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Hackaday Links: September 8, 2019

September 8, 2019 by 7 Comments

We start this week with very sad news indeed. You may have heard about the horrific fire on the dive boat Conception off Santa Cruz Island last week, which claimed 33 lives. Sadly, we lost one of our own in the tragedy: Dan Garcia, author of the wildly popular FastLED library. Dan, 46, was an Apple engineer who lived in Berkley; his partner Yulia Krashennaya died with him. Our community owes Dan a lot for the work he put into FastLED over the last seven years, as many an addressable LED is being driven by his code today. Maybe this would be a good chance to build a project that uses FastLED and add a little light to the world, courtesy of Dan.

In happier news, the biggest party of the hardware hacking year is rapidly approaching. That’s right, the 2019 Hackaday Superconference will be upon us before you know it. Rumor has it that there aren’t that many tickets left, and we haven’t even announced the slate of talks yet. That’s likely to clean out the remaining stock pretty darn quickly. Are you seriously prepared to miss this? It seems like a big mistake to us, so why don’t you hop over and secure your spot before you’re crying into your Club-Mate and wondering what all the cool kids will be doing in November.

Of course one of the highlights of Superconference is the announcement of the Hackaday Prize winner. And while we naturally think our Prize is the best contest, that doesn’t mean there aren’t others worth entering. MyMiniFactory, the online 3D-printing community, is currently running a “Design with Arduino” competition that should be right up the alley of Hackaday readers. The goal is simple: submit a 3D-printed design that incorporates Arduino or other electronics. That’s it! Entries are accepted through September 16, so you’ve still got plenty of time.

Sometimes you see something that just floors you. Check out this tiny ESP32 board. It doesn’t just plug into a USB port – it fits completely inside a standard USB Type A jack. The four-layer board sports an ESP32, FTDI chip, voltage regulator, an LED and a ceramic antenna for WiFi and Bluetooth. Why would you want such a thing? Why wouldn’t you! The board is coming soon on CrowdSupply, so we hope to see projects using this start showing up in the tipline soon.

Here’s a “why didn’t I think of that?” bench tip that just struck us as brilliant. Ever had to probe a board to trace signal paths? It’s a common enough task for reverse engineering and repairs, but with increasingly dense boards, probing a massive number of traces is just too much of a chore. Hackaday superfriend Mike Harrison from “mikeselectricstuff” makes the chore easier with a brush made from fine stainless wires crimped into a ring terminal. Attached to one probe of a multimeter, the brush covers much more of the board at a time, finding the general area where your trace of interest ends up. Once you’re in the neighborhood you can drop back to probing one pad at a time. Genius! We’d imagine a decent brush could also be made from a bit of coax braid too.

Another shop tip to wrap up this week, this one for woodworkers and metalworkers alike. Raw materials are expensive, and getting the most bang for your buck is often a matter of carefully laying out parts on sheet goods to minimize waste. Doing this manually can be a real test of your spatial relations skills, so why not automate it with this cut list optimizer? The app will overlay parts onto user-defined rectangles and snuggle them together to minimize waste. The program takes any units, can account for material lost to kerfs, and will even respect grain direction if needed. It’s built for wood, but it should prove useful for sheet metal on a plasma cutter, acrylic on a laser, or even PCBs on a panel.

Hams Gone Wild: Amateur Radio Field Day 2019

June 19, 2019 by 31 Comments

Of all the images that amateur radio conjures up, the great outdoors doesn’t usually figure heavily. People seem to think hams sit in a dark room at a desk heavy with radio gear, banging out Morse code into late into the night and heedless of the world outside the window. All of which sort of sounds like hard-core gaming, really.

And while that image certainly applies in a lot of cases, hams do like to get out and about at least once a year. That day is upon us with the 2019 Amateur Radio Field Day. Hams across North America reserve the fourth full weekend of each June to tear themselves out of their shacks and get into the world to set up operations in some kind of public venue, generally a park or other green space. Part cookout, part community outreach, and part slumber party – it lasts all weekend and goes around the clock – hams use field day as a chance to show the general public where amateur radio really shines: real-time worldwide communications under austere conditions.

It’s also a chance to get folks excited about getting their license, with many Field Day locations hosting “Get on the Air” stations so that unlicensed folks can try making a contact under the supervision of a licensed operator. Licensed but underequipped hams also get the chance to spin the knobs on someone else’s gear, and maybe line up that first rig purchase. And there are plenty of opportunities to learn about new modes as well, such as FT8 and WSPR. As an example your scribe is looking for some guidance on getting started with APRS, the automated packet reporting system that’s used for things like high-altitude balloon tracking.

If you have any interest at all in learning how to properly operate radio equipment, you owe it to yourself to track down the nearest Field Day location and stop by. The American Radio Relay League (ARRL) has a ton of Field Day information, from a map to locate the 1500 Field Day sites to rules for the contests that will be run that weekend to guides for setting up and operating an effective Field Day setup. There will be 40,000 hams out there this year, and they’d all be thrilled if you drop by and ask a few questions.

