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suchthatforeveryelementxandy bs

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Unformatted text preview: be turned on manually, or by the use of a timer, so long as a light sensor indicates that it is dark. Draw the truth table and then the logic diagram. I/P : S – manual switch (S=1) T – timer (T=1) L – light sensor (L=0) O/P: SL – street light (SL=1) I/P : S – manual switch (S=1) T – timer (T=1) L – light sensor (L=0) O/P: SL – street light (SL=1) S 0 0 0 0 1 1 1 1 T 0 0 1 1 0 0 1 1 L 0 1 0 1 0 1 0 1 SL 0 0 1 0 1 1 1 1 11 10/13/2011 Boolean algebra Boolean algebra set • We encounter situations where the choice is binary Move –Stop, On – Off, Yes ‐ No • An intended action takes place or does not take place • Signals with two possible states are called switching signals. • We need to work with a large number of such signals • There is a need for formal methods of handling such signals A Boolean algebra consists of • a finite set BS • subject to equivalence relation "=" • one unary operator "not" (symbolised by an over bar) • two binary operators...
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This note was uploaded on 05/05/2013 for the course ELEC 1111 taught by Professor Jayashriravishankar during the One '11 term at University of New South Wales.

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