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1. Binary-Coded Decimal (BCD)
• A Presentation on BCD Number System
• Presented by: [Your Name]
• College Name: [Your College Name]

2. Introduction to BCD
• • BCD stands for Binary-Coded Decimal
• • Each digit of a decimal number is
represented by its binary equivalent
• • Commonly used in digital systems like
calculators, clocks, etc.

3. What is BCD?
• • BCD is a binary representation of decimal
digits
• • Each digit is encoded separately using 4 bits
• • Example:
• 0 = 0000
• 1 = 0001
• 9 = 1001

4. BCD vs Binary
• Decimal | Binary | BCD
• --------|--------|-----------
• 8 | 1000 | 1000
• 12 | 1100 | 0001 0010
• • Binary: whole number converted at once
• • BCD: each digit is separately encoded

5. Types of BCD
• • 8421 BCD (Natural BCD)
• • Excess-3 Code
• • Packed BCD
• • Unpacked BCD

6. BCD Conversion Example
• Convert 89 to BCD:
• • Decimal: 89
• • BCD:
• 8 → 1000
• 9 → 1001
• • Result: 1000 1001

7. Advantages of BCD
• • Easy to convert to and from decimal
• • Reduces human error in digital readouts
• • Compatible with display hardware

8. Disadvantages of BCD
• • Less efficient (more bits needed)
• • Arithmetic operations are more complex
• • Not suitable for high-performance
computing

9. Applications of BCD
• • Digital clocks
• • Calculators
• • Digital meters
• • Embedded systems

10. Summary
• • BCD represents each decimal digit in binary
form
• • Common in electronics where human-
readable output is needed
• • Various types like 8421 BCD and Excess-3