The differential amplifier board for the Analog Computer Confetti. A good description of the basic functionality of the differential amplifier one can find here: The Differential Amplifier.
The screenshot of an oscilloscope: the difference of two inputs, a sine wave minus a square wave.
The Confetti702 Differential Amplifier was designed by Wolfgang Spahn 2015-19.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.