Question

LEDs are widely used in seven segment displays. Such displays are used in calculators electronic balances, watches, digital instruments, etc. When diodes A,B,C,D,F and G are forward biased the digit 9 is displayed. Observe how digits 0 to 9 are displayed by activating varies diodes.

Answer 1

Using the segment labels in the question, the segments to activate are: 0—A, B, C, D, E, F; 1—B, C; 2—A, B, D, E, G; 3—A, B, C, D, G; 4—B, C, F, G; 5—A, C, D, F, G; 6—A, C, D, E, F, G; 7—A, B, C; 8—A, B, C, D, E, F, G; 9—A, B, C, D, F, G.