Authors: LARA GRLIĆ, GABRIEL KRŠIĆ i EMA STANKOSKI HRGOVIĆ
Mentors: SANJA PAVLOVIĆ ŠIJANOVIĆ i DAVOR ŠIJANOVIĆ
School: GIMNAZIJA VUKOVAR
Hydropower is one of the most frequently used renewable energy sources. Probably the oldest energy source used by man, the first recorded use of which was in Greece 6000 years ago, and was reflected in irrigation systems. The first hydroelectric power plant in Croatia, HE Jaruga on the Krka River near Šibenik, was put into operation in 1895, just two days after the first hydroelectric power plant at Niagara Falls.
By presenting the water mill, we want to point out the importance of water as well as the privilege of living along the Danube River, which has a special significance for the life of the local community. Although the power of water has been known since ancient times, it has not been used enough. Today, it is possible to build mills along the banks of the river, which do not necessarily have to be hydroelectric plants, but can be sufficient for households or smaller plants. Our water mill contains a mini generator powered by water power. By turning the rotor in the generator, a magnetic field is created, kinetic energy is created, which comes out through the wire in the form of alternating current. We convert the alternating current into direct current and obtain a constant 5V on the output units for further use of the device on the model or, for example, for charging mobile devices.
We manage our mill using the DASDUINO microcontroller and the BLYNK IoT mobile application. The operation of the entire system is based on a water pump that is connected to the solar system via a relay and that continuously produces 12 V, which is fully sufficient for its operation, while the DASDUINO has a separate power supply system of 3.3 V. The DASDUINO is a microcontroller that has a built-in ESP 32. module for wireless connection to the WI-FI network. By connecting to the Internet and connecting to the BLYNK IoT application, we manage the operation of the mill.
Our authentic wind farm uses wind energy, which it converts into alternating current using a generator. The energy, passing through electronic circuits, converts alternating AC into direct DC current and maintains a constant voltage of 5V on the USB output unit. It is used to start other devices on the mockup.