Engineering
Design Center

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Engineering
design courses
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Engineering design
graduates
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Engineering
design-focused
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2024 Design
Day projects

Save the Date! Design Day 2025 is on April 29.

Save the Date! Design Day 2025 is on April 29.

CMOS Imager

This work presents the design, simulation, and layout of a CMOS active pixel sensor (APS) employing a three-transistor (3T) architecture with integrated column-parallel readout. Each pixel consists of a reset switch, source-follower amplifier, and row-select device, interfacing with a photodiode that generates a photocurrent proportional to incident illumination. A current-mode column readout circuit enables robust signal acquisition and biasing. Pixel functionality is validated through transient simulations utilizing modeled photocurrents and bias voltages. Row and column scanning are achieved using custom C²MOS shift registers to facilitate sequential raster readout. A 4×4 pixel array is implemented and laid out within a 2.5 mm × 2.5 mm die area, achieving full DRC and LVS compliance. The design demonstrates high fill factor, low-power operation, and scalability, providing a foundation for future monolithic CMOS imaging systems.

Counting Random Walk Labelings of Caterpillar Graphs

We examine the total number of random walk labelings of various graphs, focusing specifically on caterpillar graphs. Random walk labelings are based on walks along graph edges where each previously unvisited vertex is labeled in increasing order. A caterpillar graph has a path of n vertices (the “backbone”), with additional vertices connected by edges (‘legs”) to the backbone. Each leg connects to only one backbone vertex, and leg vertices connected to different backbone vertices cannot be connected to each other; however, legs from the same backbone vertex may connect freely. We focus on symmetric caterpillars, where each backbone vertex has the same configuration of j legs. Configurations include standard caterpillars and those where legs induce a complete graph or path. We find a general formula for the number of labelings for any such symmetric configuration and derive a closed-form expression for the standard caterpillar of length n with j legs.

Taliyah

Biomedical Engineering

It is wonderful to watch students from different departments work together to support better engineering design opportunities at Hopkins.

To identify what can satisfy students from every engineering perspective has been both challenging and rewarding, as I’ve learned leading the multidisciplinary student advisory board for the Design Center.

Kareem

Computer Engineering

The First Year Seminar Design CornerStone helped me get exposed to a wide range of engineering disciplines and introduced me to all the makerspace and departments opportunities at Hopkins!

I am excited to take advantage of all the resources available to strengthen my engineering skills.

Alexander

Materials Science and Engineering

Being granted the opportunity to lead a design team has offered me the skillset necessary to apply both engineering and leadership skills in a collaborative environment. I look forward to utilizing these experiences in the medical device space!

 
DnATA
Team Members: Julian Chow, Resham Talwar, Varen Talwar Department: Chemical and Biomolecular…
 
Blue Hydrogen from Steelmaking Off-gas: a Techno-economic Feasibility Assessment
Team Members: Aidan Gee, Timothy Kwok, Laurent Ludwig, Raiyan Sakib Department: Chemical…