In general, the current safes lack a security system and are impractical in accessing them. Looking at the current conditions, most of them still use number combination security, such as the safe security system at Sandimedia, seeing the current situation, the owner of Sandimedia can open the safe, while employees often told to take the files that are in the safe and are often wrong in determining the combination of safe numbers. For the author, this method is less effective for emergency matters. The importance of making a safe opening system using RFID which aims to facilitate user access rights that do not need to rely on number combinations.This data collection method is carried out through several methods aimed at producing certain products and testing the effectiveness of these products. This method is applied to the research procedure into 5 stages (1) literature study, (2) problem analysis, (3) design and realization, (4) testing and measurement (5) discussion methodThe results of the implementation of a security system in safes using a microcontroller-based RFID, the authors can conclude that after system design and testing, it can be seen that RFID technology can be applied to safes as a security system and the use of Radio Frequency Identification (RFID) as a safe safe system runs in accordance with designs and programs that have been made

This research, in general, aims to improve the learning outcomes of class X MIPA 4 students of MAN 1 Grobogan in the 2018/2019 academic year by implementing multimedia learning. And specifically it aims to make students able to achieve the learning objectives by producing a minimum KKM score of 70 and at least 80% of the total students are able to reach this minimum limit. The research method used in this research is the Classroom Action Research Method or better known as the Classroom Action Research (PTK) method. The PTK method is a process of assessing learning problems in the classroom through self-reflection in an effort to solve these problems by taking planned actions in real situations and analyzing any effects of these treatments. The results of research conducted on class X MIPA 4 MAN 1 Grobogan, the application of multimedia presentation learning media on the basic laws of chemistry and stoichiometry with the concept of enjoyful learning can improve student learning outcomes. That the application of multimedia presentation learning media can improve student learning outcomes in chemistry, especially in the material of the basic laws of chemistry and stoichiometry

The purpose of this research is to produce tangible results in providing comfort or convenience in turning on or off the night life at home everyday, especially for people who forget to turn off the lights. The method used in making microcontroller-based home lighting control using an android smartphone is. This research method consists of several stages, analysis methods, design methods, implementation testing methods, and maintenance. The results achieved are improving the aspects of comfort and convenience for agencies, where this series of tools works after bluetooth devices are available on android smartphones. connected to a bluetooth module which is connected to the Arduino microcontroller. Basically, the principle of using this tool is that users must be able to operate a smartphone based on the Android operating system. The conclusion of this research is that the Arduino-based light control device using bluetooth can fulfill its function to control the lights properly and the device is designed to be minimalist and safety so it is safe to use.