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Published on Mar 28, 2013
This video gives the basics of R-2R resistor networks and their use for digital to analog conversion (DAC). It discusses why these networks have a constant output impedance of R, and how the digital inputs contribute to the composite analog output in a binary scaled manner. The network is analyzed easily when broken down into segments using both Thevenin equivalent circuits and Superposition. Practical examples are shown with a homemade R-2R network, an Arduino Uno, a mixed signal oscilloscope and a fun XY application. A copy of the drawings in this video can be found here: http://www.qsl.net/w/w2aew//youtube/B...