S16: Mars 1
Contents
Grading Criteria
- How well is Software & Hardware Design described?
- How well can this report be used to reproduce this project?
- Code Quality
- Overall Report Quality:
- Software Block Diagrams
- Hardware Block Diagrams
- Schematic Quality
- Quality of technical challenges and solutions adopted.
Project Title
LED Display of Audio Spectrum
Abstract
We plan to design a LED display system to visualize audio analog signals. The system we designed is capable of display audio frequencies up to 4 kHz. The main goal of our project is to visualize the music through LED matrix board. The music is sampled through an audio amplifier with 50dB. The signals will be converted by integrated ADC module in the LPC1578 microcontroller. And the FFT algorithm is implemented to convert the value from time domain to frequency domain. And all the value in frequency domain will be mapped to LED matrix display through I2C interface. The LED matrix display will light up horizontal and vertical LEDs depend on the audio frequency. The UART is interface is also used for debugging purpose.
Objectives & Introduction
The main objective of the project is to convert audio analog signal from time domain to frequency domain and display the frequency and amplitude using LED matrix.
- 1. The control unit is using LPC1578 SJOne board which perform the Fast Fourier Transform(FFT). It takes input from audio module and uses ADC to convert to digital signals as input of FFT module, it uses I2C bus to write LED matrix board to display.
- 2. The audio input module is Adafruit Electric Microphone Amplifier - MAX9814 with Auto Gain Control; If takes sound/audio as input and filter the noise and pass the analog signal to SJOne board.
- 3. The 8x8 LED matrix is Adafruit Bicolor LED Square Pixel Matrix with I2C Backpack.There is I2C slave chip on board so SJOne board can write the registers to light up the LED to indicate frequency and amplitude.
Team Members & Responsibilities
- Jaswanth Bhimanapalli
- Fast Fourier Transforms(FFT) + I2C
- Sucharitha Sirigireddy
- Fast Fourier Transforms(FFT) + I2C
- Tianran Chen
- LED interfacing + Powerpint Slide
- Wei Liu
- ADC interfacing + Wikipedia update
Schedule
Show a simple table or figures that show your scheduled as planned before you started working on the project. Then in another table column, write down the actual schedule so that readers can see the planned vs. actual goals. The point of the schedule is for readers to assess how to pace themselves if they are doing a similar project.
| Week# | Start Date | End Date | Task | Status | Actual Completion Date |
|---|---|---|---|---|---|
| 1 | 03/07/2016 | 03/13/2016 | Submitted project proposal | Completed | 03/13/2016 |
| 2 | 03/14/2016 | 03/20/2016 | Research on system block diagram | Completed | 03/20/2016 |
| 3 | 03/21/2016 | 03/27/2016 | Study and Design led display of audio spectrum | Completed | 03/27/2016 |
| 4 | 03/28/2016 | 04/03/2016 | Parts Purchase | Completed | 04/06/2016 |
| 5 | 04/04/2016 | 04/10/2016 | Develop program for ADC driver | Completed | 04/18/2016 |
| 6 | 04/11/2016 | 04/17/2016 | Create task for buffering audio spectrum | Completed | 04/18/2016 |
| 7 | 04/18/2016 | 04/24/2016 | Finish coding and simulate software code; | Completed | 04/28/2016 |
| 8 | 04/25/2016 | 05/01/2016 | Initial bring up hardware board | Completed | 05/01/2016 |
| 9 | 05/02/2016 | 05/08/2016 | Initial Testing and debug and fix all hardware issues | Completed | 05/12/2016 |
| 10 | 05/09/2016 | 05/15/2016 | Final Testing and debug and fix all software issues | TBD | |
| 11 | 05/16/2016 | 05/22/2016 | Final Wiki report, Powerpoint, recording video | TBD | |
| 12 | 05/24/2016 | 05/24/2016 | Final Demo Day | TBD |
Parts List & Cost
| Component Name | Quantity | Cost per Item | Total Cost |
|---|---|---|---|
| Audio Amplifier Board | 1 | $7.95 | $7.95 |
| LPC1758 SJOne Board | 1 | $70 | $70 |
| LED Matrix (8 X 8) | 1 | $15.95 | $15.95 |
| Wires | 6 | $0.1 | $0.6 |
| Total | $94.5 |
Design & Implementation
The design section can go over your hardware and software design. Organize this section using sub-sections that go over your design and implementation.
Hardware Design
The hardware system is composed of audio board with sensor and filters, SJOne board based on LPC1758, LED matrix board. The block diagram is shown in below.
As shown in the block diagram, the interface between each module is described below:
1. ADC
2. I2C
3. UART
Hardware Interface
As shown in the block diagram, the hardware interface between major functions are: 1. ADC
Software Design
Show your software design. For example, if you are designing an MP3 Player, show the tasks that you are using, and what they are doing at a high level. Do not show the details of the code. For example, do not show exact code, but you may show psuedocode and fragments of code. Keep in mind that you are showing DESIGN of your software, not the inner workings of it.
Implementation
This section includes implementation, but again, not the details, just the high level. For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.
Testing & Technical Challenges
Describe the challenges of your project. What advise would you give yourself or someone else if your project can be started from scratch again? Make a smooth transition to testing section and described what it took to test your project.
Include sub-sections that list out a problem and solution, such as:
My Issue #1
Discuss the issue and resolution.
Conclusion
Conclude your project here. You can recap your testing and problems. You should address the "so what" part here to indicate what you ultimately learnt from this project. How has this project increased your knowledge?
Project Video
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Project Source Code
References
Acknowledgement
Any acknowledgement that you may wish to provide can be included here.
References Used
List any references used in project.
https://en.wikipedia.org/wiki/Fast_Fourier_transform
https://learn.adafruit.com/fft-fun-with-fourier-transforms/spectrum-analyzer
https://en.wikipedia.org/wiki/Spectrum_analyzer
Appendix
You can list the references you used.
