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 circuit was obtained in the Philips integrated circuits manual of 1990. The indicated power is...
This TTL circuit generates a 100 MHz signal for digital instruments. The CI is not easy to obtain,...
We found this circuit in Ferranti's 1974 transistor manual. The components are from the period. The...