EE445L Embedded Systems Lab with Dr. Valvano
Final Project, 1st place in class design competition
Spring 2021
Team Members: Allen Jiang, Sophia Jiang, Adeel Rehman, Sharon Chen
Features:
- Circuit Board
- Compact 4-Layer design (Board dimensions: 1.94" x 0.90")
- TM4C Microcontroller
- 12-bit DAC and audio amplifier output
- MPU-6500 IMU
- ESP-01S Wifi Module
- Power initiated by button and latched on by MCU - allows for zero vampire power
- USB-C Battery Charging
- Onboard battery protection (overvoltage, undervoltage, short)
- Firmware
- Neopixels driven by Ping-Pong uDMA
- ESP-01S AP-mode for TCP-IP communication with Android app
- Android app for on-the-fly color, blade effect, and audio configuration with voltage and temperature telemetry
- Smoothswing v2 algorithm implementation
- Hardware
- Hilt
- Designed in Fusion 360
- 1" aluminum core hilt
- Holes drilled and tapped for button access, charging port access, and mounting 3D printed parts
- Grooves cut using a milling bit on a drill press
- 3D printed cosmetic attachments are finished through sanding, filler spray coat, and final spray paint coat
- Blade
- Polycarbonate tubing (1" OD, 0.125" walls)
- 2 parallel back-to-back LED strips of 144 pixels/m WS2812B neopixels - up to 15 amps of current
- LEDs diffused using layers of foam and cellophane. Polycarbonate tubing is sanded on the outside.
- 3D printed blade cap using translucent filament
- Blade connector
- Custom designed as two 1" circular 4-layer PCBs
- No latching components - easy and quick connect/disconnect
- Hilt-side connector uses 19 pogo pins to contact with 3 large ring pads on blade-side connector
- Chassis
- Holds electronic internals together for durability and convenience
- 3D printed PLA
- Houses RGB button, PCB, 21700 Li-ion battery, speaker, and hilt-side blade connector
- Blade connector mounted using screws and hot-melt insert
- RGB button connected with ribbon cable
- Hilt
Video Link:
