This circuit was found in a Popular Electronics from the 90s. The circuit uses common components today. The waveform of the generated signal is shown next to the diagram.
This old two-stage video amplifier uses integrated circuits that are not easily obtainable today. The...
This circuit, found in a 1994 publication, allows the use of two common analog telephone sets on a...
This circuit was obtained in a Popular Electronics of the 90s. The circuit uses integrated from...