4 switches are part of the control circuitry in a copy machine. The switches are at various points along the path of the paper as paper passes through the machine. Each switch is normally OPEN and as the paper passes over a switch, the switch CLOSES. It is impossible for SW1 and SW4 to be closed the same time since they are far apart. The paper has a strip in the middle which may not be sensed by the middle switches as paper passes over them.The LED is to light if two 2 or more switches are closed. Design a Combinational Logic circuit using NAND gates only for the system.

4 switches are part of the control circuitry in a copy machine. The switches are at various points along the path of the paper as paper passes through the machine. Each switch is normally OPEN and as the paper passes over a switch, the switch CLOSES. It is impossible for SW1 and SW4 to be closed the same time since they are far apart. The paper has a strip in the middle which may not be sensed by the middle switches as paper passes over them.The LED is to light if two 2 or more switches are closed. Design a Combinational Logic circuit using NAND gates only for the system.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter32: Two-speed, One-winding (consequent Pole) Motor Controllers

Section: Chapter Questions

Problem 6SQ: Describe the operation of Figure 325 (B) by adding jumper wire A to the original circuit.

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