Making a 12 bit DAC Using an Arduino - The Learning Circuit

Once analog signals have been processed by electronics and converted to digital, to convert them back to analog, a DAC is needed. In this video, Karen shows how to make an R-2R Ladder DAC using just resistors, all of the same value. The ladder uses 12 of the digital I/O on an Arduino Uno as its inputs. While the Ladder DAC will be 12-bit, Karen is able to use it to show the differences in resolution between a 4-bit, 6-bit, 8-bit, and 12-bit DAC, generating a sine wave as a visual demonstration: Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: Visit the element14 Community for more great activities and free hardware: Tech spotlights: Roadtest and Reviews: Project14: