The circuit shown was found in Intersil documentation from the 90s. The formula allows to calculate the voltage obtained as a function of the values of the resistors.
This circuit with JFET was obtained in a book on FETs of 1989. The circuit is still current since...
This is one of many possible circuits for the LM3914 IC as an audio indicator. The trim pot has...
This old slide projector control circuit was found in an 80s Hands On. The circuit uses modern...