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 is from a 1977 publication for radio amateurs presenting a crowbar protection. The...
Found in a 1965 Motorola documentation, this circuit uses a neon lamp as a trigger element. The SCR...
Twin-T oscillators can be used to produce sinusoidal signals in the audio track with good...