Tag: arduino

I built a head-mounted LiDAR array that lets you see the world like a dolphin via vibrations sent through your jaw.

Posted on By Andrew Thaler 5 Comments on I built a head-mounted LiDAR array that lets you see the world like a dolphin via vibrations sent through your jaw.
Education, Open Science, Science

I’m Andrew Thaler and I build weird things.

Last month, while traveling to Kuching for Make for the Planet Borneo, I had an idea for the next strange ocean education project: what if we could use bone-conducting headphones to “see” the world like a dolphin might through echolocation?

The author wearing a head mounted LiDAR array, looking very pensive.
Spoilers: You can. Photo by A. Freitag.

Bone-conducting headphones use speakers or tiny motors to send vibrations directly into the bone of you skull. This works surprisingly well for listening to music or amplifying voices without obstructing the ear. The first time you try it, it’s an odd experience. Though you hear the sound just fine, it doesn’t feel like it’s coming through your ears. Bone conduction has been used for a while now in hearing aids as well as military- and industrial-grade communications systems, but the tech has recently cropped up in sports headphones for people who want to listen to music and podcasts on a run without tuning out the rest of the world. Rather than anchoring to the skull, the sports headphones sit just in front of the ear, where your lower jaw meets your skull.

This is not entirely unlike how dolphins (and at least 65 species of toothed whales) detect sound. 

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Arduino Project Log: Building the Sea Leveler Part 1 – Hardware

Posted on By Andrew Thaler
The Open CTD Project

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The Sea Leveler.
The Sea Leveler.

Two weeks ago, I announced my latest Hacking the Ocean project, an open-source, Arduino-powered water level meter that monitors the frequency of tweets containing the hashtag #sealevelrise. Since launch, the Sea Leveler has had some bugs and received some good press.  Now that I’ve had some time to monitor its performance and work the bugs out of its code, it is finally time for the promised “how to build the Sea Leveler” post.

This project was much more involved than my Arduino build and significantly more rewarding. The Sea Leveler was a challenge on multiple fronts, from learning to make the Arduino talk to twitter to physically modifying the water level meter. As I noted in my first project log, I have very little programming experience, and the major goal of this build was to level up my C++ skills. I’m very happy with the results, both technical and aesthetic.

For simplicity, I’m going to break this into two posts, one for hardware and one for software.

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Meet Sea Leveler: the open source water level gauge that wants you to talk about #sealevelrise

Posted on By Andrew Thaler 2 Comments on Meet Sea Leveler: the open source water level gauge that wants you to talk about #sealevelrise
Science

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The Sea Leveler, an open source water level gauge that measures activity on twitter.
The Sea Leveler, an open source, arduino-powered, water level gauge that measures activity on twitter.

Two weeks ago, a machine was left on the “free” table at my lab that surprised me–a beautiful stainless steel mechanical water level gauge, on of those old ones with a flywheel in the back that drives the mechanism. Seeing this made me realize that there must be thousands of old scientific devices rusting away in laboratories across the country, obsolete but too well-build to just be thrown out. Then, I thought, there must be some way to take these old tools, some of them elegant, hand crafted works of industrial art, and give them a second life. For Science Online Oceans, I proposed a section on “Hacking the Ocean” developing low-cost, DIY instrumentation to make oceanography accessible to a broader community, but could that work the other way? Can we harness that same maker mentality to take abandoned scientific instrumentation and turn them into tools for education and outreach, or create art through instrumentation?

So I built the Sea Leveler.

http://www.youtube.com/watch?v=UI6p5QxTDEU

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Arduino Project Log: Getting Started with a Digital Compass

Posted on By Andrew Thaler 2 Comments on Arduino Project Log: Getting Started with a Digital Compass
The Open CTD Project

Andrew ThumbAs I mentioned during the last Blue Pints episode, this year I’m going to be attempting to build a low-cost open source CTD for basic oceanographic measurements. This is in addition to my ongoing work with the OpenROV. I have a pretty solid electronics background, but in order to accomplish this goal, I also need to learn how to program microcontrollers, something that I’ve never done before. For the next several months I’m going to tackle various small Arduino project to get comfortable with the fundamentals. I’ll be working out of Environmental Monitoring with Arduino: Building Simple Devices to Collect Data About the World Around Us and Arduino Projects to Save the World, both of which feature beginner to advanced projects based around environmental monitoring and data collection, as well as Programming Arduino Getting Started with Sketches for as a basic programming primer.

For my first project, I wanted to start with something that could eventually be implemented with the OpenROV–a magnetometer to provide compass headings while navigating the robot. As a first step, I wanted to learn how to program the Arduino board to calculate compass headings from a magnetometer and develop some sort of rough visual readout of that heading.

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