To design a BCD to 7-segment decoder using logic gates, and to connect it to a 7-segment display to verify that the display shows the decimal digits 0 to 9 for the 4-bit BCD inputs 0000 to 1001.

A 7-segment display cannot understand binary or BCD codes directly. A BCD to 7-segment decoder is the combinational circuit that converts the 4-bit code into the seven signals (a, b, c, d, e, f, g) that switch the individual segments of the display ON or OFF.