Indonesia is a country with a tropical climate that has two seasons, namely the dry season and the rainy season. In the dry season, sun drying is the most widely used method for agricultural products. In the rainy season, people who open businesses in the food processing sector have difficulty predicting uncertain weather. The community needs solar thermal energy to dry food ingredients in the form of opak, tubers, fruits, etc. In the rainy season, the value of production has decreased. This study aims to create a drying machine that can help people to dry various types of food and fruit products. The research was carried out in several stages, namely field observation, literature study, design, manufacturing, and performance testing. The study states that: (1) the manufacturing process of electrical machine dryer was done in three stages: the initial stage, advanced stage, and the final stage. (2) the trial of an electrical dryer machine was used to dry opak and banana. Data obtained in the form of opak before drying weighs 3.4 ounces and after drying to 2.2 ounces. Whereas the banana before drying weighs 7.3 ounces and after drying to 4.5 ounces; (3) electrical dryer machine is very helpful in the process of drying food processed products in Subang Regency. Keywords: manufacturing, electrical dryer machine, opak and banana.

Sorosutan is one of the villages in the Umbulharjo District with the largest population of 14,979 people based on statistical data in 2017. During the Covid-19 pandemic, the implementation of health protocols such as providing a handwashing area and mandatory wearing of masks is applied in all places, including public service places such as the Sorosutan Village Office. Socialization continues to be carried out by various parties so that residents can increase their self-discipline in every place and time, including when visiting these public places. The presence of officers or guards at each entrance is significant to remind residents who will enter. A large number of visitors will cause problems because it can cause long queues. In addition, the limited number of employees or personnel becomes a separate obstacle when it comes to preparing special personnel for controlling visitors. The smart sink is a solution in helping officers at the Sorosutan Village office remind residents to always wash their hands and wear masks when visiting the office. The temperature sensor installed in the sink can also help speed up temperature checking, which previously had to be done manually by officers. With the provision of this tool, it is hoped to increase public awareness so that the spread of Covid-19 can be reduced.

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This study aims to design and test an automatic fish feeder (AFF) controlled by a microcontroller with an electricity supply from a solar cell. To build a reliable and accurate system, input data is collected for design, followed by system development, feasibility analysis, and performance testing. The test results show that AFF works according to the settings of the microcontroller, where the servo motor can open and close the feed channel periodically, three times a day. The feeding schedule is set at 07.00, 12.00, and 16.00.  In addition, fundamental indicators including feed conversion ratio (FCR) and feed efficiency (FE) are showing positive results. Through the application of AFF which replaces manual feeding, the FCR is obtained at 1.15 from the initial value of 1.44. Meanwhile, FE increased from 69.4% to 86.8%. Technically, AFF is suitable for use by tilapia and carp farmers.