Voltage Regulators: An Introduction

We finish off our Introduction to Electronic Components series with the voltage regulator, which is a useful little thing. Sometimes, you have more voltage than you need—say, when you’re working with a 9 volt battery but you need 5 volts for your circuit. Also, if your project is especially finicky, they can also take in a fluctuating amount of voltage and emit a perfectly constant value.

If you’re looking for more about other components (say…diodes, buttons and switches, resistors, etc etc) check out the whole playlist!

 

Advertisements

Visual Microphones: The Future is Now

The minutest movements of plant leaves. A glass of water: deceptively still. A bag of chips, lying discarded on the table. One of these things may be slightly less poetic than the others, but they do have one thing in common: scientists from MIT can recover sound from all three.

Calling it “the Visual Microphone” a team of researchers are using visual data to recover sound from videos of everyday objects. These objects are seemingly still to the naked eye, but upon reviewing the video, researchers were able to pinpoint the modes of vibration of these objects.

From their abstract:

“When sound hits an object, it causes small vibrations of the object’s surface. We show how, using only high-speed video of the object, we can extract those minute vibrations and partially recover the sound that produced them, allowing us to turn everyday objects—a glass of water, a potted plant, a box of tissues, or a bag of chips—into visual microphones.”

Comprised of Abe Davis, Michael Rubinstein, Neal Wadhwa, Gautham Mysore, Fredo Durand and William T. Freeman, the team’s website says they’re working on releasing code and data. But so far, they’ve posted sound samples of their work. Check it out here.

Draw MIDI: A DIY Paper Circuit Project

Update: Alex won first place in NYU Music Technology’s 2014 product design competition!                       Congrats!

 

Today’s Project: Draw MIDI

(Production: Ronny Mraz, Adam November, and Kathleen “Ying-Ying” Zhang, full credits at Youtube)

A digital-based project, Alex Haff’s Draw MIDI uses capacitance sensing to collect electrical signal from a pencil-and-paper keyboard, converts that to MIDI using an Arduino, and then sends the code into your computer via a Max patch. That may sound complicated, but it’s quite simple once you understand the function of each part of the project.

System Requirements and Code

While this project can technically be done on Windows, it takes a bit of finagling. We recommend Mac OSX.

Because Draw MIDI is a digital project, you’ll also need some code. For this project, Alex used both an Arduino sketch and a Max patch. You can find each of them here and here.

The Arduino code will run in the controller’s software on your computer. The Max patch will need to be run in Max. If you don’t own Max, never fear. You can copy and paste the code into Max’s free runtime application.

Step-by-Step

NYU Music Technology is an active member of the Instructables.com community. As such, a step-by-step guide of building the project may be found here.

Edit: Thanks for the feature, Instructables!

We had a lot of fun with this week’s project and hope you will, too! A special thanks to Langdon Crawford for cleaning up and hosting the code.

Draw MIDIPaper Circuits

Paper circuits have been making their way around the tech world because their low-cost components give them great potential for cheap mass production. For DIY, they offer similar affordability, a great availability of materials, and they’re just plain fun. There’s a novelty in creating something interactive from ink and graphite. Usually, our words and drawings can’t fly off the page, but with the addition of electronics they can light up or be heard.

For an industry application of paper circuits, watch our talk with educator Alex Ruthmann.

For some inspiration, check out this Ted Talk, “DJ Decks Made of Paper” by Kate Stone.

And for some great, simple projects the Exploratorium’s Tinkering Studio has you covered.

 

Where Music, Education, and Technology Collide

We at the Science of Music are firmly perched on the intersection between music and technology, but we’re at a few other crossroads as well.

With technology changing the way we look at art (and vice versa) it’s only to be expected that it’s changing the way we look at education. We, in particular, are especially interested in the way technology is reshaping how we think of music education.

A new edition to NYU’s faculty in 2013, Alex Ruthmann also serves as the President of the Association of Technology in Music Education. We’re happy to have him at NYU, and especially happy to talk with him about the future of music education, why people should learn music, and what it means to be both an innovator and an educator. For more from Alex, you can find him on Twitter as @alexruthmann or visit him at his website.

Wah Pedals: A Look “Under the Hood”

Video


Since their invention in 1966, wah pedals have had a prolific history in modern rock music. From Jimi Hendrix’s “Voodoo Child” to David Gilmour in “Echoes” (where it was used backwards). But what goes into a wah pedal? How does it get that distinctive, “cry baby” sound? Let’s get under the hood and find out.

The Science of Music Gets Its Own YouTube Channel!

Video

Hello Blogosphere!

These are your friendly music-to-science emissaries from NYU MARL announcing a new YouTube channel specifically for the Science of Music!

In this video we outline our ongoing mission is to bridge the world of music to engineering, science, and technology. And we also give you a preview for what’s to come, so tune in for a weekly demonstration or explanation from New York University’s Music and Audio Research Laboratory!

DIY: Build Your Own Microphone!

This how-to video explains the process of building a dynamic microphone (which, incidentally, can also be used as a loud speaker) from a cup! This rudimentary audio transducer could be used as a quick project for a physics class exploring electromagnetism or an audio technology class exploring transduction. Or you could do it just for kicks.

The fidelity of the completed project is not studio quality (if it was our lives would be a whole lot cheaper), but it’s cool. And on the upside you don’t have to have an EE degree to build it.

Credits:

  • Written and Directed by Travis Kaufman and Nick Dooley
  • Produced with support from The National Science Foundation