This circuit serves as a reference for the components used and the time. The circuit is from 1967 RCA documentation. MOSFETs from that time are used.
This Sample & Hold circuit configuration is from an American 1980s documentation. The circuit uses...
By LED flashes you can get an idea of the degree of moisture in the soil. The sensors are wires...
Found in an old Popular Electronics, the purpose of this circuit is to give a strong discharge in an...