Continue reading “Hams Gone Wild: Amateur Radio Field Day 2019” →

New Contest: Flexible PCBs

March 6, 2019 by 14 Comments

The now-humble PCB was revolutionary when it came along, and the whole ecosystem that evolved around it has been a game changer in electronic design. But the PCB is just so… flat. Planar. Two-dimensional. As useful as it is, it gets a little dull sometimes.

Here’s your chance to break out of Flatland and explore the third dimension of circuit design with our brand new Flexible PCB Contest.

We’ve teamed up with Digi-Key for this contest. Digi-Key’s generous sponsorship means 60 contest winners will receive free fabrication of three copies of their flexible PCB design, manufactured through the expertise of OSH Park. So now you can get your flex on with wearables, sensors, or whatever else you can think of that needs a flexible PCB.

Continue reading “New Contest: Flexible PCBs” →

Freeforming The Atari Punk Console

December 29, 2018 by 20 Comments

This stunning piece of art is [Emily Velasco’s] take on the Atari Punk Console. It’s a freeform circuit that synthesizes sound using 555 timers. The circuit has been around for a long time, but her fabrication is completely new and simply incredible!

This isn’t [Emily’s] first rodeo. She previously built the mini CRT sculpture project seen to the left in the image above. Its centerpiece is a tiny CRT from an old video camera viewfinder, and it is fairly common for the driver circuit to understand composite video. And unlike CRTs, small video cameras with composite video output are easily available today for not much money. Together they bring a piece of 1980s-era video equipment into the modern selfie age. The cubic frame holding everything together is also the ground plane, but its main purpose is to give us an unimpeded view. We can admire the detail on this CRT and its accompanying circuitry representing 1982 state of the art in miniaturized consumer electronics. (And yes, high voltage components are safely insulated. Just don’t poke your finger under anything.)

With the experience gained from building that electrically simple brass frame, [Emily] then stepped up the difficulty for her follow-up project. It started with a sound synthesizer circuit built around a pair of 555 timers, popularized in the 1980s and nicknamed the Atari Punk Console. Since APC is a popular circuit found in several other Hackaday-featured projects, [Emily] decided she needed to add something else to stand out. Thus in addition to building her circuit in three-dimensional brass, two photocells were incorporated to give it rudimentary vision into its environment. Stimulus for this now light-sensitive APC were provided in the form of a RGB LED. One with a self-contained circuit to cycle through various colors and blinking patterns.

These two projects neatly bookend the range of roles brass rods can take in your own creations. From a simple frame that stays out of the way to being the central nervous system. While our Circuit Sculpture Contest judges may put emphasis the latter, both are equally valid ways to present something that is aesthetic in addition to being functional. Brass, copper, and wood are a refreshing change of pace from our standard materials of 3D-printed plastic and FR4 PCB. Go forth and explore what you can do!

Continue reading “Freeforming The Atari Punk Console” →

Skeletal Robot Skips The Chassis

December 26, 2018 by 5 Comments

With the high availability of low-cost modular electronic components, building your own little robot buddy is easier and more affordable than ever. But while the electronics might be dirt cheap thanks to the economies of scale, modular robot chassis can be surprisingly expensive. If you’ve got a 3D printer you can always make a chassis that way, but what if you’re looking for something a bit more artisanal?

For his entry into the Circuit Sculpture Contest, [Robson Couto] has built a simple robot which dumps the traditional chassis for a frame made out of bent and soldered copper wire. Not only does this happen to look really cool in a Steampunk kind of way, it’s also a very cheap way of knocking together a basic bot with just the parts you have on hand. Not exactly a heavy-duty chassis, to be sure, but certainly robust enough to rove around your workbench.

The dual servos constrained within the wire frame have been modified for continuous rotation, which combined with the narrow track should make for a fairly maneuverable little bot. [Robson] equipped his servos with copper wheels built in the same style of the frame, which likely isn’t great for traction but really does help sell the overall look. If you aren’t planning on entering your creation into a contest that focuses on unique construction, we’d suggest some more traditional wheels for best results.

The brains of this bot are provided by an ATmega8 with external 16MHz crystal tacked onto the pins. There’s also a ultrasonic sensor board mounted to the servos which eventually will give this little fellow the ability to avoid obstacles. Of course, it doesn’t take a robotics expert to realize there’s currently no onboard power supply in the design. We’d love to say that he’s planning on using the copper loops of the frame to power the thing via induction, but we imagine [Robson] is still fiddling around with the best way to get juice into his wireframe creation before the Contest deadline.

Speaking of which, there’s still plenty of time to get your own Circuit Sculpture creation submitted. If it’s a functional device that isn’t scared to show off the goods, we’re interested in seeing it. Just document the project on Hackaday.io and submit it to the contest before the January 8th, 2019 deadline.

