This circuit was found in a 1964 Electronic Design. The components are from the era and the load is 60 W.
Found in a 1970 documentation this circuit makes use of components still common in the market. The...
This circuit is from a manual of FETs of 1977. The FET can be the BF245 or MPF102 and the relay is of...
In the figure a circuit that is the basic application of NE567 for the detection of a tone applied to...