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 Texas Instruments integrated circuit, available from Mouser Electronics, has a 91 dB common...
This circuit was obtained from a 1977 magazine, but can still be mounted using BC548 for TR1 and...
This oscillator or clock generator generates rectangular signals and frequencies up to 100 kHz....