1. Project Ambulare Junran Chen, Linh Tran, Branden Youssef
ECE 445 Group 68

2. Introduction
Nowadays, Virtual Reality has become increasingly popular among users in different industries
But for most VR design, the movement of the user(character) requires controller to make it applicable.

3. Introduction VR walking device! What we want to do? We want to make a
Replace the controller by stepping with different speed and facing direction to move around.

4. Features
Provide user an affordable device that can imitate the actual “walking experience” in a VR world without needing a spacious area.
Easy to set up and disassemble

5. System Overview Power System Control and Sensing System
Battery, voltage regulator
Control and Sensing System
EMG Sensors, LSM9DS1 IMU chip and Microcontroller Arduino Tian
Software System
Unreal Engine 4

6. Block Diagram
Power System
Software System
Control and Sensing System

7. Voltage Regulator Reason Why we need it:
1. Deisgned to automatically maintained a constant voltage output level

8. Voltage Regulator

9. Voltage Regulator (1) For 9V output, R1 = 240 Ώ, R2 = 1500 Ώ:
= 6.25, 1.25V * 7.25 = 9.06 V;
(2) For 3.7V output, R1 = 240 Ώ, R2 = 470 Ώ;
= 1.96, 1.25V * 2.96 = 3.7 V;
(3) For 2.7V output, R1 = 240 Ώ, R2 = 279Ώ;
= , 1.25V * = V;

10. Voltage Regulator

11. EMG Sensor Circuit
Measure electrical activity of muscle group (tibialis anterior)
Amplify and filter

15. IMU Sensor - LSM9DS1 Reason Why we need it:
1. Collect the information to help us identify the orientation of the user
Features of LSM9DS1:
This IMU chip includes three types of sensors: (1)accelerometer, (2)gyroscope, and (3)magnetometer.

16. IMU Sensor - LSM9DS1

17. Microcontroller Reason Why we need it:
1. Collect data signal from IMU and EMG sensors
2. Send the data to PC through Wi-Fi

18. Microcontroller

20. Microcontroller and IMU

21. Microcontroller
and IMU

22. Software Translating measured data into VR programs
Using Unreal Engine 4 platform

23. Software

24. Software

26. Thank you!