System for precise regulation and control of water and fertiliser for crops in accordance with parameters of conductivity, acidity, received radiation and accumulated evaporation

摘要

The system comprises a central unit with microprocessor and RAM and EPROM memories, with external connection circuits and other complementary circuits, being interconnected with two blocks of inputs, one of them being analogue inputs for the sensors and the other of digital type optocoupled to the elements of the installation and to a circuit for control output cards of general type, filters and valves, and also two blocks for output, one of them for injection pulses and another for proportional voltage outputs for adjustable injection connection elements. IMAGE