5.11 Summary

This chapter has described the basic principles of LED displays and showed how they can be used in microcontroller based projects.

The use of 7-segment LED displays has been described in detail, including the multiplexed multi-digit displays. The 7-segment encoding table is given that will enable the user to display any number by simply sending the correct code to the port where the display is connected to. The operation of dot-matrix LED displays have been explained briefly.

The chapter has also described the widely used LED alphanumeric displays, used to display numbers 0 to 9, letters A to Z, and some common symbols. The encoding table of alphanumeric displays is given to enable the user to display any required number or letter by reading from the table and sending the correct code to the display port.