Project

# Title Team Members TA Documents Sponsor
29 Modular LED Wall Panels
 Adam Chung
James Prince
Kyle Salzberg
 Hanyin Shao design_document3.pdf
final_paper1.pdf
photo1.jpg
photo2.jpg
presentation1.pdf
proposal1.pdf
## Team Members:
James Prince (jamestp3)
Kyle Salzberg(kylets2)
Adam Chung(hschung3)

## Problem:
In the past few years LED decorations and the IoT marketplace have grown widely in popularity. Many of the currently commercially available products are either very expensive or provide very little customizability to the user. These kinds of LEDs are a perfect smart device, allowing for technology to tie into your living space. However, solutions on the market today are limited in their capabilities. Most LEDs are available only as strips, with the few modular LED panels available, such as nanoleaf (see https://nanoleaf.me/en-US/), unable to display text or images. We would like to push the concept of LED decoration further, with LED panels capable of acting as displays.

## Solution:

We propose designing and implementing modular LED panels that are capable of displaying customizable text or images. The modular design allows for the user to connect together as many panels as needed, in relatively any shape or size, for the desired use.
Our solution could also provide a much more affordable option, with competitors having panels worth up to $60 a piece. With a modular design, users can easily control the array of panels as a single device for an improved user experience.

## Solution Components:
### LED Panels
Panel constructed with a grid of 8 x 8 ws2812b LEDs. We will most likely purchase these LEDs in a strip, then cut and reconfigure them into a grid. Doing this makes wiring easier and leaves less room for errors.

## Inter-panel communication
### In order to use each panel we will need to design a system for sending and receiving data between them. To do this we want to use small microcontrollers in each panel. These microcontrollers would determine the configuration of the panels by checking for signals on each side of the panel. Once the configuration is found, the microcontrollers would then be responsible for propagating the LED serial data to the correct panels. Finally each of these microcontrollers would be responsible for displaying their respective panels. We think that a LPC1110/xx would be best for this since it's cheap and low level. This subsystem would also need its own pcb for the microcontroller and connectors.

### Controller/Hub
In addition to the drivers on each display panel, we also need a central unit that controls the overall image. For this we want to use an ESP32 or related microcontroller with wifi and bluetooth. This controller would either connect to the user client through wifi or bluetooth. Time permitting, we would also like to connect this hub to IoT devices such as Alexa.

## Criterion For Success:
Panels can be attached and used in any way without need for user setup (recognizes panel configuration shape)
Panels are able to display text, images, and light effects that are adapted to current configuration
Able to wirelessly connect and be controlled by external devices (phone/computer)

Electronic Mouse (Cat Toy)

Jack Casey, Chuangy Zhang, Yingyu Zhang

Electronic Mouse (Cat Toy)

Featured Project

# Electronic Mouse (Cat Toy)

# Team Members:

- Yingyu Zhang (yzhan290)

- Chuangy Zhang (czhan30)

- Jack (John) Casey (jpcasey2)

# Problem Components:

Keeping up with the high energy drive of some cats can often be overwhelming for owners who often choose these pets because of their low maintenance compared to other animals. There is an increasing number of cats being used for service and emotional support animals, and with this, there is a need for an interactive cat toy with greater accessibility.

1. Get cats the enrichment they need

1. Get cats to chase the “mouse” around

1. Get cats fascinated by the “mouse”

1. Keep cats busy

1. Fulfill the need for cats’ hunting behaviors

1. Interactive fun between the cat and cat owner

1. Solve the shortcomings of electronic-remote-control-mouses that are out in the market

## Comparison with existing products

- Hexbug Mouse Robotic Cat Toy: Battery endurance is very low; For hard floors only

- GiGwi Interactive Cat Toy Mouse: Does not work on the carpet; Not sensitive to cat touch; Battery endurance is very low; Can't control remotely

# Solution

A remote-controlled cat toy is a solution that allows more cat owners to get interactive playtime with their pets. With our design, there will be no need to get low to the ground to adjust it often as it will go over most floor surfaces and in any direction with help from a strong motor and servos that won’t break from wall or cat impact. To prevent damage to household objects it will have IR sensors and accelerometers for use in self-driving modes. The toy will be run and powered by a Bluetooth microcontroller and a strong rechargeable battery to ensure playtime for hours.

## Subsystem 1 - Infrared(IR) Sensors & Accelerometer sensor

- IR sensors work with radar technology and they both emit and receive Infrared radiation. This kind of sensor has been used widely to detect nearby objects. We will use the IR sensors to detect if the mouse is surrounded by any obstacles.

- An accelerometer sensor measures the acceleration of any object in its rest frame. This kind of sensor has been used widely to capture the intensity of physical activities. We will use this sensor to detect if cats are playing with the mouse.

## Subsystem 2 - Microcontroller(ESP32)

- ESP32 is a dual-core microcontroller with integrated Wi-Fi and Bluetooth. This MCU has 520 KB of SRAM, 34 programmable GPIOs, 802.11 Wi-Fi, Bluetooth v4.2, and much more. This powerful microcontroller enables us to develop more powerful software and hardware and provides a lot of flexibility compared to ATMegaxxx.

Components(TBD):

- Product: [https://www.digikey.com/en/products/detail/espressif-systems/ESP32-WROOM-32/8544298](url)

- Datasheet: [http://esp32.net](url)

## Subsystem 3 - App

- We will develop an App that can remotely control the mouse.

1. Control the mouse to either move forward, backward, left, or right.

1. Turn on / off / flashing the LED eyes of the mouse

1. keep the cat owner informed about the battery level of the mouse

1. Change “modes”: (a). keep running randomly without stopping; (b). the cat activates the mouse; (c). runs in cycles(runs, stops, runs, stops…) intermittently (mouse hesitates to get cat’s curiosity up); (d). Turn OFF (completely)

## Subsystem 4 - Motors and Servo

- To enable maneuverability in all directions, we are planning to use 1 servo and 2 motors to drive the robotic mouse. The servo is used to control the direction of the mouse. Wheels will be directly mounted onto motors via hubs.

Components(TBD):

- Metal Gear Motors: [https://www.adafruit.com/product/3802](url)

- L9110H H-Bridge Motor Driver: [https://www.adafruit.com/product/4489](url)

## Subsystem 5 - Power Management

- We are planning to use a high capacity (5 Ah - 10 Ah), 3.7 volts lithium polymer battery to enable the long-last usage of the robotic mouse. Also, we are using the USB lithium polymer ion charging circuit to charge the battery.

Components(TBD):

- Lithium Polymer Ion Battery: [https://www.adafruit.com/product/5035](url)

- USB Lithium Polymer Ion Charger: [https://www.adafruit.com/product/259](url)

# Criterion for Success

1. Can go on tile, wood, AND carpet and alternate

1. Has a charge that lasts more than 10 min

1. Is maneuverable in all directions(not just forward and backward)

1. Can be controlled via remote (App)

1. Has a “cat-attractor”(feathers, string, ribbon, inner catnip, etc.) either attached to it or drags it behind (attractive appearance for cats)

1. Retains signal for at least 15 ft away

1. Eyes flash

1. Goes dormant when caught/touched by the cats (or when it bumps into something), reactivates (and changes direction) after a certain amount of time

1. all the “modes” worked as intended

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