Utilization of the potential that exists in tourist attractions aims to increase the savings in expenses that must be borne by the community to manage tourism. The beach is a place that is rich and abundant in wind potential that can be used to drive wind turbines. To take advantage of the existing wind potential, of course, we must know how the wind potential is in the form of wind speed and locations that have wind speed potential and how to use it as energy to drive wind turbines. To obtain the potential of wind energy and utilize it, wind speed measurements are carried out using a digital anemometer and recorded for some time. The position of the measuring instrument installed must be protected from wind obstacles so that it is installed as high as 20 meters above the ground in an open position against the direction of the incoming wind. From the measurement results over a period of one day, the wind speed varies and changes at any time and the maximum value is 6 m/s during the day starting at 10:00 to 04:00. The wind speed profile obtained is analyzed and the type of turbine is determined according to the low wind speed below 10 m/s. From the analysis results, the appropriate turbine is the Savonius VAWT type and can produce electrical energy of approximately 2.43 Watts with a diameter of 0.11 m. The use of turbines for wind at low speeds will still have the potential to generate small-scale electrical energy for communities in coastal areas

Audio / Video Selector 5 Channel with Microcontroller AT89C2051 is a tool used to select one of the audio / video electronic equipment such as DVD player, VCD player, Playstation to be activated. This tool uses the AT89C2051 microcontroller which has been programmed as the control center of the 5 channel audio/video selector circuit by pressing the remote as the controller. The input of the device is connected to several electronic equipment and the output is connected to a television set. This tool makes it easy for owners of television sets that only have one A/V jack input.

The world's supply of fossil energy is currently decreasing, and in time it will be scarce, while the human need for energy continues to increase. Solar cells that utilize solar energy are a source of renewable electrical energy (EBT). The burden of electricity bills at the Fajrul Iman Patumbak Modern Islamic Boarding School, Deli Serdang Regency is quite a burden on Islamic boarding school expenses. To reduce the burden of spending on electricity bills at Islamic boarding schools, solar cells and control equipment are installed so that they can generate electricity. After this service is carried out, the cost of spending on Islamic boarding schools has decreased. From this decrease, other Islamic boarding schools who know about this program are excited to utilize solar cells as a source of electric power. In the end, this program became a pilot for Islamic boarding schools that used EBT. All of these hopes can be seen in the dedication video that has been broadcast on the YouTube channel.