NOR gate S-R latch

Chapter 7.3 NOR gate S-R latch

Lessons In Electric Circuits Volume VI – Experiments Book
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Summary of Contents

Lessons In Electric Circuits Volume VI – Experiments Book

  • 7.3. NOR GATE S-R LATCH3377.3NOR gate S-R latchPARTS AND MATERIALS• 4001 quad NOR gate (Radio Shack catalog # 276-2401)• Eight-position DIP switch (Radio Shack catalog # 275-1301)• Ten-segment bargraph LED (Radio Shack catalog # 276-081)• One 6 volt battery• Two 10 kΩ resistors• Two 470 Ω resistors• Two 100 Ω resistorsCaution! The 4001 IC is CMOS, and therefore sensitive to static electricity!CROSS-REFERENCESLessons In Electric Circuits, Volume 4, chapter 3: ”Logic Gates”Lessons In Electric Circuits, Volume 4, chapter 10: ”Multivibrators”LEARNING OBJECTIVES• The effects of positive feedback in a digital circuit• What is meant by the ”invalid” state of a latch circuit• What a race conditionis in a digital circuit• The importance of valid ”high” CMOS signal voltage levelsSCHEMATIC DIAGRAM6 V1/4 40011/4 400110kΩ470ΩILLUSTRATION