Project

# Title Team Members TA Documents Sponsor
34 Music-Visualization and Motion-Controlled LED Cube
Hieu Huynh
Islam Kadri
Zihan Yan
Zhen Qin design_review
other
proposal
Members:
Hieu Tri Huynh, NetID: hthuynh2 (hthuynh2@illinois.edu)
Islam Kadri, NetID: ikadri2 (ikadri2@illinois.edu)
Zihan Yan, NetID: zyan9 (zyan9@illinois.edu)

Link to discussion: https://courses.engr.illinois.edu/ece445/pace/view-topic.asp?id=22725

Background:
Our project’s main inspiration came from a video about an art piece called Kinetic Rain at Singapore’s Changi Airport (https://www.youtube.com/watch?v=jhP9n6WvVfQ). Instead of bronze droplets, we’d like to use a cube of LEDs achieve the same effect and additional features.

Description:
Our project goal is to build a LED cube of size 10*10*10 with 2 features. Every 10 LEDs will be on the same wire and the wires will be supported by a board at the bottom. User can switch between these 2 features/modes by using a button on the board.

Feature 1. Music Visualization. This LED device will have microphones attached to it to listen to sound. The sound will then be analyzed and four values will be extracted and used: frequency, amplitude, angle of arrival, and beat per minute (bpm). The LED colors and configuration will adjust based on these values.

Frequency: Frequency will be used to control the color of the LED. To extract the frequency from the sound, we will use the short-time Fourier transform (STFT) algorithm.

Amplitude: Amplitude will be used to control the brightness of the LEDs.

Angle of Arrival: This value will be used to control the orientation of the animation of LEDs. In order to detect the angle of arrival in a 2D plane (0-360 degrees horizontal plane), we will use 3 microphones, and the Generalized Cross Correlation – Phase Transform (GCC-PHAT).

Beat per Minute (BpM): This value will be used to control the speed of the movement of the animation.

Feature 2. 3D Snake game. We would like to implement a 3D Snake game so that a user can play using this LED device. The Snake will be controlled by a user hand's motions.

Display: We will turn off all the LEDs except the Snake (initially a small length of LEDs) and the fruit (one LED with different color) to create the movement of the Snake. The length of the snake will grow larger as the user captures more fruit.

Hand Motion Detection: We will create a pad that has 4 proximity sensors on the board. The user will move his hand above the pad, and we will use the values of those sensors to detect the motion. For example, if the user moves his hand from Left to Right, the sensor on the left will change its value before the sensor on the Right. Based on those difference in value of 4 sensors, we will be able to detect the motion of user’s hand in 6 different directions (Up, Down, Left, Right, Outward, Inward)

Hardware:
We are thinking of using either a Raspberry Pi or an Arduino for the controller unit. We will design the circuit for the LEDs.

Uniqueness:
Our project is innovative and unique because it serves as an aesthetic project, like the Kinetic Rain project, with the additional use of sound as an input to affect the LED's color and shape. There are a few existing products that can visualize music using a sound's frequency, but none of them extract the previously mentioned 4 categories (frequency, amplitude, angle of arrival, and BpM) to influence the LEDs. Therefore, by extracting all 4 values listed above, we will be able to create a more visually appealing and accurate device.

Furthermore, by implementing the 3D Snake game, we will fully utilize the resource (LEDs) to increase the entertainment factor of the device and will also encourage the user to interact with it, as well as having a more hands-on use.

Recovery-Monitoring Knee Brace

Dong Hyun Lee, Jong Yoon Lee, Dennis Ryu

Featured Project

Problem:

Thanks to modern technology, it is easy to encounter a wide variety of wearable fitness devices such as Fitbit and Apple Watch in the market. Such devices are designed for average consumers who wish to track their lifestyle by counting steps or measuring heartbeats. However, it is rare to find a product for the actual patients who require both the real-time monitoring of a wearable device and the hard protection of a brace.

Personally, one of our teammates ruptured his front knee ACL and received reconstruction surgery a few years ago. After ACL surgery, it is common to wear a knee brace for about two to three months for protection from outside impacts, fast recovery, and restriction of movement. For a patient who is situated in rehabilitation after surgery, knee protection is an imperative recovery stage, but is often overlooked. One cannot deny that such a brace is also cumbersome to put on in the first place.

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Solution:

Our group aims to make a wearable device for people who require a knee brace by adding a health monitoring system onto an existing knee brace. The fundamental purpose is to protect the knee, but by adding a monitoring system we want to provide data and a platform for both doctor and patients so they can easily check the current status/progress of the injury.

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Audience:

1) Average person with leg problems

2) Athletes with leg injuries

3) Elderly people with discomforts

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Equipment:

Temperature sensors : perhaps in the form of electrodes, they will be used to measure the temperature of the swelling of the knee, which will indicate if recovery is going smoothly.

Pressure sensors : they will be calibrated such that a certain threshold of force must be applied by the brace to the leg. A snug fit is required for the brace to fulfill its job.

EMG circuit : we plan on constructing an EMG circuit based on op-amps, resistors, and capacitors. This will be the circuit that is intended for doctors, as it will detect muscle movement.

Development board: our main board will transmit the data from each of the sensors to a mobile interface via. Bluetooth. The user will be notified when the pressure sensors are not tight enough. For our purposes, the battery on the development will suffice, and we will not need additional dry cells.

The data will be transmitted to a mobile system, where it would also remind the user to wear the brace if taken off. To make sure the brace has a secure enough fit, pressure sensors will be calibrated to determine accordingly. We want to emphasize the hardware circuits that will be supplemented onto the leg brace.

We want to emphasize on the hardware circuit portion this brace contains. We have tested the temperature and pressure resistors on a breadboard by soldering them to resistors, and confirmed they work as intended by checking with a multimeter.

Project Videos