# Title Team Members TA Documents Sponsor
14 Outdoor Smart Dog Feeder
Kevin Shi
Lucas Duduit
T'Andra Newby
Nithin Balaji Shanthini Praveena Purushothaman design_document3.pdf
# Outdoor Smart Dog Feeder
## Introduction
An automatic dog feeder relieves a dog parent of the habitual task of refilling their pets' bowls. Due to work and travel, it can sometimes prove to be difficult to keep track of and complete this task on a regular schedule. A simple solution of a self feeder is not a viable action because most dogs cannot be self governed when it comes to how much they eat. Overeating results in gorging sickness, canine obesity, and sometimes death. An automatic smart dog feeder ensures that the dog only gets the amount of nutrition they need throughout the day.
## Design Concept
For a 445 project, it is important to note that the market for indoor automatic dog feeders is saturated with hundreds of brands and models; However, the choices for smart dog feeder for larger outdoor/indoor-outdoor dogs are limited. The project proposed is to fabricate a heavier and robust feeder that will dispense food into a sheltered reciprocal based on users input for parameters such as quantity and frequency. The mechanism of dispensing begins at the reservoir (1) this is above an auger chamber aided by gravity this auger will be driven by a motor into a reciprocal (2). The reciprocal also contains a scale to allow the unit to know how long to run the auger motor based on the user's settings. Once the food is dispensed into the reciprocal the lid is able to open when the RFID tag is in proximity.
## Specifications of design
- Scheduled feeding times and amount. (3)
- Active weighing to monitor pet's eating habits; While also not allowing continued dispensing resulting in overfill.
- RFID proximity access to only permit the pet to eat from reciprocal.
- Solar powered with internal battery bank
- User notifying system for low feed reservoir or low/loss of power (3)
- Tracking feeding paterns to alert owner of illness or loss of appetite (3)

- 2.4 GHz transceiver (4)
- Digital scale signal (9)
- Voltmeter for charge state of battery (8)
- RFID digital signal (7)
- 2.4 GHz transceiver (4)
- auger motor (5)
- reciprocal lid motor (6)

## Footnotes
- (1) Sheetmetal container formed into a box/silo that holds 50-60 lbs of dog food
- (2) The reciprocal is sheltered and protected by a hinged and motor driven lid.
- (3) An app for android or a raspberry pi application for user to unit communication
- (4) MKW41Z for Bluetooth low energy app communication
- (5) Servo motor dynamic loads
- (6) Stepper motor for holding torque
- (7) Grove - 125KHz RFID Reader
- (8) two resistors
- (9) Ardest A/D Converter Weighing Sensor HX711 Balance Module for Load Cell MCU AVR Arduino

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.


- Product: [](url)

- Datasheet: [](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.


- Metal Gear Motors: [](url)

- L9110H H-Bridge Motor Driver: [](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.


- Lithium Polymer Ion Battery: [](url)

- USB Lithium Polymer Ion Charger: [](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

Project Videos