Bcd to 7

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A BCD to 7 segment decoder converts binary coded decimal (BCD) numerals into the signals needed to illuminate the correct LED segments to display the numeral on a 7 segment display. The 7 segment display consists of 7 LED segments arranged in a pattern to display the 10 decimal digits. A truth table shows which segments must be turned on to display each numeral, allowing the decoder to convert BCD codes into the correct segment activation pattern.

Science

BCD TO 7 SEGMENT
DECODER
• A digital display consist of seven (7) LED (Light
Emitting Diode) segments is commonly used to
display decimal numerals in digital systems.
• Most familiar examples are electronic calculators and
watches where one 7-segment display device is used
for displaying one numeral 10 through 9.
• For using this display device, the data has to be
converted from some binary code to the coded
required for the display.
• Usually, the binary code used is natural BCD.

FIG (1)
FIG (2)
DIAGRAMS
• Figure (1) shows the display
device.
• Figure (2) shows the segment
which must be illuminated for
each of the numerals.

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