Вимірювач вологості

Abstract

The proposed moisture meter contains a moisture-sensitive capacitor, a bipolar transistor, a field-effect transistor, an inductance coil, a circuit capacitor, a resistor, and two direct current power sources. The first output terminal of the first power source is connected to the first lead of the resistor. The second lead of the resistor is connected to the base of the bipolar transistor. The emitter of the bipolar transistor is connected to the source and base of the field-effect transistor. The collector of the bipolar transistor is connected to the gate of the field-effect transistor, the first lead of the moisture-sensitive capacitor, and the first lead of the inductance coil that is also connected to the first output terminal of the moisture meter. The second lead of the inductance coil is connected to the first lead of the circuit capacitor and to the first output terminal of the second power source. The second output terminal of the second power source is connected to the second lead of the moisture-sensitive capacitor, the second lead of the circuit capacitor, the drain of the field-effect transistor, the second output terminal of the first power source, and the output terminal of the moisture meter.