Suggested by a 90s Radio Elecrtronics, this circuit is intended to supply mobile equipment of the time. The transformer data is given next to the diagram.
This simple alarm was found in a 1982 documentation, but uses components that are still common,...
In the figure we have the receiver of a sequential remote control operating at a frequency in the range of...
Although not using transformers, this amplifier may have difficulty mounting if the original...