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 is indicated for small low power amplifiers allowing the use of a tweeter. The...
This circuit generates signals controlled by crystal and can generate marks up to 30 MHz of 1 in 1...
The circuit shown was obtained from a 1976s publication for radio amateurs. Its purpose is to...