There was a time when having a blinking blue LED on a project was all you needed to be one of the cool kids. But now you need something more complex. LEDs should not just snap on, they should fade in and out. And blinking? Today’s hotness is breathing LEDs. If that’s the kind of project you want, you should check out [jandelgado’s] jled library.
At first glance, an Arduino library for LED control might seem superfluous, but if you are interested in nice effects, the coding for them can be a bit onerous. If you don’t mind stopping everything while you fade an LED on (or off) then sure, you just write a loop and it is a few lines of code. But if you want to have it happen while other things continue to execute, it is a little different. The library makes it very simple and it is also nicely documented.
Continue reading “Simplifying Basic LED Effects”
The WS2812 is an amazing piece of technology. 30 years ago, high brightness LEDs didn’t even exist yet. Now, you can score RGB LEDs that even take all the hard work out of controlling and addressing them! But as ever, we can do better.
Riffing on the ever popular Adafruit NeoPixel library, [Harm] created the WS2812FX library. The library has a whole laundry list of effects to run on your blinkenlights – from the exciting Hyper Sparkle to the calming Breathe inspired by Apple devices. The fantastic thing about this library is that it can greatly shorten development time of your garden-variety blinkables – hook up your WS2812s, pick your effect, and you’re done.
[Harm]’s gone and done the hard yards, porting this to a bevy of platforms – testing it on the Arduino Nano, Uno, Micro and ESP8266. As a proof of concept, they’ve also put together a great demonstration of the software – building some cute and stylish Christmas decorations from wood, aluminium, and hacked up Christmas light housings. Combining it with an ESP8266 & an app, the effects can be controlled from a smartphone over WiFi. The assembly video on YouTube shows the build process, using screws and nails to create an attractive frame using aluminium sheet.
This project is a great example of how libraries and modern hardware allow us to stand on the shoulders of giants. It’s quicker than ever to build amazingly capable projects with more LEDs than ever. Over the years we’ve seen plenty great WS2812 projects, like this sunrise alarm clock or this portable rave staff.
As always, blink hard, or go home. Video after the break.
Continue reading “More Blinky = More Better – The WS2812FX Library”
We’re still not sure exactly how [connornishijima]’s motion detector works, though many readers offered plausible explanations in the comments the last time we covered it. It works well enough, though, and he’s gone and doubled down on the Arduino way and bundled it up nicely into a library.
In the previous article we covered [connor] demonstrating the motion detector. Something about the way the ADC circuit for the Arduino is wired up makes it work. The least likely theory so far involves life force, or more specifically, the Force… from Star Wars. The most likely theories are arguing between capacitance and electrostatic charge.
Either way, it was reliable enough a phenomenon that he put the promised time in and wrote a library. There’s even documentation on the GitHub. To initialize the library simply tell it which analog pin is hooked up, what the local AC frequency is (so its noise can be filtered out), and a final value that tells the Arduino how long to average values before reporting an event.
It seems to work well and might be fun to play with or wow the younger hackers in your life with your wizarding magics.
When was the last time you went to a library? If it’s been more than a couple of years, the library is probably a very different place than you remember. Public libraries pride themselves on keeping up with changing technology, especially technology that benefits the communities they serve. No matter your age or your interests, libraries are a great resource for learning new skills, doing research, or getting help with just about any task. After all, library science is about gathering together all of human knowledge and indexing it for easy lookup.
It doesn’t matter if you’re not a researcher or a student. Libraries exist to serve everyone in a class-free environment. In recent years, patrons have started looking to libraries to get their piece of the burgeoning DIY culture. They want to learn to make their lives better. Public libraries have stepped up to meet this need by adding new materials to their collections, building makerspaces, and starting tool libraries. And this is in addition to ever-growing collections of electronic resources. Somehow, they manage to do all of this with increasingly strained budgets.
The purpose of this article is to explore the ways that libraries of all stripes can be a valuable resource to our readers. From the public library system to the sprawling academic libraries on college campuses, there is something for hackers and makers at all levels.
Continue reading “You’re Overdue for a Visit to the Library”
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”
Evil geniuses usually have the help of some anonymous henchmen or other accomplices, but for the rest of us these resources are usually out of reach. [Evan], on the other hand, is on his way to a helpful army of minions that will do his bidding: he recently built a USB-powered minion that turns a regular PS/2 mouse and keyboard into a Bluetooth mouse and keyboard.
[Evan] found his minion at a McDonald’s and took out essentially everything inside of it, using the minion as a case for all of the interesting bits. First he scavenged a PS/2 port from an old motherboard. An Arduino Nano is wired to an HC-05 Bluetooth chip to translate the signals from the PS/2 peripherals into Bluetooth. The HC-05 chip is a cheaper alternative to most other Bluetooth chips at around $3 vs. $40 for more traditional ones. The programming here is worth mentioning: [Evan] wrote a non-interrupt based and non-blocking PS/2 library for the Arduino that he open sourced which is the real jewel of this project.
Once all the wiring and programming is done [Evan] can turn essentially any old keyboard and mouse into something that’ll work on any modern device. He also put an NFC tag into the minion’s head so that all he has to do to connect the keyboard and mouse is to swipe his tablet or phone past the minion.
If you’re looking for an interesting case for your next project, this McDonald’s Minion toy seems to be pretty popular. PS/2 keyboards are apparently still everywhere, too, despite their obsolescence due to USB. But there are lots of other ways to get more use out of those, too.
Continue reading “Minions Turn Your Keyboard into a Bluetooth Keyboard”
Textfiles.com is the largest repository of BBS archives and digital writings in the world, and admin [Jason Scott] has a nearly single-minded devotion to saving the documents of and relating to our electronic age. Now, he’s in a bit of a pickle. He found 25,000 manuals for all kinds of electronic items. The collection goes back to the 30s, [Jason] wants to save them, and the current owner of the collection needs the space. Have you ever noticed how terrible books are to move?
Included in this collection just outside Baltimore, MD are thousands of manuals for various pieces of equipment going back to the 1930s. There are Tektronix manuals, HP manuals, and instructions and schematics for equipment that hasn’t been made in a very, very long time. [Jason] put up a Flickr gallery of the library in all its glory. There’s bound to be some very interesting stuff in there.
Of course the acquisition of tens of thousands of out of print manuals will never go smoothly. [Jason] needs to start emptying out the shelves on Monday. The current plan is to go through all the manuals, remove the duplicates, and shuffle them over to a storage unit about a mile away until they can be dealt with properly. If you’re around Baltimore, or more specifically Finksburg, MD, [Jason] could use a few hands to clear out this archive on Monday.