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.
This code practice oscillator was found in an English publication from the 80's. The circuit can...
This circuit that also has a Power On reset was obtained from a 2005 Linear Technology manual. The...
This circuit is based entirely on TTL gates. The circuit must be powered by a voltage of 5...