No laser cutting this week, we’re still waiting on repairs. The space will still be open from 7:30-10:30 so come hack!
Are you interested in programming and software but have never known where to begin? Some of our most popular classes have been our
introductory programming ones, and I’ll be teaching one this Saturday. The idea is to give students a gentle introduction to software concepts using Python, a very widely-used but accessible language, and practical examples.
I don’t assume any prior programming experience: I’ll teach you everything you need to know to get started. Come and join us!
The Spikenzie Labs Solder:Time Desk Clock is a fun through-hole kit to solder together. It includes a snap-together lasercut acrylic case with a really nice red tinted screen that increases the contrast on the 20×7 red LED matrix. Plus it is totally hackable with quite a few unused pins available for expansion (like Holly’s sunrise alarm clock).
Given a set of points, the Voronoi tessellation creates a set of convex polygons that each contain one point. They can also be used to randomly generate unique art pieces that cast shifting, lace-like shadows. This one was really quite beautiful until the candle burned through…
Read on for some scripts to make your own and tips for laser cutting them.
It is a truth, universally acknowledged, that an engineer in possession of an antique computer must be in want of hacking it. Last year I reverse engineered the Easter Egg photographs from a Mac SE that I found on the side of the road and that machine has been sitting idle since then, so I took inspiration from NYCR founder Dave Clausen’s six year old 24th anniversary Mac project and turned my old SE into a “30th anniversary Macintosh” with a new ARM motherboard running Linux. Unlike Dave, I was able to interface with the original 9″ CRT thanks to the programmable hardware in the Beaglebone Black.
The CRT was still in good shape and the m68k motherboard would startup (although we have no media or OS for it) so it was fairly easy to reverse engineer the pinout and waveforms for the combination power-supply and video connector. The all-in-one Macs shared a common power-supply for the monitor, analog board, motherboard and drives, so the same cable carries video, hsync, vsync, +5, -5, +12 and -12 Volts.
With these timing measurements I was able to write a software video card that runs inside the BeagleBone Black’s PRU to display a user-space framebuffer, and then used Xvfb to render X11 into a shared memory buffer that could be exported to the PRU’s memory. Working with a bare CRT like this can be scary — the monitor is not even remotely multisync and vsync a few percent off from its desired 60.1 Hz refresh rate generates very bad buzzing sounds.
You can enjoy the dithered 1-bit cat videos above and relive the era with monochrome visuals for xeyes and other classic applications. If you want to build your own and see the specifics of the design, there are more details on my website, trmm.net/Mac-SE_video.
UPDATE 2014-02-09: Original ADB Keyboard and mouse support is now working. adb2usb source code for a Teensy 2.0.
If you’ve ever been running at night in New York City, you know that it can be dangerous, especially if other people can’t see you. This jacket was my attempt to not get flattened by a bicycle at night. Of course, I could have just bought some plain running lights, but what fun is that? Not only does this jacket have seven awesome flashy modes, but each mode responds to my heart rate!
Since my Garmin heart rate monitor uses the ANT protocol, I could easily intercept the heart rate information for my jacket. I used a Teensy and an ANT transceiver to control two LED strips based on the current mode selection and the current heart rate. The jacket is powered by rechargeable battery packs.
My first run with the jacket was the 2013 New Year’s Eve midnight run in Central Park. Since then, I’ve worn it to a few races and even to a tech talk. The full build out details can be found here.
This weekend at NYC Resistor we are teaching a class on the BlinkyTape. If you’ve been wanting to make a project that incorporates LEDs and custom lighting, then this might just be the class for you! BlinkyTape is one of the easiest ways to make interactive lighting installations, so this is a great class for makers of every level.
Bring your laptop and we’ll teach you how to create your own animations and patterns using your BlinkyTape. A BlinkyTape, usb cable, and power supply will be included in the class fee. Which is amazing!
There are a few seats left so sign up now for this exclusive executive tour of this luxury LED lighting solution!
OMG first post for 2014!
NYC Resistor has been known to occasionally homebrew a beer or two. We have members interested in the topic, and friends in the wider brewing community of NYC. However, since I’ve returned from California, I’ve found myself more and more interested in beer brewing at Resistor. Luckily Travis, a fellow member is also deeply into the homebrew hobby. Together we’ve been spinning up a few different projects over here. There will be some great follow up posts on those other projects I am sure. Read on for more about brewing at NYC Resistor!
What was once cancelled is now uncancelled! Craft night for tomorrow, 12/26/13, is back on. Feel free to show up with your eggnog hangovers!