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 from the 1993 Motorola Linear Interface ICs. Equivalent operating may be used and...
We found this circuit in an American documentation from 1969. The circuit works with the polarized...
This circuit is intended to increase the width of a pulse. The circuit is TTL and can be used as a...