Calculator
Calculator Components If you've read through the previous page, you'll be aware by now that handheld calculators need single-chip microprocessors to perform their functions. But how do you activate the microprocessor? It all starts with the information in the exterior of the device. A lot of modern calculators are constructed of a strong plastic casing, with simple openings in the front to allow rubber to penetrate, just like a television remote. By pressing a button you complete a circuit under the rubber. This sends electrical signals through a circuit board below. These impulses travel through the microprocessor that interprets the information and sends a readout to the calculator's display screen. The displays of most early electronic calculators were constructed of LEDs, or lights-emitting diodes . Modern models that consume less power include the liquid crystal display also known as LCD. Instead of producing light LCDs move light molecules around t...
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