1. myDAQ Biomedical Instrumentation Board
Group May1212
Jeremy Bruecken, Kossi Sessou, Alex Weiss
Mani Mina - Advisor
Andrew Watchorn - Client

2. National Instruments myDAQ
Project
Plan
National Instruments myDAQ
Low cost portable data acquisition unit
Interfaces with NI LabView software
Allows students to generate, measure, and analyze signals in real time

3. Project
Plan
myDAQ Details

4. Project
Plan
Problem Statement
National Instruments would like an add-on board to the myDAQ that will directly compete with the BioPac at a 40x price margin
The board should provide the necessary connections and LabView interface to allow for measurements done in an introductory Biomedical Engineering course at Iowa State University

5. Market Survey BioPac currently sole competitor in market
Project
Plan
Market Survey
BioPac currently sole competitor in market
Iowa State recently purchased BioPac kits for introductory class
Our product would be a simple unique solution

6. Functional Requirements
Design
Functional Requirements
Gain and filter signal from contact patches for EKG and EMG to the myDAQ analog input
Provide user interface for sending, receiving, and analyzing signals in LabView via myDAQ
Protect end user per IEC regulations

7. Non-Functional Requirements
Design
Non-Functional Requirements
Simple plug and play hardware interface
Provide user friendly software interface in LabView
40x lower price than BioPac
Allow for cheap and reliable manufacture

8. Design
Concept Sketch

9. Filtering Methods Initial design included numerous hardware components
Removed amplifier and passive elements and replaced with software filtering
Lowers cost of product

10. EKG & EMG Safety IEC compliant Simple and effective
Design
EKG & EMG Safety
IEC compliant
Simple and effective
System is protected from large voltage spikes

11. Burr-Brown INA121Application Note
Design
EKG & EMG Measurement
Burr-Brown INA121Application Note

12. Hardware Built circuit with passive components to verify System Design
Used external Oscilloscope to verify output

13. Hardware Acquired Signal Peaks are present in the acquired signal
Very little filtering is included in this signal

14. LabView Interface Capturing the Signals Writes to file for processing
Implementation
Capturing the Signals
Writes to file for processing

15. Signal Processing and Filtering
Implementation

16. Front End – Acquire and Extract

17. Finished Board High Gain amplifier Easy Connection HPS shunt diodes
No filtering

18. Task Breakdown Jeremy Kossi Alex Complete circuit design
Perform Spice circuit analysis
Hardware
Kossi
Create LabView interface
Performed interface and hardware testing
Alex
Performed hardware testing
Design webpage

19. Things learned Working with client Obtaining proper documentation
Ethics and Proper procedures
Meeting deadlines
Handling design issues

20. Conclusion Digital filtering Vs. Analog Noise issues
How can we build upon this project:
Adding more devices
Adding functionality to program
Increase accuracy

21. Questions? myDAQ System Diagram NI instrumentation learning tool
EKG & EMG
Filter and Gain
Safety
System Diagram