These are from Etsy seller ikymagoo, who also has red and yellow versions. They seem a bit pricey to me at $200 a set, but it also seems like an easy re-make. There’s video here showing that shows more detail, including the binding posts on the back. Some info on a similar build is available in this thread at the DIY Audio Projects Forum
We’ve covered plasma speakers before, and these vids don’t really add much in the way of additional info, they’re just different variations on the theme — a theme I find endlessly fascinating. The top vid is by way of TechEBlog, the second is from John Warren (via Adafuit). Check out his blog post below for […]
Last year, artist Kyle McDonald was trying to figure out ways to get high-frequency analog signals out of his computer, and noticed that nice VGA connector on the side of the computer.
Darrel of Fort Collins, CO, wrote in with his demo of an Android app that controls servos via audio. This is a demo of an android app that directly controls servos via a special audio tone from your android phone. No micro-controller or electronic components of any kind are needed aside from a battery. If […]
A while back Schenectady Museum curator Chris Hunter came across some old pallophotophone recordings from radio station WGY. “What’s a pallophotophone?”, you might ask. Also known as the RCA Photophone, it’s an early recording device developed by GE researcher Charles Hoxie. GE Engineer Russ DeMuth, recreates a pallophotophone from Hoxie’s original design and manages to extract some rather interesting recordings.
Josh Rosenstock brought his Nomadic Remix jacket and other projects to the recent Cambridge Mini Maker Faire. His jackets work by recording ambient audio from your surroundings and then chopping the sound up and playing it back through speakers sewn into the collar. You can control the recordings and remixing through sensors on the garment. For more info on josh’s amazing projects, visit his site.
Gio, a MAKE subscriber from Winnipeg, Canada, sent us a link to this well-documented low voltage headphone amp project. The tube-based amp uses a single 12AU7 tube for voltage gain and a IRF510 MOSFET to supply current to drive the ‘phones. The small hybrid amplifier operates off a 12V SLA (sealed lead-acid) battery, so there […]
