To introduce young people at school at early stage to engineering profession, an activity such as giving a lecture and some demo to them becomes important. This activity will hopefully create better understanding on engineering world especially in the field of electrical engineering by introducing an increasingly popular technology called IoT (Internet of Things). The target school is SMK Muhammadiyah 02 Tangerang Selatan. Because of COVID-19 pandemic situation and PSBB rules implemented in Tangerang Selatan in which school students had to study from home, then the lecture was given online by Zoom application on Tuesday, August 18th at 13.30 – 15.00 WIB. The partcipants attending the online lecture reached 26 consisting of grade III students of Computer Network program and some teachers as well. The results of the questionnaires given shortly before the webinar ends show that for Introduction of Engineering Profession, the majority of them (61,54%) states Interesting Enough, for Introduction of IoT the majority (57,69%) says Interesting and for IoT Demo the majority (53,85%) thinks Interesting Enough. The benefit of this webinar is clear when the majority of participants (57,69%) agrees Beneficial to them and all of them (100%) say Agree that this activity is also introduced to other students at school

Mukherjee and friends had written that the fermentation process of tempeh can increase the nutritional value, organoleptic properties, and digestibility of the product, as well as increase the bioavailability of proteins, carbohydrates, and lipids, in easily digestible sizes. Therefore, fermentation process needs more attention to produce best quality tempeh. In order to automate the industry process on making tempeh, the incubator for fermentation is designed to meet market needs so that it can be implemented by tempeh industry. The time required for the conventional tempeh fermentation process ranges from 24 hours to 40 hours and can be exacerbated by the transition season (uncertain temperature). The study aims to reduce human dependence on controlling temperature and humidity as well as shorten the time in the fermentation process and reduce failures in making tempeh by designing a tempeh incubator and applying the concept of the internet of things (IoT) using MCU32 Node and firebase as a real time database. To apply the IoT-based tempeh incubator, there are several discussions in this paper, namely control systems, temperature sensors, humidity sensors, android, Arduino Mega 2560 and IoT architecture. temperature and humidity sensors as leading devices that are in direct contact with real conditions using a DHT22 sensor which has 2 functions at once to read temperature and humidity then sent to Arduino Mega 2560 with C++ language as reference data to turn on/off (6 Fan 12 V Dc and 2 Spiral Heaters). This control process is configured fully automatically by the system. After going through the testing stages that the temperature and humidity control will work when the room temperature is below 31°C and above 33°C. From the results of testing the tempeh incubator, the average temperature is 31°C and humidity is 84.33% and the time required for tempeh fermentation is 20 hours, which is 4 hours faster than conventional process.

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The need for electricity has increased every year. One of the most popular supply of electrical energy is electrical energy from energy sources flowing and plunging water, called as the Micro Hydro Power Plant (PLTMH). Cisadane River is one of the major rivers with length around 80 kilometers and crosses 44 districts in 5 regencies / cities, including desa Kranggan, South Tangerang. Therefore, community service is carried out in an effort to utilize and optimize the flow of the Cisadane river. The Study of PLTMH design for community service program was conducted. Data of river flow, altitude and location of the river flow will be collected so that it can be calculated and observed for the design of PLTMH that best suits the efficiency of the largest electrical energy, which is obtained using the TurbinPro software program. PLTMH planning chose to use a propeller/kaplan turbine because of its low head which is 4 meters. The power generated is 994 kW at a maximum head with an efficiency of 91.2% and a river flow of 52.26 m3/s and at a minimum head of 601 kW with an efficiency of 82.2% and a discharge of 47.56 m3/s. Keywords: electrical energy, community service program, PLTMH, power generation, Kaplan turbine