This circuit was found in a 1964 Electronic Design. The circuit makes use of transistors of the time. Current equivalent transistors may be experienced.
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...