Biquinary Code Converter
Convert decimal digits to biquinary code: 2 binary bits + 5 quinary bits
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Biquinary Code Table
0=0010000 1=0001000 2=0000100 3=0000010 4=0000001
5=0110000 6=0101000 7=0100100 8=0100010 9=0100001
[binary][quinary]: 00=0-4, 01=5-9
Biquinary: 2 binary bits + 5 quinary bits: 00=0-4, 01=5-9. Exactly one 1 in each 2-bit and 5-bit parts.
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Only single digit 0-9. First 2 bits, next 5 bits. Exactly one 1 in each part.
What Is Biquinary Code?
Biquinary code is a mixed radix (2,5) 7-bit code: first 2 binary bits + 5 quinary bits, exactly one 1 in each part, like an abacus.
Error Checking
Exactly one 1 in each 2+5 parts, easy parity check.
Human Readable
Directly maps to abacus beads, easy to visualize.
Early Computers
Used in early computers like UNIVAC.
Abacus
Inspired by Chinese abacus with 2 heaven 5 earth beads.
💡 Teaching Example: Convert 7 to biquinary. Step 1: 7=5+2. Step 2: binary=01 (≥5), quinary=00100. Step 3: biquinary=0100100.
Applications
Early Computers
Abacus
Error Checking
Frequently Asked Questions
What is biquinary code?▼
Biquinary code is a 7-bit code: 2 binary bits (00/01/10) + 5 quinary bits. 2×5=10 states for 0-9.
How is biquinary structured?▼
First 2 bits (00=0-4, 01=5-9, 10=special). 00+quinary.
What is biquinary for 7?▼
7=5+2: binary=01, quinary=00100, biquinary=0100100.
Why use biquinary?▼
Easy error checking, human-readable, used in abacus and early computers.
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