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Seven segment displays

Seven segment displays

These display elements consist of seven separately switchable bars and a decimal point. Mostly they are used to display numbers, but also – mostly lower-case – letters and symbols. The are generally controlled by integrated decoder circuits which are mounted on a compact chip and are easy to install. Each bar has its own LED. They typically use the signal colours red and green, but all other colours are also available. The displays can be multi-digit and are available both as SMD devices and for surface-mounted installation. The advantages of such a display are its good legibility – even at long instances – and their rapid updating response. Perhaps the best-known example of the seven-segment display is the digital clock; but they are also used in meters, measurement devices, lifts and machine control panels.

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