the application of Arduino.Especially at SMPN 10 Salatiga, there are fish ponds and garden lights, which you forget to feed or not, while the officers forget to turn off the lights, causing the fish to die and the lights stay on even though it is noon. This study tries to implement Fish Feed Control and  automatic garden lights on and off using Arduino and scheduling, this is so that the fish stay healthy   and the garden lights can turn on or off according to the schedule desired by management. The author designed a garden lamp and automatic fish feed based on a case study at the school. The tool is designed with three sources of tool control. The first manual is pressing the fish feed manual button, the light switch and the reset button. Both semi-automatic, as a fish feeder, light ON/OFF and reset remote control with the Android application. The third auto is scheduled feeds and lights. This tool is designed to manage fish feed and garden area lighting. This tool is practical to use, inexpensive, useful, flexible and easy to build. The classification of this tool is sufficient for the needs of the school garden. Among the advantages of this tool is that it can be controlled remotely effectively 25 m without a hitch using the android application. The author hopes, this tool provides benefits and solves problems in schools.

Measurement results of load cell sensors sometimes has a significant difference even have the same weight, this is usually caused by several factors that affect the difference in the measured value, therefore on In this research, an analysis of the measurement results of a load will be carried out with the measuring object, namely rice, package and fruit. This analysis is carried out to determine the load which object is more efficient and accurate in do some weight calculation. The process of measuring weight using a load cell sensor is carried out based on Arduino device. After the measurement results are obtained then they are analyzed and compared between the measurement results of rice, package and fruit to determine the level of efficiency of the load cell sensor. Based on the experimental results of fruit, the measurement between the results to the real value is 4%. The measurement results of fruit have the efficiency of the load cell sensor

Paguyuban bonsai ornamental plant is a premium ornamental plant, it becomes interesting if its marketing adopts information technology while aligning the goals of its members. The modern web concept is dynamic and responsive used to support the marketing activities of ornamental plant farmers through object oriented based design. This web design uses the Waterfall method using five main stages and fifteen subwork items. All sub items of work are estimated based on a triple time estimate that has a variable start time, actual time, and late time. Estimation of bonsai dynamic web marketing projects takes 115 days of 95%, the potential of the project to finish 111 days earlier by 2,5%, and the potential of the project to be 118 days late by 2,5%. Modelling using Waterfall produces a standart error of 0,0509 smaller than the standart deviation of 1,9, so it can be said that this model is very good and representative to be carried out according to the specified time. Bonsai ornamental plant marketing websites have use responsive concepts using PHP MVC Framework and dynamic concepts using bootstrap.