Formlabs Form 1+ API now available on Github

Since 2014, the Form 1+ has been serving a faithful community of avid resin-oriented 3D printer enthusiasts. With an API now released publicly on Github, it’s time for the Form 1+ to introduce itself to a crew of eager hardware hackers.

Exposing an interface to the printer opens the door to a world of possibilities. With the custom version of PreForm that arrives with this release, a whopping 39 different properties are open for tuning, according to the post on Reddit. Combining these newly-accessible parameters with a sufficient number of hackers, odds are good that the community will be able to quickly converge on stable settings for 3rd party resins. (We’re most excited to see the Homebrew PCBs community start exposing their UV-sensitive PCBs with this hardware setup.)

Heads-up: poking around in this brave new world is almost certain to void your warranty, but if you’re eager to get SpacewΛr up-and-running, it might just be worth it.

Books You Should Read: Instruments Of Amplification

Psst… Wanna make a canning jar diode? A tennis ball triode? How about a semiconductor transistor? Or do you just enjoy sitting back and following along an interesting narrative of something being made, while picking up a wealth of background, tips and sparking all sorts of ideas? In my case I wanted to make a cuprous oxide semiconductor diode and that lead me to H.P. Friedrichs’ wonderful book Instruments of Amplification. It includes such a huge collection of amplifier knowledge and is a delight to read thanks to a narrative style and frequent hands-on experiments.

Friedrichs first authored another very popular book, The Voice of the Crystal, about making crystal radios, and wanted to write a second one. For those not familiar with crystal radios, they’re fun to make radios that are powered solely by the incoming radio waves; there are no batteries. But that also means the volume is low.

Readers of that book suggested a good follow-up would be one about amplifier circuits, to amplify the crystal radio’s volume. However, there were already an abundance of such books. Friedrichs realized the best follow-up would be one on how to make the amplifying components from scratch, the “instruments of amplification”.  It would be unique and in the made-from-scratch spirit of crystal radios. The book, Instruments of Amplification was born.

The Experiments

Microphonic relays
Microphonic relays, via H.P. Friedrichs Homepage

The book includes just the right amount of a history, giving background on what an amplifier is and how they first came in the electrical world. Telegraph operators wanted to send signals over greater and greater distances and the solution was to use the mix of electronics and mechanics found in the telegraph relay. This is the springboard for his first project and narrative: the microphonic relay.

The microphonic relay example shown on the right places a speaker facing a microphone; the speaker is the input with the microphone amplifying the output. He uses a carbon microphone salvaged from an old telephone headset, housing everything in an enclosure of copper pipe caps, steel bar stock, nuts and bolts mounted on an elegant looking wood base. All the projects are made with simple parts, with care, and they end up looking great.

Continue reading “Books You Should Read: Instruments Of Amplification”

Bunnie and EFF Sue US Government over DMCA 1201

This morning Bunnie Huang wrote about his reasons for suing the US Government over Section 1201 of the Digital Millennium Copyright Act (DMCA).

The DMCA was enacted in 1996 and put in place far-reaching protections for copyright owners. Many, myself included, think these protections became far-overreaching. The DMCA, specifically section 1201 of the act which is known as the anti-circumvention provision, prohibits any action that goes around mechanisms designed to protect copyrighted material. So much has changed since ’96 — software is now in every device and that means section 1201 extends to almost all electronics sold today.

So protecting copyright is good, right? If that were the only way section 1201 was enforced that might be true. But common sense seems to have gone out the window on this one.

If you legally purchase media which is protected with DRM it is illegal for you to change the format of that media. Ripping your DVD to a digital file to view on your phone while on the plane (something usually seen as fair use) is a violation. Want to build an add-on for you home automation system but need to reverse engineer the communications protocol first? That’s a violation. Perhaps the most alarming violation: if you discover a security vulnerability in an existing system and report it, you can be sued under DMCA 1201 for doing so.

