This circuit was found in a 1965 US documentation. The circuit converts a DC signal to a 400 Hz AC signal. Transformer data was not provided.
This circuit uses unusual operational amplifiers, but equivalents can be tried. FETs can also be...
This circuit was obtained in a 1991 publication. What it does is to amplify a signal with unit...
This small digital transmitter uses a 1 MHz crystal, or another nearby frequency, to produce a...