Principle Behind Display Decoder Circuit: Even though commercial BCD to 7 segment decoders are available, designing a display decoder using logic gates may prove to be beneficial from economical as well as knowledge point of view. Here we design a simple display decoder circuit using logic gates. It generally has 4 input lines and 7 output lines. A display decoder is used to convert a BCD or a binary code into a 7 segment code used to operate a 7 segment LED display.
