CEPD News 
June, 2012 - Vol 5, Issue 2


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Society News
Two Dimensional Data
CEPD in the Community
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Society News

The IEEE Signal Processing Society Presents
An Introduction to Compressive Sensing  and its Applications by Michael Wakin, Ph.D., Colorado School of Mines
When: June26th, 2012  06:00PM-08:30PM


Location: Boulder Beer, 2880 Wilderness Place,
                Boulder, CO 


Note: 6:00 PM - 7:00 PM is reserved for snacks and networking.


Please see the SPS Events page to register for this meeting.

QR Codes

What are these things that show up everywhere?

These are known a QR (Quick Response) codes. Originally invented by Toyota Denso Wave as a 2-D barcode for inventory tracking, this barcode format continues to evolve and expand as pattern density increases, thus allowing for more information to be stored. Information can be stored in numeric, alpha-numeric, binary, and Kanji. There are smart phone apps that can read these codes and automatically decode them or redirect you to a website for additional product information. The general structure of the encoding is shown here. The amount of information can be stored in a version 1, 2, 3, 4, 10, or 40 format, with increasing capacity with each version.


The data is encoded using the Reed-Solomon error correction algorithm with four error correction levels, with approximately 7-30% error detection/recovery depending on the level. Naturally, greater error correction capability yields lower data capacity. The use of QR Codes is free of any license and is clearly defined and published as an ISO standard. Denso Wave owns the patent rights on QR Codes, but has chosen not to exercise them.


So, you may ask how to make your own custom QR codes? Easy. Try one of these handy links:

http://qrcode.kaywa.com/ , http://goo.gl/ I prefer the Kaywa site, since it does not redirect you through the all-mighty Google first.


Be careful reading these, though, if you are not sure of the source. Malicious QR Codes combined with a permissive reader can put a computer or phone's contents and user's privacy at risk. This practice is known as "attagging". For example, the QR code can lead you to a site containing malicious software. Apparently, in Russia, a malicious QR Code caused phones that scanned it to send premium texts at a fee of USD $6 each. Ouch. If you want to go to a safe link, try the QR code in this article!


Special thanks to http://en.wikipedia.org/wiki/QR_Code for the information contained in article. -CC


CEPD in the Community

Dave Farrell presented a hands-on workshop on digital thermometers to middle school students at Bruce Guadalupe Community School. BGCS is a charter school in Milwaukee where his daughter, Laura, teaches science.  It was part of their weather program, but it is no surprise that Dave used the opportunity to plug electrical engineering.  The students measured temperatures in Celsius and Fahrenheit with electronic thermometers they built themselves.


dig therm BGCS


If you would like help developing a new product or if you find your project understaffed, CEPD can help you meet your deadlines. Our staff draws on years of diverse product design experience to provide creative and timely solutions for your product needs. Some of our specialties include:
  • DSP
  • Embedded Systems Hardware and Software
  • Data Acquisition
  • Wireless Sensor and Telemetry Systems (Zigbee, Cellular, VHF, Bluetooth, ANT+, etc.)
  • Control Systems
  • Programmable Logic: FPGA / CPLD / EPLD
  • Analog Circuit Design
  • Switching Power Supply Design
  • Battery charging (all chemistries)
  • PCB Design and Layout
  • Analysis and Documentation
Our goal is to provide cost effective and expedient design options for our clients. Our services range from an hour of consultation to large turn-key product development projects. We provide detailed proposals, accurate estimates and time schedules to help you manage each phase of the project. We can offer fixed cost or time and materials proposals to suit your specific needs. There is no cost to you for the initial proposal we create and the initial discussion required! 

The Staff of CEPD, Inc.
2012, CEPD, Inc.             
 303 415-1112    Fax 720 306-4445