This electronic Morse Key for telegraph message transmission was found in an American 1980s amateur radio documentation. The circuit uses TTL technology and must be powered by a 5V voltage.
The crystal in this circuit is 32.758 kHz used in TV. The circuit was obtained in an English...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This very low current circuit was found in the April 1995 issue of Electronics Now magazine. The...