Indonesia is a tropical country, because its area that crosses the equator has enormous solar potential, with a radiation magnitude of 4.80 kWh / m2 / day / day or equivalent to 112,000 GWp. Meanwhile, the solar energy received by the earth is 1.74 x 1017 W / hour, of which about 1-2% is converted into wind energy. However, in terms of total energy potential, Indonesia only uses around 10 MWp of solar energy, the difference is that wind energy which is planned to reach 250 MW in 2025 only uses 1 MW of the total potential. Skyscrapers are places with enormous wind energy potential. Because if the height exceeds 150 m, the reference point of the building can be called a skyscraper, which will cause high wind speed at the top of the building. This phenomenon is caused by the influence of the friction force which suppresses the wind speed, therefore the higher the position, the higher the wind speed. With this potential, to provide additional power and help save energy in existing facilities in the building, a smart photovoltaic and vertical turbine prototype design was created. The prototype design is a combination of weathered turbines and solar panels, the reason for using this type of turbine is because it can rotate at low wind speed (low wind speed) and has a very simple structure. In addition, because it uses a vertical shaft, the generator and gearbox can be placed close to the ground, making maintenance easier. The working principle of this prototype is designed to use a turbine to convert wind energy on the roof of the building into electrical energy, then mix it with electrical energy converted from solar energy by solar panels, so that electrical energy will be more optimal.

In 2019 Indonesia is able to support its nation and does not need rice imports from abroad. This situation is called rice self-sufficiency. Then in order to maintain rice self-sufficiency from year to year, it is necessary to apply technology to increase the quality of rice production. Therefore, a Hydroganic Monitoring System Design was created which is used to monitor plant watering automatically using the YL-69 soil moisture sensor controlled by Arduino Uno and instructed to the LCD to display the soil moisture value according to soil pH in real time. The watering system that has been created can automatically drain water to the plants. The water that is flowed automatically by this system comes from the fish pond that is right below it, where the water from fish excrement will produce organic nutrients for rice plants. With this research, rice production will grow more effectively to improve rice quality. With this research, it is expected that Indonesian rice production will increase effectively and in line with the improvement of rice quality. From the research that has been conducted, it is found that from the experimental data above, it can be calculated that the average water discharge in one irrigation is 2.37 m/s.

People want energy to satisfy their each day needs. However, maximum of those energy customers are now no longer aware that using an electric powered load is too large, which regularly reasons disturbances. In coping with overload disturbances withinside the family sector, MCB is used as a protection tool. The running precept of the MCB continues to be the usage of magnetic, so it's far less effective. When disconnecting the cutting-edge because of overload, the MCB will experience a touch overdue, which could reason sparks and a hearthplace withinside the family. Therefore, on this look at a cutting-edge sensor protection circuit is designed to update the MCB. This circuit can show the cutting-edge cost at the LCD and restriction the overcurrent to a restriction of three amperes. The overload safety machine constructed from the ACS712ELC-5A cutting-edge sensor can come across currents among 0A and 5A. So, to reduce off the cutting-edge, a 12V relay is used. When trying out a ready-made machine, this protection tool can study currents withinside the variety 0A to 3A, with median studying mistakes of 0.65%. If the burden is better than 3A, the machine also can reduce the cutting-edge.

Indonesia, which is a tropical country, has a very large potential for solar energy because of its area that stretches across the equator, with a radiation magnitude of 4.80 kWh / m2 / day or equivalent to 112,000 GWp. On the other hand, the earth receives solar power of 1.74 x 1017 W / hour and about 1-2% of it is converted into wind energy. However, from the total energy potential, Indonesia has only utilized around 10 MWp for solar energy and not much different, wind energy, whose utilization is planned to reach 250 MW in 2025, has only been utilized around 1 MW of the total existing potential. With this potential, to be able to supply additional power and help save energy for existing facilities in the building, a Prototype of Solar Panel Hybird and Vertical Axis Wind Turbine was created. The design of this prototype is a combination of savonious type turbines and solar panels, where the use of this type of turbine is because it can rotate at low wind speeds (low wind velocity) and its construction is very simple.

At this time the rocket launcher is still controlled by humans who utilize technology using a PC and a servo motor as a control device to determine the accuracy at the shooting angle, in designing this robot complete components are needed so that the robot can work automatically according to the input given, the rocket launcher robot controlled automatically by communication from the PC after which the command is forwarded to the microcontroller using a USB TTL cable and sent to the Xbee-pro sender circuit then transmitted and received by the Xbee-pro receiver then transmitted to the microcontroller and processed to the control system on the launcher a rocket in the form of a servo motor and a relay as a component in the firing of the rocket launcher. Based on the test results, the robot has been able to direct the rocket launcher at a predetermined angle and has been able to carry out firing actions on each rocket starting from manual rockets, double rockets, triple rockets and full rockets with a success rate of up to 80%.