Add to ORKGThis bachelor thesis is concerned with automatic irrigation systems. It describes their purpose their usual fabrication and their individual components, especially electronic controlling units. The goal of this thesis was to construct such unit. Thesis furthermore describes the process of design and realization of this device, starting from determination of the basic requirements on the device, through design of its circuitry and construction, up to design of included control program and final tuning of the device. Resulting controlling unit is functional. It can drive four branches of an irrigation system and measure relative humidity by four independent sensors. Unit offers a number of different functions and is controlled from remote use...