This simple Morse Code oscillator was found in a 1980s American documentation. The power supply should be powered with 5V and the integrated can be the 7400.
This TTL circuit was found in a 1978 technical documentation. The power must be supplied with 5 V....
This circuit, suitable for tube equipment, was found in an old documentation. It uses a high...
The BA1404 integrated circuit (not very easy to obtain) consists of a complete stereo FM...