This simple bridge circuit can be used for impedance or resistance measurement using a high impedance earphone as an indicator. The circuit is from an American 80's documentation.
In a voltage follower, the gain is unitary, and the input impedance is very high. The output...
This circuit, from an old 1988 publication, generates bars on the screen of an old analog TV for...
This circuit is from a Motorola integrated circuit manual. The integrated used is no longer common...