Interfacing seven segment to microcontroller

The Tutorial shows how to interface 7-segment display to a microcontroller. Also explains how do display more than one 7-segment on same data lines using scanning method. 7 Seg displays are are basically 7 LED's. It will be much easier to understand if you first read Interfacing LED's to Microcontroller.
Interfacing seven segment to microcontroller - schematic

Figure 1 shows how to interface 7-seg display to a microcontroller. Now we create a lookup table containing the seven segment pattern to display the corresponding hex digits. e.g. consider we have to display '1' from the above figure we come to know tha

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