Found elsewhere in this section, this circuit mimics the noise of a steam locomotive. This was obtained from an Electronics Today International of the 1980s.
This circuit was found in Radio Electronics magazine from October 1966. It consists of a rhythmic...
This circuit is from a Popular Electronics from the 90's. The circuit provides an output for a...
The transformer of this unit found in an old Japanese documentation can have 22 to 25 V of...