Technology from Past to Present

by carolineliang
Last updated 4 years ago

Discipline:
Vocational & Technology
Subject:
Electronics
Grade:
9

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Technology from Past to Present

Technology from Past to Present

Calculators in the past

Present day calculators

Pascal’s Calculator or “ The Pascaline” was the first mechanical calculator created. It consisted of metal wheel dials that were turned to the appropriate numbers using a stylus, from that point, the answers appeared in boxes at the top of the calculator. Pascal’s Calculator, a polished brass box, was about 350mm by 125 mm by 75mm, compact enough to carry. On the top was a row of eight movable dials, with numerals from 0 to 9, which is use to add a column of up to eight figures. The machine was capable of adding, subtracting, dividing and multiplying.

Mechanical calculators were in use from the late-19th to the late-20th century. At this time, the first affordable pocket, electronic calculators started to appear. As you press the button of the calculator, you are compressing the rubber membrane underneath it.The rubber button pushes onto a layer of the keyboard’s sensor underneath the keyboard circuit. Finally, the processor chip activates to the corresponding chip you have pressed.

Ritty's earlier machines had two rows of keys placed across the front, each key marking a money denomination from five cents through one dollar. Pressing the keys turned a shaft that moved an internal counter. This kept track of total sales of the day. The total amount of each individual sale was displayed to the customer on a dial, closely similar to a clock face, with one hand for the cents and one for dollars.

How does the present day cash register work? Modern cash registers are manufactured with a drawer in which the money is kept and from which the operator can provide change to customers during transactions. Electronic cash registers require the operator to scan the barcode located on the item(s), which then displays the price and cost of these items, all of which are stored in a database connected to the register.

Present day cash registers

Cash registers in the past


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