SSD takes generally a 5 V DC power supply and has 7 digital pins named after the first 7 letters of the alphabet (A to G).In order to produce the required number or character, a specific combination of LED segments needs to be illuminated. The segments are lit on by applying an ‘LOW’ logic level to the cathode. The BCD or Binary Coded Decimal (BCD) decoder is a device that converts a digital format of a value into a format that displays devices such as the 7-segment display can interpret into a human-readable For instance, we need to use a BCD to 7-segment decoder in order to display a four-bit binary number from 0000 (0 in base 10) to 1001 (9 in base 10 ) on a 7-segment display In digital electronics, numbers are generally represented by their binary values.What is a BCD decoder and why do we need it to display a number?.As this device is made out of LEDs, it requires resistors order to limit the current supply.
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