This circuit is from an American publication of the 80's. It makes use of components of the time. However, the circuit is the basis for a modern shield application since the input is TTL.
We found this circuit in the National Semiconductor FETDatabook of 1977. The signal has an...
This circuit was obtained from an English magazine from 1979, but it can be easily assembled today...
September 2016 - Mouser Electgronics already has in stock the new moisture digital sensor HDC1010...