This paper will discuss the results of research on the development of remote laboratory architectures for electronics telecommunications courses based on mobile devices. The background of study for the development of this system is to meet the demands of the world of education in the era of the industrial revolution 4.0 and the needs for online learning that is caused by the Covid-19 pandemic. Besides, with the development of cellular communication technology and mobile devices that have PC-level capabilities, mobile devices can support remote laboratory development. The design of remote laboratory system is based on an embedded system consisting of a user management server based on the Raspberry Pi 4 and an instrumentation system using Red Pitaya. Remote  Laboratory applications can be accessed using mobile devices such as Android based smart phones or tablets. The aim of the development of this remote          laboratory is to complete remote experiment activities in electronics telecommunications   courses in the Electrical Engineering study program.

The increasing demand for electrical energy and the decreasing supply of fossil fuels in recent years have increased the cost of electrical energy. So that the culture of saving electrical energy is a habit that must be cultivated in the community. On the other hand, energy-saving behavior cannot be realized massively without a support system that can control energy use. With these concerns, it is necessary to develop a method that encourages a culture of saving electrical energy. This paper proposes a system that supports active energy efficiency methods that can support an energy-efficient culture. This system is an electric power monitoring system that is integrated with a smart electrical panel that continuously monitors the use of electrical energy and can control electrical loads automatically, record electricity usage, provide comprehensive reports and analyze energy usage. The method used to carry out this research is research and development. This research has produced a prototype of electrical power control and monitoring system that has a smart panel based on a raspberry PI 3 and PZEM-004t power energy meter. The monitoring system performs and executes automatic control of electrical loads. The system can also provide reports in the form of data monitoring in daily, weekly, monthly or annual period. From the test results, it can be concluded that the system can work well. This research is expected to contribute to providing a system that can support government efforts in saving energy.

In this paper, the development of a cost-effective shooting simulator is presented. The proposed system employs the photodiode sensors for detecting the laser pointer. To reduce the cost, the photodiode sensors are arranged into rows and columns, and the scanning technique is adopted to detect the presence of the laser beam on the sensor arrays. A cheap microcontroller system AT89S52 is used to perform the task. The experiment results show that the developed shooting simulator achieves a high reliability in the laser pointer detection, especially for indoor application. Additionally, the developed application software running on a PC is very useful and effective tool to monitor the shooting process, and the shooting reports could be generated for analysing the shooter's performance.

Industrial worlds nowadays is encountering a change by entering industrial revolution 4.0 era. This era is also disrupting a lot of human’s activities, including science, technology and higher education. In facing industrial revolution 4.0 in education, Indonesian government has tried Cyber University program and the development of 4.0 learning, like distance learning system that is facilitated by SPADA (Indonesian online learning system). SPADA is a program of the Directorate General of Learning and Student Affairs of the Indonesian Ministry of Research, Technology and Higher Education to improve equitable access towards quality learning in higher education. Aggregator of the SPADA Indonesia is used to connect learning management system of higher education and the LMS of SPADA Indonesia. The problem in SPADA and LSM system is generally in a state of having shortcomings in the learning of engineering field, where to achieve learning outcomes, it needs facilities to do laboratory work activity. Using this background, the researchers in this research is integrating between LMS and remote laboratory system. It is expected that the solution of distance learning that integrated with remote laboratory can fulfill all resources needed to achieve learning outcomes education of the engineering field like in conventional learning.