This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
We found this circuit in a publication of 1990. With the changes it can be mounted easily today....
This circuit was found in an American publication in 1966. The circuit uses a general-purpose FET that...
September 2016 - Mouser Electgronics already has in stock the new moisture digital sensor HDC1010...