Color changing clock uses PCB digits

There’s an old saying, that you should do everything at least twice. Once to learn how to do it, and then a second time to do it right. Perhaps [Zweben] would agree, since he wasn’t satisfied with his first Neopixel clock and proceeded to build another one. One lesson learned: soldering 180 tiny solder joints isn’t much fun. This time, [Zweben] set out to make a printed circuit board and redesign the clock to make it easier to assemble.

The clock uses multiple copies of a single circuit board. The board holds Neopixel strips in a 7-segment arrangement. Each board can also hold all of the electronics needed to drive the clock. Only the first board gets the microcontroller and other circuits.

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A Minimalist Weather Clock with a Unique Display

If you’re looking for a home hub to display weather, time, and important family information, the formula is pretty simple: build yet another “magic mirror” project. We’re not complaining — magic mirrors look great. But if all you need is time and weather, this elegant pixel display is something just a little bit different.

Among his many criteria for the perfect hack, [Dominic] lists usefulness, visual appeal, and low cost. We’ll agree that his minimalist weather clock hits all those marks, and with the careful selection of a 16 x 32-pixel RGB display module, [Dominic] ended up giving back to the community by developing an Arduino driver for it. He points out that strips of Neopixels could have been used for the display, but they’d have ended up costing more, so the LED matrix was a sensible choice. A 3D-printed separator grid and a paper diffuser provide the proper pixelated look, and some simple animated icons display the two-day weather forecast. We find the time and temperature numerals a little hard to read, but it’s not bad considering the limited resolution of the display. And the case is a nice bit of woodworking too. Not a bad result for only €43.

We’re intrigued by the P10 LED matrix module [Dominic] used for this one. It might be a good choice for a word clock and weather station, or with his driver, a display for just about anything.

Look Out DotStar, Here Comes Lumenati

Adafruit has long been the undisputed ruler of the smart LED product, with their WS2812B (NeoPixel) and APA102C (DotStar) product lines dominating due to the robust assortment of sizes and form factors, as well as their ease of use. SparkFun Electronics recently announced Lumenati, their new line of APA102C breakouts that feature some intriguing features which do a good job of distinguishing the two lines.

First, the screen-printing on the boards include pixel numbers. We were working on NeoPixel assemblies the other day and keeping track of pixels was a nightmare. In addition, the Lumenati boards are meant to combine into larger creations, allowing you to make complicated shapes. SparkFun supports this by giving the boards castellated headers — far better than the solder pads! If you are running into logic conflicts with the boards you can solder in jumpers to bypass the data connections and control individual boards separately. On the down side, SparkFun’s intitial offerings — 6 products — still can’t compete with Adafruit’s, like their 255-LED disk, shields, strips, matrices, and flexible PCBs.

We’ve published a few DotStar builds over the years, like this violin bow lightsaber and the Magicshifter POV stick. Maybe we’ll start seeing some Lumenati builds? Continue reading “Look Out DotStar, Here Comes Lumenati”

A Solar Freakin’ Walkway

Looking to add a little pizzazz to your back garden? Are those strings of lights hung in the trees looking a little dated? Why not try lighting your garden path with DIY solar-powered pavers?

If [jfarro]’s project looks like a miniature version of the much-touted solar freakin’ roadways concept, rest assured that there are huge differences. For one, these lighted pavers actually work — trust me on this; I live not far from the demo site for the Solar Roadways and the degree to which it underwhelms cannot be overstated. Granted, a garden path is a lot simpler to engineer than a road, but many of the challenges remain.

Using recycled glass blocks that are usually reserved for walls and windows, [jfarro] figured out how to attach Neopixel rings to the underside and waterproof them with a silicone conformal coating. The 12 lighted pavers he built draw considerable current, so a 45-watt solar array with charge controller and battery were installed to power the pavers. An Arduino and a motion sensor control the light show when someone approaches; more complicated programs are planned.

Hats off the [jfarro] for taking on a project like this. We don’t often see builds where electrical engineering meets civil engineering, and even on a small scale, dealing with dirt, stone, and water presents quite a few challenges. Here’s hoping his project lasts longer than the Solar Roadways project did.

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We Are Now At DEFCON 2

If you had a working DEFCON meter that reported on real data, would it be cool or distressing?

Before we get ahead of ourselves: no, not that DEF CON. Instructables user [ArthurGuy] is a fan of the 1983 movie  War Games, and following a recent viewing –hacker senses a-tingling — he set to work building his own real-time display.

Making use of some spare wood, [ArthurGuy] glued and nailed together a 10x10x50cm box for the sign. Having been painted white already at some point, the paint brilliantly acted as a reflector for the lights inside each section. The five DEF CON level panels were cut from 3mm pieces of coloured acrylic with the numbers slapped on after a bit of work from a vinyl cutter.

Deviating from a proper, screen-accurate replica, [ArthurGuy] cheated a little and used WS2812 NeoPixel LED strips — 12 per level — and used a Particle Photon to control them. A quick bit of code polls the MI5 terrorism RSS feed and displays its current level — sadly, it’s currently at DEFCON 2.

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Hackaday Prize Entry: ESPMetric, a Simple and Easy Matrix

There’s a lot you can do with a bunch of LEDs connected to the Internet. You can display the time, the weather, the bus schedule, or any one of a number of important data points in your life. Custom matrices are a pain in the butt to set up, which is why we like to see one looking rather polished and clean. [Faire-soi-meme] prettied up an 8×32 NeoPixel matrix with some diffusers and a grid bezel. It’s the ESPMetric, and it’s also an entry for this year’s Hackaday Prize.

The NeoPixel matrix is controlled by a NodeMcu using elements from [squix78]’s ESP82666 weather station code as well as Adafruit’s NeoMatrix library. There is a photoresistor to control brightness as well as 3 buttons to control its various modes. Tapping the buttons brings you by various settings like the time, WiFi status, stock market, and so on.

If you parlez-vous français–or enjoy the Google Translate experience–[Faire-soi-meme] has detailed the build steps on his blog, though you can also download his code from his GitHub repository. There’s a great video of this build, you can check that out below.

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Spice Up Your Bench With 3D Printed Dancing Springs

Not all projects are made equal. Some are designed to solve a problem while others are just for fun. Entering the ranks of the most useless machines is a project by [Vladimir Mariano] who created the 3D Printed Dancing Springs. It is a step up from 3D printing a custom slinky and will make a fine edition to any maker bench.

The project uses 3D printed coils made of transparent material that is mounted atop geared platforms and attached to a fixed frame. The gears are driven by a servo motor. The motor rotates the gears and the result is a distortion in the spring. This distortion is what the dancing is all about. To add to the effect, [Vladimir Mariano] uses RGB LEDs controlled by an ATmega32u4.

You can’t dance without music. So [Vladimir] added a MEMs microphone to pick up noise levels which are used to control the servo and lights. The code, STL files and build instructions are available on the website for you to follow along. If lights and sound are your things, you must check out the LED Illuminated Isomorphic Keyboard from the past. Continue reading “Spice Up Your Bench With 3D Printed Dancing Springs”