Elenco Understanding Logic Gates and Circuits Manual do Utilizador Página 1

U17Project 3: OR GateThis circuit demonstrates how the OR Gate(U17) works. Turn the slide switch (S1) on.Connect the loose ends of the red andblack wi

U18Project 4: NAND GateThis circuit demonstrates how the NANDGate (U18) works. Turn the slide switch (S1)on. Connect the loose ends of the red andblac

U19Project 5: NOR GateThis circuit demonstrates how the NOR Gate(U19) works. Turn the slide switch (S1) on.Connect the loose ends of the red and black

U20Project 6: Exclusive OR (XOR) GateThis circuit demonstrates how the ExclusiveOR (XOR) Gate (U20) works. Turn the slideswitch (S1) on. Connect the l

U17Project 7: De Morgan’s LawNegation of ConjunctionThis circuit demonstrates De Morgan’s Law ofNegation of Conjunction which states that thenegation

Project 8: De Morgan’s LawNegation of DisjunctionThis circuit demonstrates De Morgan’s Law ofNegation of Disjunction which states that thenegation of

U19Project 9: S-R NOR LatchThis circuit demonstrates how the S-R NOR Latch works.Turn the slide switch (S1) on. Connect the loose end ofthe red wire (

1U18U18Project 10: S-R NAND LatchThis circuit demonstrates how the S-R NAND Latchworks. Turn the slide switch (S1) on. Connect the looseend of the red

U19U16Project 11: Gated S-R Latch The Enable input (E) can be used as a clock input, or a read/write strobe.1U19U16111113221222223233RS122222232E2This

U19Project 12: J-K Latch This circuit demonstrates how a J-K Latch works. Turnthe slide switch (S1) on. Connect the loose ends ofthe red and black jum

OutlineWarning: Shock Hazard – Never connect Snap Circuits® to the electrical outlets in your home in any way!Warning: Choking Hazard – Small part

Project 12: J-K LatchKQInput (J) Input (K) Output (Q) Output (Q)0 0 Hold State Hold State1 0 1 00 1 0 11 1 Toggle ToggleJQ Stays the same when J=K=0

U19U15Project 13: Gated D Latch Details of the Gated D Latch Block Diagram and Logic Chart on Next Page.This circuit demonstrates how a Gated D Latch

Project 13: Gated D LatchDQQ Stays the same when E=0 Reset to 0 when D=0 & E=1 Set to 1 when D=1 & E=1EE D Output (Q) Output (Q)0 0 or 1 Ho

U19U15Project 14: Comparator Details of the Comparator Block Diagram and Logic Chart on Next Page.This circuit demonstrates how a comparator works. Tu

Project 14: ComparatorAQ Equal to 1 when A=B Equals 0 when A ≠ BA B Output (Q)0 0 10 1 01 0 01 1 1BComparators are used in Central Processing Units

U16U20Project 15: Half AdderThis circuit demonstrates how a half adderworks. Turn the slide switch (S1) on. Thegreen LED represents the Sum (S) and th

U15U16U20Project 16: Half SubtractorThis circuit demonstrates how a halfsubtractor works. Turn the slide switch (S1)on. The green LED represents the D

U17Project 17: Multiplexer Details of the Multiplexer Block Diagram and Logic Chart on Next Page.This circuit demonstrates how a multiplexer works. Tu

Project 17: MultiplexerAQB S represents the Selector Equals A when S=1 Equals B when S=0SInput (A) Input (B) Input (S) Output (Q)0 or 1 0 0 00 or 1

Quiz1. The output will be LOW (0) for any case when one or more input is LOW (0) for a(n):a) OR gateb) NAND gatec) AND gated) XOR gate2. The output of

Parts ListID Part Name Part Number QTY1 1-snap wire 6SC01 72 2-snap wire 6SC02 103 3-snap wire 6SC03 54 4-snap wire 6SC04 15 5-snap wire 6SC05 26 6-sn

Quiz4. Explain why S=R=1 is not allowed for the S-R NOR circuit.5. Using De Morgan’s laws, show how you can derive the S-R NAND gate circuit from the

Quiz7. What latch is the circuit in question 8 equivalent to?a) D Latchb) S-R NOR Latchc) S-R NAND Latchd) J-K Latch8. Show how you would create a gat

Quiz10. Show how a comparator can be built with only 2 gates.11. The figure below represents a full adder circuit. A & B are the inputs and Ci is

Quiz12. The figure below represents a full subtractor circuit. A & B are the inputs and Bi is the borrow input, while S is the output and Co is t

Quiz Answers1. The output will be LOW (0) for any case when one or more input is LOW (0) for a(n):a) OR gateb) NAND gatec) AND gated) XOR gate2. The o

Quiz Answers4. Explain why S=R=1 is not allowed for the S-R NOR Latch circuit.When S=R=1, this forces both the Q and Q outputs to always be low (0), t

Quiz Answers5. Using De Morgan’s laws, show how you can derive the S-R NAND gate circuit from the S-R NOR circuit. Note that the outputs of an S-R NOR

Quiz Answers6. Draw the truth table for the circuit below?7. What latch is the circuit in question 8 equivalent to?a) D Latchb) S-R NOR Latchc) S-R NA

Quiz Answers8. Show how you would create a gated S-R NAND latch.9. Which of the following is NOT true about a J-K latch:a) It has a “not allowed” stat

Quiz Answers11. The figure below represents a full adder circuit. A & B are the inputs and Ci is the carry input, while S is the output and Co is

IntroductionAnalog vs. Digital Waveforms Analog Waveform – can take on any voltage value Digital Waveform – takes on discrete voltage valuesTimeAnal

Quiz Answers12. The figure below represents a full subtractor circuit. A & B are the inputs and Bi is the borrow input, while S is the output and

Quiz Answers13. Design a 4-input multiplexer circuit.AQBS1CDS0When S0=S1 = 0, then Q=AWhen S0=1, S1=0, then Q=BWhen S0=0, S1=1, then Q=CWhen S0=S1=1,

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IntroductionDigital Signals Digital waveforms can be used to represent digital signals (e.g. 0 or 1, true or false), for example• 0 (false) – represe

IntroductionLogic Problem Statements Logic problems have outcomes (or outputs) that depend on events (or inputs). For example• The cuckoo clock make

IntroductionLogic Gates A digital logic gate is an Integrated Circuit (IC) device that makes logical decisions based on various combinations of digit

Project 1: NOT Gate (Inverter)AQInput (A) Output (Q)0 11 0U15This circuit demonstrates how the NOTGate (U15) works. Turn the slide switch(S1) on. Conn

U16Project 2: AND GateThis circuit demonstrates how the ANDGate (U16) works. Turn the slide switch(S1) on. Connect the loose ends of the redand black