5x7 Dot Matrix Display LED (Common Cathode)
Standard red 5 x 7 dot matrix for use with embedded projects. Use these in series to display alphanumeric characters. You can use the Max 7219 IC for driving these displays with only 3 data pins from the microcontroller. This is of Common Cathode type.
The Common Cathode (CC) – In the common cathode display, all the cathode connections of the LED segments are joined together to logic “0” or ground. The individual segments are illuminated by application of a “HIGH”, or logic “1” signal via a current limiting resistor to forward bias the individual Anode terminals (a-g).