Project

# Title Team Members TA Documents Sponsor
52 LED Globe Display
 Ashley Saju
David Heydinger
Stephanie Eze
 Shiyuan Duan
# LED Globe Display
Team Members:
- Ashley Saju(asaju2)
- David Heydinger (ddh3)
- Stephanie Eze (oeze2)
# Problem
For LabEscape, an escape room under Prof. Kwait, a unique LED display would be beneficial to the escape room experience. A spinning LED display should be able to show a timer count down and wirelessly show any image.
# Solution
We will design a curved LED strip to be mounted on a rotating platform that spins at a constant speed. Through a Bluetooth enabled app, we can upload images and text to the image display system for storage and playback. These images will be displayed using persistence of vision by precisely controlling LED light timing based on the angular position and speed of the platform. The position and speed of the platform will be measured by an Hall sensor that detects each revolution of the rotating system, allowing the system to accurately determine when to display certain LED lights.
# Solution Components
## Image Displaying System (Microcontroller, Memory, and LEDs)
This system handles the process of receiving the image wirelessly or taking a sprite from memory and lighting the LED appropriately. An SD card would be used to store sprites of numbers for the timer mode. Shift registers would be used to achieve a speedy parallel output to the LED. And the LEDs would be receiving a preset voltage at first then varying voltages if time allows for different colors. The potentiometer can be used to adjust LED color.
RP2040 microcontroller
Micro SD card > 16kB memory
24-bit Shift registers: STP24DP05 24-bit constant current LED sink driver with output error detection
RGB LEDs: Strawhat LED 4.8mm RGB (4-Pin) WEDRGB03-CM
10kOhm Potentiometer with knob
Resistors
## Wireless Control
The ESP32 hosts a web application that is accessible by entering the device’s IP address into a web browser. This web application allows a user to upload text or an image, which are processed by the ESP32 into a display-ready format. The processed data is then transmitted directly from the ESP32 to the spherical display system for rendering. The initial implementation supports monochrome bitmap images, with plans to extend to multi-color images in future revisions.
ESP32-WROVER-B
## Power System
Delivering power to the stationary motor will be provided by AAA batteries. However, delivering power to the spinning component is more difficult due to the potential for wires to be tangled. To solve this, we will drive power to the rotating platform using a slip ring, allowing for 360 degree rotation without twisting any electrical connections.
Components:
AAA battery pack [MIKROE-5351]
Power Switch [GSW-18]
Slip Ring [ADAFRUIT1196]
DC motor [CN-PA22-201213500-G429]
Voltage Regulator (buck converter)

## Spinning PCB - angular speed measurement
The spinning PCB will include a Hall effect sensor that will detect exactly when one full turn of the PCB has been completed. It will send the measurements to the microprocessor which will calculate the angular speed of the spinning PCB based on the time interval between measurements.
Components:
Hall effect sensor [US5881LUA]
Voltage Regulator [MIC5219-3.3]
Small Magnet [07045HD]

# Criterion For Success
Describe high-level goals that your project needs to achieve to be effective. These goals need to be clearly testable and not subjective.
When operating at full speed, the displayed text and image should be clearly legible from 5 feet away over a period of 10 minutes.
The rotating assembly remains balanced while operating, with no audible thumping exceeding 50 dB or visible oscillation for the duration of 10 minutes.
The LED Globe successfully receives and displays image and text uploads within 1 minute per image, without requiring any physical connections.
A Hall effect sensor accurately detects when the rotating assembly has completed one revolution, with less than 2% missed detections over 10 minutes.
LED brightness is sufficient to display images and text from 5 feet away under standard indoor lighting (300 lux).
Timer mode: Timer can be set to a time up to 1 hour in the web application and counts down, resets, and pauses via web application..

Cloud-controlled quadcopter

Anuraag Vankayala, Amrutha Vasili

Cloud-controlled quadcopter

Featured Project

Idea:

To build a GPS-assisted, cloud-controlled quadcopter, for consumer-friendly aerial photography.

Design/Build:

We will be building a quad from the frame up. The four motors will each have electronic speed controllers,to balance and handle control inputs received from an 8-bit microcontroller(AP),required for its flight. The firmware will be tweaked slightly to allow flight modes that our project specifically requires. A companion computer such as the Erle Brain will be connected to the AP and to the cloud(EC2). We will build a codebase for the flight controller to navigate the quad. This would involve sending messages as per the MAVLink spec for sUAS between the companion computer and the AP to poll sensor data , voltage information , etc. The companion computer will also talk to the cloud via a UDP port to receive requests and process them via our code. Users make requests for media capture via a phone app that talks to the cloud via an internet connection.

Why is it worth doing:

There is currently no consumer-friendly solution that provides or lets anyone capture aerial photographs of them/their family/a nearby event via a simple tap on a phone. In fact, present day off-the-shelf alternatives offer relatively expensive solutions that require owning and carrying bulky equipment such as the quads/remotes. Our idea allows for safe and responsible use of drones as our proposed solution is autonomous, has several safety features, is context aware(terrain information , no fly zones , NOTAMs , etc.) and integrates with the federal airspace seamlessly.

End Product:

Quads that are ready for the connected world and are capable to fly autonomously, from the user standpoint, and can perform maneuvers safely with a very simplistic UI for the common user. Specifically, quads which are deployed on user's demand, without the hassle of ownership.

Similar products and comparison:

Current solutions include RTF (ready to fly) quads such as the DJI Phantom and the Kickstarter project, Lily,that are heavily user-dependent or user-centric.The Phantom requires you to carry a bulky remote with multiple antennas. Moreover,the flight radius could be reduced by interference from nearby conditions.Lily requires the user to carry a tracking device on them. You can not have Lily shoot a subject that is not you. Lily can have a maximum altitude of 15 m above you and that is below the tree line,prone to crashes.

Our solution differs in several ways.Our solution intends to be location and/or event-centric. We propose that the users need not own quads and user can capture a moment with a phone.As long as any of the users are in the service area and the weather conditions are permissible, safety and knowledge of controlling the quad are all abstracted. The only question left to the user is what should be in the picture at a given time.

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