COMPUTER SCIENCE AND ENGINEERING
DIGITAL LOGIC
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a, b, d, e, and g
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a, b, c, d, and g
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a, c, d, f, and g
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a, b, c, d, e, and f
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Detailed explanation-1: -To display two digits the easiest way would be to connect one digit to an unused port, A or B or D. But If you want to do it with the schematic you have then you need to time divide. Turn on one transistor and drive port C with the value for the associated LEDs.
Detailed explanation-2: -The seven elements of the display can be lit in different combinations to represent the Arabic numerals. The segments are referred to by the letters A to G, where the optional decimal point (an “eighth segment", referred to as DP) is used for the display of non-integer numbers.
Detailed explanation-3: -A digital or binary decoder is a digital combinational logic circuit which can convert one form of digital code into another form. BCD to 7-segment display decoder is a special decoder which can convert binary coded decimals into another form which can be easily displayed through a 7-segment display.
Detailed explanation-4: -To turn on a segment, you set its associated pin to HIGH (figure 2). Figure 1: Seven segment common cathode display. In a Common Anode (CA) seven segment display (figure 3) the anodes (positive terminals) of all of the segments are connected together. Figure 4: CA display, segment pins b and c set to LOW.