BCD to seven segment
BCD numbers are made up of using four data bits similarly to hexadecimal numbers but BCD numbers only range from 0 to 9. It is the most frequently used digital display in calculators, digital counters, digital clocks, measuring instruments, etc. Usually, the displays like LED’s as well as LCD’s are used to display the characters as well as numerical numbers. But, a seven segment display is used to display both the numbers and characters.
It is of two type
Two types of seven segment LED display:
Common Cathode Type: In this type of display all cathodes of the seven LEDs are connected together to the ground or -Vcc (hence, common cathode) and LED displays digits when some ‘HIGH’ signal is supplied to the individual anodes.
Common Anode Type: In this type of display all the anodes of the seven LEDs are connected to battery or +Vcc and LED displays digits when some ‘LOW’ signal is supplied to the individual cathodes.
Truth Table
The truth table for it is given below:
K-Map For “a”
K-Map For “b”
K-Map For “c”
K-Map For “d”
K-Map For “e”
K-Map For “f”
Circuit Diagram
The figure below represents the circuit diagram for it:
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