Project

# Title Team Members TA Documents Sponsor
3 Follow-Me Cart: App controlled smart assistant
 Alex Huang
Jiaming Gu
Shi Qiao
 Shengkun Cui other1.pdf
proposal1.pdf
Here's the following of the previous post due to word limitations:

## Subsystem 3: Mobile App
Purpose: Allow customers to control the cart via app.
Features: 1. BLE(bluetooth low energy) pairing with the Raspberry Pi for secure identification.
2. Enable/ disable follow-me mode.
3. adjust the following distance, receive notifications when the cart is too far from the user.
Components: 1. Customized Android app
2. BLE/Wi-Fi for control and ID verification.

## Subsystem 4: Drive Subsystem

Purpose: Drive the car
Components: 1. 12V DC gear motors.
2. Chassis: 2-wheel drive with caster support for balance.
3. Payload capacity: 5–10 kg (scaled for safety and feasibility).
4.Power system: 12V Li-ion battery pack with buck converters for 5V (Pi) and 3.3V (sensors/ESP32).
# Criterion For Success

1. The cart follows the user within 1–2 m, with >90% accuracy in aisle-like environments.
2. Our mobile app should connect to the cart within 5 seconds ,respond to any commands sent by users via app within 2 seconds, allow the user to start/stop at any time and adjust the parameters accordingly.
3. The cart follows only when both the paired phone and marker/ID are detected, preventing false tracking.
4. The cart stops for obstacles >10 cm wide within 1 m.
5. The cart might be able to speed up when it is far from the user and slow down when it gets near. In the whole process it should be able to avoid all possible obstacles smoothly.
6. The cart safely carries 5–10 kg without tipping.
7. Max speed capped at ~1.5 m/s (≈3.3 mph).
8. Operates for at least 1 hour per charge at walking speed (0.5 -- 1.5 m/s).

Laser Harp MIDI Controller with Musical Articulations

Yingxi Hai, Hanze Tu

Laser Harp MIDI Controller with Musical Articulations

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