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interfacing of 7 segment led with 8051 pdf


#1

how does 8051 working with seven segmen
display
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#2
The 7-segment LED display is very popular and can display digits 0 through 9 and many characters like A, B, C,., H, E, e, F, n, o, t, u, and, etc. Knowledge about how to interconnect a seven-segment display with a microcontroller is very essential in the design of integrated systems. A seven-segment display consists of seven LEDs arranged in the form of a quadrangular '8' slightly inclined to the right and a single LED as the dot character. Different characters can be displayed by selectively illuminating the required LED segments. The seven-segment displays are of two types, common cathode and common anode. In the common cathode type, the cathode of all LEDs is attached to a single terminal which is generally labeled 'com' and the anode of all LEDs is left alone as individual pins labeled as a, b, c, d, e, f, g & h (or dot). In the common anode type, the anode of all LEDs are joined together as a single terminal and the cathodes are left alone as individual pegs. The pin out scheme and the image of a typical 7 segment LED display are shown in the image below.

[Image: 7-segment-LED-display-pinout-image.png]
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