This electronic Morse key was found in a Popular Electronics from the 90's. The components are common, but there is a mechanical part that requires assembly skills.
This circuit was found in an old American documentation. It can operate with signals from 40 Hz to...
The circuit shown in the figure makes it possible to trigger a load after times that can extend up to 4...
This circuit has as a critical component the transformer that has low voltage windings for the...