Calculator
Calculator Components If you've read the first page, you'll know by this point that portable calculators need microprocessors with a single chip to work. But how do you activate the microprocessor? It all starts with the information in the exterior of the device. The majority of modern calculators have a durable plastic casing, with small holes in the front, which allow rubber to push through, as a television remote would. By pressing a button, you complete a circuit under the rubber, which sends electrical impulses across a circuit board beneath. These impulses travel through the microprocessor. It interprets the information and transmits an indication to the display screen of the calculator. The displays in the early electronic calculators were constructed of LEDs, or light emitting diodes . Contemporary models that use less power use the liquid crystal display which is also known as LCD. Instead of producing light, LCDs move light molecules around to form...
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