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THE PARALLEL BINARY ADDER

THE PARALLEL BINARY ADDER. BY: MATHEW AU & AKSHAY AHOOJA. The History Of The Calculator. Ancient Times - The abacus is the main aid to calculation. 1600 - " Napier's bones " invented by John Napier for multiplication, based on the ancient numerical scheme known as the Arabian lattice.

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THE PARALLEL BINARY ADDER

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  1. THE PARALLEL BINARY ADDER BY: MATHEW AU & AKSHAY AHOOJA

  2. The History Of The Calculator Ancient Times - The abacus is the main aid to calculation. 1600 - "Napier's bones" invented by John Napier for multiplication, based on the ancient numerical scheme known as the Arabian lattice. 1623 - Willhelm Schickard invented the "Calculating Clock", the first mechanical calculator. It used a version of Napier's bones for multiplication with a mechanical adding/subtracting calculator based on gears, with mutilated gears for carry. 1642 - Blaise Pascal started to develop a mechanical calculator - the Pascaline. Capable of addition, subtraction was performed by nines-complement addition, and multiplication was performed by repeated additions and subtractions. It had shortcomings and failed to sell. 1853 - The Scheutz Difference Engine completed: the world's first printing calculator. 1878 - The first direct multiplication machine was built by Raymond Verea

  3. History (Continued) 1900 - 1960- Mechanical calculators developed slowly - electric motor drive, reduction in size, added features (eg. automatic multiplication & division). 1948 - Curta miniature hand-held mechanical calculator introduced 1960 - First electronic desktop calculator - Bell Punch/SumlockAnita Mk VII - based on cold-cathode vacuum tubes 1970 - First hand-held calculators 1972 - First scientific pocket calculator introduced 1977 - Solar powered calculators introduced.

  4. HOW IT WORKS? 510 +410 910 IN BINARY… 1012 +1002 10012 4 2 1

  5. HOW IT WORKS (Continued) 1 1 0 0 1 0 FA FA HA 0 0 1 0 0 1 HA – Half Adder FA- Full Adder Carry ANSWER = 1 0 0 12 910

  6. CIRCUIT DIAGRAM HA -Red FA1- Green FA2 -Blue

  7. THE BREADBOARD HA -Red FA1- Green FA2 -Blue

  8. AKSHAY AHOOJA MATT AU THE END

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