Video explaining what multiplexing is, why we do it and how it is done. Covers using the Arduino to handle the multiplexing and using a 7219. Using the 7219 we can control up to 8 seven segment displays while using only 3 pins from the Arduino. The 7219 also handles all refreshing of the display and requires no additional drivers on the common signal of each seven segment display.
Wed 16 December 2015