Question

Construct the switching circuit of the following:

(p ∧ ∼ q ∧ r) ∨ [p ∧ (∼ q ∨ ∼ r)]

Answer 1

Let p: the switch S₁ is closed
      q: the switch S₂ is closed
       r: the switch S₃ is closed
  ∼ p: the switch S₁′ is closed or the switch S₁ is open
  ∼ q: the switch S₂′ is closed or the switch S₂ is open
  ∼ r: the switch S₃′ is closed or the switch S₃ is open.

Then the switching circuit corresponding to the given statement pattern is: