Hello World

An updated summary can be found here.

——-spring 2015 version———-

Our goal

Bringing (audio) DSPs to the maker community, on (yet another) shield that can interface between existing Arduino shields, a powerful (low power) DSP, and a single-board computer (BeagleBone Black). Being open-source, we hope that such a shield could be customized to support a variety of I/O options.


iPURE, or Idea to Prototype Undergraduate REsearch Award, is a funding program at Georgia Tech for encouraging us undergraduates to have some electronic fun, but we’d rather say, “ enrich our education with research and design experience. We get to take our ideas all the way through to making a working prototype, and we are given access to resources and mentors to help us along the way! We even get academic credit, so its almost like designing a class that we always wanted to take, but couldn’t find in the regular catalog.


Our team has a simple idea: we want to give the maker community access to (yet another) DSP that could help them filter and analyze signals, which might overwhelm the amazing (but simple) Arduino Uno, so makers won’t have to setup links to a bigger computer to do their analyses. Having a sensorShield+DSPcape+singleBoardComputer with such capability could lead to a variety of applications, and we’d like to work on processing sounds and ECGs for this semester!

We are going for an open source design to ensure that instead of having a black box that has been optimized to work at a certain supply voltage, input impedance, and output format, we can bring the open hardware/software community’s modular excitement through, and give the users more control over their sensing systems. Besides, this is a learning experience for us, and we hope to share our journey with you through this blog!

Here’s our first video update – an introduction/sales pitch from the ideation part of this project:

Our goals have changed a bit, though, and we are shooting for a more generic design!

Who we are

Electrical engineers! We have a terrible time dealing with off-the-shelf electronic devices that work magically well. First off, when we hear the 32-bit WAV outputted by a [ $100 ] sound recorder, we almost cry, imagining all the symphony orchestras, rock concerts, roommate reactions, and karaoke nights that we would have recorded in high quality, if only we had spared a hundred dollars a little earlier in our lives. But, given our training in engineering, we have self-assigned ourselves the task of figuring out the genius behind these devices! The figuring out bit is what this blog is about.

We are not trying to reverse engineer the popular recorders on the market, no, but we are trying to understand the signal path underlying such devices. With a sound recorder as an example, we want to learn some more about the “art of electronics”, especially when it comes to capturing sound!

Everything useful that we make / find will be released under an open source license, and we’ll link the content [ here: GitHub coming soon ]!


First set of collaborators on Echo. Update pending.

Disclaimer: The header image is from swag.gatech.edu, and it is not indicative of Georgia Tech’s endorsement of this project. We are just showing some affection for the institute funding our work.

Collage made using [ befunky ]


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