Hoang Lihuo

Abou t 7 Segment : 7 Segment  is a form of electronic  display device  for displaying  decimal   numerals  that is an alternative to the more complex  Dot matrix Displays . Components: The creation process 7 Segment Lighting There are seven different types of display boxes. So we need to find the Boolean Expression To allow the fire to continue if the fire exceeds the required temperature. Step 1 First, we come to the Datasheet, or each of its legs, as we can see in the left-most three-dimensional images of Seg g's feet, and then of Seg f . Is the leg of the Gound , and the right is the Seg a foot, and the right is the Seg b foot. The middle one is the Gound leg , then the middle is the Seg c foot To the right is the foot of the DP or Decimal point. Step 2 We have a new 4 Digit table from A, B, C, D that represents any Digit that gets a value from a , b , c , d , e , f , g of 7 Segment. w...

Ans :  https://www.youtube.com/watch?v=D6ebl4rlybM&t=4s

1. Definitions The OR gate is an electronic device which receives two inputs each in the form of a binary digit, that is 0 or 1, and produces a binary digit as output, depending upon the values of the two inputs. It is represented by the symbol shown in Figure 5.5. A and B are the two inputs, and F is the single output. As high (1) or low (0) voltages are applied to A and B various possible outputs are achieved, these being de ned by means of a truth table as shown in Table 5.3. So, for example, if a low (0) voltage is applied to A and a high (1) voltage is applied to B, the output is a high (1) voltage at F. We note that a ‘1’ appears in the right-hand column of the truth table whenever A or B takes the value 1, hence the name OR gate. We use the symbol + to represent OR. Because it connects the variables A and B, OR is known as a logical connective.We shall meet other logical connectives shortly. This connective is also known as a disjunction, so that A + B is said to b...

2. Write Boolean expressions for the output from the devices shown in Figure 5.21. Ans:                    3. Design electronic devices which produce the following outputs: Ans:  5. Use truth tables to verify that the following pairs of expressions are logically equivalent: Ans : 7.  Simplify the following Boolean expressions using the laws of Boolean algebra: Ans: 10. Derive Boolean expressions and truth tables for the  circuits shown in Figure 5.22. Ans: 11. Simplify the following Boolean expressions using  Boolean algebra: Ans: 12. The truth values of the Boolean expression, X, are  given in the following tables. Write X in disjunctive  normal form.  Use the laws of Boolean algebra to  simplify your expressions. Ans: ...

Ans :       Commutative laws                             Ans:          Associative laws Ans:         Distributive laws       Ans:            Identity laws Ans:         Complement laws Ans:          Absorption laws Ans:         Minimization laws Ans:         De Morgan’s laws