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Circuit drawn in the previous page can be redrawn as an 8*8 LED matrix as shown below. LED matrix arrangement of seven segment display will help to control the displays easily.
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Each rectangular box represents one common cathode seven segment display. From the circuit, it is clear that, each rectangular box has eight anode terminals (a, b, c, d, e, f, g and dp) and one cathode terminal.
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"a" terminal of all the seven segment displays are interconnected to form a common "a" terminal. Similarly, "b" terminal of all the seven segment displays are interconnected to form a common "b" terminal. Same connections are repeating for c, d, e, f, g and dp terminals. One cathode terminal is common to all the anode terminals of corresponding seven segment display. This will look like an 8*8 LED matrix and controlling can be done in the same way in which 8*8 LED matrix is controlled.
Each rectangular box represents one common cathode seven segment display. From the circuit, it is clear that, each rectangular box has eight anode terminals (a, b, c, d, e, f, g and dp) and one cathode terminal.
"a" terminal of all the seven segment displays are interconnected to form a common "a" terminal. Similarly, "b" terminal of all the seven segment displays are interconnected to form a common "b" terminal. Same connections are repeating for c, d, e, f, g and dp terminals. One cathode terminal is common to all the anode terminals of corresponding seven segment display. This will look like an 8*8 LED matrix and controlling can be done in the same way in which 8*8 LED matrix is controlled.
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