This circuit was found in a Signetics documentation from the 1980s. Next to the figure are the waveforms of the generated signals. The transistor admits equivalent.
This antenna for the frequencies 146 or 440 MHz was found in a magazine 73 for Amateur Radio of...
This circuit, when connected to the 110 V power grid makes it possible to test capacitors with...
This two-input limit detector was found in an American 1980s documentation. The circuit can be...