sophie's world

stuff i worked on

"It is our choices, Harry, that show what we truly are, far more than our abilities."

adc vlsi

Sigma-delta ADC

Created an 8-bit sigma-delta ADC, consisting of analog and digital components. With a full adder cell as a base component, made an FIR filter to remove ripples from the previous filter stage.

More details here.


Wild Bodies: IMU collision detection

Shape-Changing Wild Bodies is a proof-of-concept for shape-morphing swarm robots with stochastic movement. Ran tests with IMU to find and detect collision threshold. Read the paper here.
See the PPT here.
wild bodies


hana technologies

RFID Tire Tags Measurement Systems Analysis (MSA)

Tested the variability of measuring devices for desired precision to tolerance ratio and accessed the quality of a measurement system. Helped to conduct a full gage repeatability & reproducibility (gage r&r) for the RFID tire tag process.

More details here.


Neural recording array front-end

We made a neutral recording array schematic and layout in Cadence that takes the raw inputs of the brain and amplifies the signals with a low noise amplifier, then passes the signals through a bandpass filter to eliminated the unwanted noise, and finally passed the 16 channels to a 16:1 analog multiplexer to select a single signal to output.

Read the report here.
See the PPT here.
UNITE Architecture


ece 5725 robo photo

Go 2 Class 4 Me Robot

The goal for this project is to wirelessly be able to control a robot using a phone from any location in a building. The user will be able to see and hear what the robot sees and hears through the phone interface. In the end, this system could possibly attend class for a student, amongst other things! We used an Android phone's accelerometer to control the movement of the Raspberry Pi robot.

See the website here.


Wearable Watch Application: UNITE

Worked with the Samsung Gear Sport Watch application to be able to ubiquitously monitor health parameters of pregnant expecting mothers to prevent preterm births.

Read the paper here.
See the poster here.
UNITE Architecture


Instagram Favorites photo

Instagram Concept: Prioritizing Your Favorite People 🌟

Explored prioritorization on Instagram by creating a "Favorites" concept. Featured in the Prototyr publication with over 100k followers.

Read it on Medium.


Physical Intelligent Systems

Built a small robot using Arduino that is able to follow lines, detect walls, start at a tone, detect other frequencies, follow Dijkstra’s algorithm to map a maze, and communicate the path wirelessly to a base station.
Website built by me.

See the website here.
ECE 3400 website photo


Single Cycle Processor
Single Cycle Processor Diagram

Digital Logic and Computer Organization

Learned about transistor network design, Boolean algebra, combinational circuits, sequential circuits, finite state machine design, processor pipelines, and memory hierarchy. Design methodology using both discrete components and hardware description languages. Coded a single cycle processor CPU to implement a heart rate monitor test. Implemented the arithmetic logic unit, program counter, decoder, register file, sign extend, multiplexers, halt logic, branch select, offset in Verilog.

See full report here.


Yang-Tan Institute (YTI) Web Development Team

  • I redesigned a template module (used for 17 different client websites) using HTML/CSS for managers hiring people with disabilities in Drupal and helped migrate from Drupal 7 to 8.
  • Worked on the NYS CASE project, a project to help people with disabilities acquire the skills they need to succeed in the workforce, by helping redesign the admin panel. Used PHP, JavaScript, HTML.
  • Added podcast ordering features to the admin panel of transitionsource.org, a website that allows students with disabilities to communicate and get information. Used PHP, JavaScript.

    • See the YTI mission here.
    transitionsource.org podcasts


    IEEE website

    IEEE Web Team

    Worked in a small team to maintain the website for IEEE (Electrical and Electronics Engineers) club. Attended meetings, volunteered at club events, and worked to add necessary items to website.

    See website here.


    Photo Querying Website Project

    Learned about server side processing and interactions with databases and querying using SQL through this photo gallery website handling file uploads and tags. It is a project that I used to show some of my favorite Korean dramas.

    See the website here.
    username: gkthgml | password: sophiehe20
    Photo Project


    My Golden Life website

    My First Website: 'My Golden Life'

    The very first website I ever made. I did not know much about design concepts, but learned a lot of HTML/CSS through the making of this website. I was frustrated at first, but as I slowly understood more concepts of HTML and CSS, I found it to be quite enjoyable and was willing to put time into it.

    See website here.