This simple audio generator with the 741 was found in a 90sTexas Instruments. The circuit generates sinusoidal signals from 15 Hz to 150 kHz in 4 bands, as shown in the diagram.
The figure shows how to use an 8080 in a digital to analog converter. The circuit is from a Radio...
We found this circuit with PUT in an American publication from the 1980s. PUT is not a common...
This circuit was found in a 1968 documentation. It makes use of both NO and NC reed-switches and small...