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Designing a Circuit with Two Switches to Control a Motor, Assignments of Mechanical Engineering

Rose-Hulman Institute of Technology (RHIT)Mechanical Engineering

Instructions for designing a circuit on paper using two common momentary single pole double throw (spdt) switches to control a motor. The motor should only run when both switches are pressed at the same time. The document also includes details about the components required, such as a motor, logic gates, transistor, and other items. Students are asked to turn in a schematic of the circuit and answers to related questions.

Typology: Assignments

Pre 2010

Uploaded on 08/19/2009

koofers-user-76c 🇺🇸

10 documents

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Download Designing a Circuit with Two Switches to Control a Motor and more Assignments Mechanical Engineering in PDF only on Docsity! Homework Goal: Design (on paper) a circuit that uses two switches to control a motor. The motor should only run when both switches are pressed at the same time. Details: Switch—We will use a different type of switch than we have used in class and lab. The switch is called a “common momentary Single Pole Double Throw (SPDT)” switch, and it is shown in the pictures below. The symbol for the switch is: When the switch is not pressed, the middle leg is connected to the left leg. When the switch is pressed, it connects the middle leg to the right leg. Motor—Assume that the motor needs a 9 volt power supply, and has a resistance of 35 ohms. Logic Gates—Assume that the AND gate is a 74LS08 Transistor—You will need a transistor to run the motor (as you saw in Lab 2). Use the 2N3904 NPN BJT transistor. The data sheet for this transistor is on the courseware page under the “small signal NPN” heading. Other items—Please use the standard symbols shown below in your schematic.

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