Calculator

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Calculator

• Sahini

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What is a Calculator and Types?

• Calculator is a device that is used for
  performing mathematical calculations.
• Calculators can be hardware or software,
  mechanical or electronic, and are often built
  into devices such as PDAs or mobile phones.
• Modern electronic calculators are generally small
  and digital.
• Calculators are usually operated by Lithium
  batteries or Solar cell.

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Parts of a Calculator

• There are a few parts that we can't see unless
  we
• take the calculator apart.
• The keyboard membrane and keyboard sensors are
• programmed to know which key you are pressing
• and in what order.
• They are also programmed to know what to do
• when you give it a command such as add or
• subtract. You can see the front of the
  display case.

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What is LCD and how does it work?

• LCD stands for Liquid Crystal Display. It can
  provide a much better, brighter image.
• There is a set of two transparent panels with a
  liquid crystal solution between them. Light is
  shined from behind the panels. Each crystal
  either allows light to pass through or blocks the
  light. The configuration of the crystals forms
  the image.
• A display, usually made from LED lights or liquid
  crystal (LCD).

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Measurements of the my calculator

• The height is 10 cm
• The width is 6 cm
• And the perimeter is 32 cm

Keys color of the my calculator

• 2/26 are pink (OFF, ON/C).
• 4/26 are blue (MC, M-, M, MR).
• 12/26 are olive green (1,2,3,4,5,6,7,8,9,0,.,/-).
  
• 8/26 are grey ( , , -, , , , , )

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What Do the Ms mean?

• M- means clear the memory.
• M Memory Add takes the number on the display,
  adds it to the memory, and puts the result into
  memory
• MC Memory Clear sets the memory to 0.
• MR Memory Recall uses the number in memory,
  acts as if you had keyed in that number yourself.

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Types of Calculators
A basic calculator
solar power calculator.
Electronic Calculator in 1970s
An old mechanical calculator.