Cory Doctorow gave a great talk at DEF CON last year about the Electronic Frontier Foundation’s renewed push against DMCA 1201. The EFF is backing Bunnie on this lawsuit. Their tack argues both that section 1201 is stiffling innovation and discouraging meaningful security research.

If it’s illegal to write about, talk about, or even privately explore how electronics are built (and the ecosystem that lets them function) it’s hard to really master creating new technology. A successful lawsuit must show harm. Bunnie’s company, Alphamax LLC, is developing hardware that can add an overlay to an HDMI signal (which sounds like the continuation of the hack we saw from him a few years ago). But HDCP would prevent this.

Innovation aside, the security research angle is a huge reason for this law (or the enforcement of it) to change. The other plaintiff named in the suit, Matthew Green, had to seek an exemption from the DMCA in order to conduct his research without fear of prosecution. Currently there is a huge disincentive to report or even look for security vulnerabilities, and that is a disservice to all. Beneficial security research and responsible disclosure need to be the top priority in our society which is now totally dependent on an electronically augmented lifestyle.

Ever Buy Music From Apple? Use Linux? You Need This Tool

Sure, you’re a hardcore superuser, but that doesn’t mean you don’t enjoy the finer things in life — like shiny squircles and getting every new app first. But, what’s an OS-indiscriminate person like yourself going to do when it comes time to purchase music? That’s where the recover_itunes tool shines, and if you’re a Linux user with an iPhone, it might just be your new best friend.

Continue reading “Ever Buy Music From Apple? Use Linux? You Need This Tool”

MicroPython on the ESP8266: Kicking the Tires

Scripting languages are for large computers, right? “Real” embedded device work is a hellish, never-ending cycle of code, compile, and re-flash. Well, I used to think so too, but with the proliferation of scripting and other interactive languages to microcontrollers over the last few years, the hurdle to interactive development on the small chips has gotten a lot lower.

On the ESP8266 platform, I’ve tried out NodeMCU’s Lua and ESP8266 BASIC. (For the last half-year, I’ve been using the awesome Mecrisp-Stellaris almost exclusively on the STM32F1xx and F4xx chips, but haven’t dipped into ESP8266 Forth yet.)

NodeMCU is great because it’s got everything you could want built in, and through cloud services it’s easy to get a tailored build made that maximizes free flash memory for your projects. I just don’t dig the asynchronous Lua thing (you might, try it!). ESP BASIC has a different set of libraries, and is missing MQTT for my purposes. Still it’s pretty slick, and worth a look.

So when the MicroPython folks announced that they were releasing the binary builds for the ESP, I thought it was time to give it a spin. I’ve used Python for nearly twelve years now, so it’s like a comfortable shoe for me. Would MicroPython be the same on the ESP8266? The short answer is yes and no.

Continue reading “MicroPython on the ESP8266: Kicking the Tires”

Robomintoner Badminton Bot To Defeat Amateur Humans

Watching robots doing sports is pretty impressive from a technical viewpoint, although we secretly smile when we compare these robots’ humble attempts to our own motoric skills. Now, a new robot named Robomintoner seeks to challenge human players, and it’s already darn good at badminton.

Continue reading “Robomintoner Badminton Bot To Defeat Amateur Humans”

Simple Clock is Great Stepper Motor Project

You’d think that we’ve posted every possible clock here at Hackaday. It turns out that we haven’t. But we have seen enough that we’ve started to categorize clock builds in our minds. There are the accuracy clocks which strive to get every microsecond just right, the bizzaro clocks that aim for most unique mechanism, and then there are “hello world” clocks that make a great introduction to building stuff.

Today, we’re looking at a nice “hello world” clock. [electronics for everyone]’s build uses a stepper motor and a large labelled wheel that rotates relative to a fixed pointer. Roll the wheel, and the time changes. It looks tidy, it’s cyclical by design, and it’s a no-stress way to get your feet wet driving stepper motors. And it comes with a video, embedded below.

Continue reading “Simple Clock is Great Stepper Motor Project”