A brief intro to the main ideas behind How Bitcoin Works, including how money is transferred, who keeps track of it, and how the whole thing is secured.
A short introduction to how Bitcoin Works. Written version:http://www.imponderablethings.com/2014/04/how-bitcoin-works-in-5-minutes.html
An iPad app that provides augmented reality steps for building a circuit on a bread board. Graphics are overlayed on the actual breadboard to show you exactly where to put parts, and provide extra information, like values, tolerances, and voltages.
A somewhat technical, but concise explanation of how Bitcoin works.
This video demonstrates the use of solder wick (braid), a solder sucker (desoldering pump), and desoldering gun. It explains why some joints are hard to desolder: large ground planes or components, small holes, low quality pcbs. Finally, some alternative methods are shown, including cutting the leads, pulling one lead out at a time for resistors and other two-legged parts, and heating all the pins at once, using an iron, hot air or ChipQuik.
The 2013 Guthman Musical Instrument Competition featured an array of new instruments that combine electronics, computers and sensors, often building on a base of a traditional acoustic instrument. The $10,000 competition had some prestigious judges this year, including Laurie Anderson, David Wessel, and electronic musician and sound designer Richard Devine.
Some pictures and video of the finalist are in the full blog entry.
Beatjazz Exo-voice Prosthesis by Onyx Ashanti
Onyx Ashanti presented a wearable controller with myriad sensors, including pressure sensors for breath control, accelerometers that track his head and hand motions, and a large array of fsr sensors under his fingers, and even some for his lips. The design was originally modeled off a saxophone interface.
An upclose look at the electronics reveals a smorgasbord of arduinos, wifi interfaces, and 3D printed structures he made with a RepRap. The entire design is open source for anyone to reprint and recreate. He's got a crowd fundraiser going to create a collaborative version of this controller.
The great thing about his controller is that lighting tells the audience what he's doing with all those inputs. You can see when he's exhaling and inhaling to change the sound. He also has a small robot that bends and twists as his changes the parameters (embedded video above). He uses this as a feedback mechanism to watch what he's doing with the accelerometers and other inputs. With over 40 parameters to control, and what looks like an equal number of sensor inputs, keeping track of what does what could be unmanageable. He's developed a number of "latching" schemes that let him navigate the parameter space, locking some in place while he adjusts others, remapping all the inputs on the fly into manageable configurations.
The Rangeinet by Daniel Iglesia
The Rangeinet is based on a 3D scanning kinect and projector that changes sound based on the size and location of objects in front of it. In some modes, it has lines that scan horizontally and vertically, and trigger sounds when they run into an object. The performance involved Dan Inglesia sitting at the machine turning knobs, while two helpers moved music stands, 2x4's and themselves around the stage to change the sound.
Roli Seaboard performed by Heen-Wah Wai
The Roli Seaboard" is a new type of (piano) keyboard with a squishy pad molded in the shape of a traditional piano that responds to continuous pressure input. It can detect the initial strike velocity, and then change pitch if the player pushes the key to the side (tremolo) and change volume as the player adds pressure or releases pressure. The underlying technology is a massive array of FSRs. Unlike many pressure sensitive pads, the squishy rubber gives the player much more control and feedback over the pressure (both vertical and sideways). It has a great feel, and seems like they found a good sweet spot between too stiff and too soft.
Video Sampling from the Competition
There were many other entrants with interesting stuff, too.
- Espongina by Merche Blasco
A water based controller with two containers that each have a piezo. Vibrations in the water are sonified with a computer.
ESPONGINA - Water controller/ FINAL DEMO - Thesis 2 from merche blasco on Vimeo.
- Electrumpet by Hans Leeuw
- The EMvibe by N. Cameron Britt
From his website:
The EMvibe is an acoustic vibraphone augmented with computer-controlled electromagnetic actuators that enable the vibraphone to be “bowed” electromagnetically. The EMvibe allows for enhanced control of the vibraphone’s amplitude envelope and harmonic content and is capable of infinite sustain of up to seven pitches simultaneously.
- Cilia: a flute controller by Bruce Gremo
astlab has made a simple device that turns any USB MIDI device into a wireless (WiFi) device that also speaks OSC. They used a USB WiFi dongle to do the transmission. Their target device is aVMeter.