ENME 351 - Assignment 1

pdf

School

University of Maryland *

*We aren’t endorsed by this school

Course

351

Subject

Mechanical Engineering

Date

Feb 20, 2024

Type

pdf

Pages

Uploaded by ChefZebra4086

ENME 351 Assignment #1 Mitchell, Spring 2024 Page 1 of 3 ENME 351 – Electronics & Instrumentation II: Spring 2024 Department of Mechanical Engineering Due Date Thursday, February 1 st , 2024 Submission Information  Submit via Gradescope by 11:59 pm  Include your name, UID, date, assignment number, and signature on the top of the first page.  Clearly identify your final answers to each problem by drawing a box around each answer. No credit will be awarded for ambiguous answers. Problem #1 (2 points) Navigate to https://youtu.be/o5Cv9fvajrc and review the video on the design and implementation of a self-correcting golf club. For this mechatronic system, identify any/all: a) sensors b) actuators c) electronics/computation elements Now navigate to https://www.youtube.com/watch?v=rhWaHSUVGco and review the video on the design and implementation of an automatic shirt folding machine. For this mechatronic system, once again identify any/all: a) sensors b) actuators c) electronics/computation elements Problem #2 (2 points) In base- X , 63 X = 51 10 . What is the value of X ? Show all work to receive credit. Problem #3 (4 points) Digital waveforms Input A and Input B are provided to a two-input XNOR gate as shown below. Sketch the Output Waveform on the blank graph. Clearly label your axes.

ENME 351 Assignment #1 Mitchell, Spring 2024 Page 2 of 3

ENME 351 Assignment #1 Mitchell, Spring 2024 Page 3 of 3 Problem #4 (5 points) You have been asked to design a logic circuit to open a lock when a user enters the correct number on each of two numpads. Your final circuit design must use the minimum number of wires possible . For this particular lock, the correct combination to open the lock is 8 (on numpad 1) and 3 (on numpad 2). For reference, an open lock corresponds to F = 1, and the binary to decimal coding for each possible number pressed is provided below. The 4-bit numbers generated by each numpad range from 0000 to 1001 (values 1010 or higher are not possible in this scenario). To begin, write a Boolean expression for the output F in terms of a through h . Then create two logic circuits, one that verifies the decimal number 8 , and one that verifies the decimal number 3 . Then combine the outputs of these two circuits into an AND gate. Sketch the complete logic circuit that opens the lock. Problem #5 (7 points) Consider designing a seatbelt warning system for a passenger automobile, where a warning light ( W ) will be illuminated on the dashboard under the following conditions: 1. The driver ( D ) is seated in the driver’s seat 2. The driver has not buckled ( B ) his/her seatbelt 3. The automobile’s ignition ( I ) switch is on a) What are the input(s) to this system? What are the output(s)? Write the Boolean expression that most accurately describes the warning system logic circuit. b) Construct the truth table for the warning system. Under what condition(s) would the warning light be HIGH/illuminated? Does this make sense, from a design perspective? Comment briefly. c) Sketch the digital logic circuit describing the warning system. Are there circuit designs that are more efficient that others? Comment briefly. d) For each input to the warning system, give an example of what physical property must be measured (i.e. “sensed”) for the input to switch from LOW to HIGH. For example, sensing the presence of the driver in the driver’s seat might be accomplished by measuring a change in weight. Comment briefly on each input.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version