We’re Dreaming Of A Circuit Sculpture Christmas

December 21, 2018 by 6 Comments

Whether or not you chose to believe our claim that we planned it this way, the holidays happen to fall right smack in the middle of our ongoing Circuit Sculpture Contest, which challenges hackers to build circuits that double as bona fide works of art. It’s become almost too easy to spin up your own PCB, so why not try your hand at building in three dimensions and without a net? The holidays are a perfect time for it as it’s not only a reprieve from the work, school, or forced labor camp that usually ties up our waking hours, but can also be a source of inspiration.

Case in point, this festive LED Christmas tree entry that comes our way courtesy of [Vincent Mkes]. This one really has it all: a recognizable theme, fantastic wire work, copious amounts of LEDs, and in a touch that is sure to delight even the electronics Scrooges amongst our readership, he does it all with the venerable 555 timer. It’s really what the Circuit Sculpture Contest is all about: taking a circuit that might otherwise be pretty ordinary and turning it into something truly unique.

The astute Hackaday reader (as if there was any other type) will likely notice there are actually two NE555 timers under the tree, each blinking their respective bank of LEDs at a different frequency. This makes the final result a bit more vibrant, and through some last-minute revisions, [Vincent] was able to hook them both up to a single power supply to really capture the minimalist spirit of the Contest.

As an early Christmas gift to us all, [Vincent] has done an excellent job documenting this build so anyone who wishes to infuse their end of year party with a little diode-driven holiday cheer can follow along. He’s included build instructions as well as diagrams of the circuit, though we encourage anyone looking to make one of their own to experiment a bit and put their own spin on it. After all, this is supposed to be art.

There’s still plenty of time to get your own entry into the Circuit Sculpture Contest, Yule-related or otherwise. Just document your build on Hackaday.io and submit it before the January 8th, 2019 deadline. Remember that entries can’t just look cool, they still need to be functional. Words to live by in general, but doubly important when they’re the rules of a contest.

Packing A Lot Into A Little PCB: Winners Of The Square Inch Project

October 18, 2018 by 12 Comments

It is mind-boggling when you think about the computing power that fits in the palm of your hand these days. It wasn’t long ago when air-conditioned rooms with raised floors hosted computers far less powerful that filled the whole area. Miniaturization is certainly the order of the day. Things are getting smaller every day, too. We were so impressed with the minuscule entries from the first “Square Inch Project” — a contest challenging designers to use 1 inch2 of PCB or less — that we decided bring it back with the Return of the Square Inch Project. The rules really were simple: build something with a PCB that was a square inch.

Grand Prize

It was hard to pick, but there can only be one grand prize winner. This time around that honor goes to [Danny FR] for a very small smart motor driver for robotics. The little board takes an I2C link to a microcontroller and does PID control with RPM feedback. No need for an H-bridge or any sophisticated control electronics — that’s all onboard.

The board is a great fit for a motor and makes it easy to build moving projects. That was the grand prize, but there were some other great entries that won in specific categories, too.

Best Project

[Drix] likes to know where things are. The Hive Tracker uses laser “lighthouses” that sweep across the room. A special microcontroller with a dedicated hardware block reads the laser light and triangulates its position relative to the lighthouses with a great deal of precision. A picture’s worth a thousand words, so:

The high-speed reading of the lasers uses “Programmable Peripheral Interconnect” — a feature of a Nordic BLE microcontroller that lets the chip read timestamps in hardware without interrupting the processor. The little boards hook up to a hub board which is also pretty small.

We’re hackers, so we think a few bare PCBs connected to another PCB can be artistic. But most people have something different in mind.

Best Artistic Project

If you hang out at Hackaday.io much, you’ll recognize [ꝺeshipu] and his entry was one of those things that you immediately know you could use, but also brings a little smile to your face when you use it. How often do you need to plug some LEDs into a breadboard? Why not do it with a Rainbow Jellyfish?

The circuit operation should be obvious. We really liked the color-coded wiring. You could probably use at least two of these so they could keep each other company. You could probably even use this as part of a badge.

Best Social Media Award

Speaking of badges, [nwmaker] built a badge that looks like another animal — an owl called PurpleSnowy. Again, the circuit is simple enough, but what caught our eye on this project was how well the social media promotion of it was. Maybe cute owls are just easier to go viral, but we liked it.

Best Documentation

[Kris Winer] (remember that name), built a very high-tech spectrometer project. Not only was it small in size, but at $25 it was also small in price. The project used the AMS AS7265X 3-chip set to provide an 18 channel, 20 nm FWHM spectrometer. The documentation was very well done and we were impressed with the fitment of the chips on the board.

Many Runners-Up

We had so many great entries that it was hard to pick so we named several runners-up.

[Greg Davill’s] Bosun frame grabber that uses an FPGA to capture images from a FLIR Boson camera.

[Kris Winer’s] high-tech $25 spectrometer project (from above) was also runner-up, and [Kris] was also recognized for sensors that can smell and hear.

If you want something less science-related, the Rotovis-Mod1 by [zakqwy] makes it easier to build persistence of vision displays. Of course, as hackers, we love an oscilloscope and [Mark Omo’s] 20 msps scope that fits in one inch caught our imagination for making some really cool instrument panels.

You really should look at all the entries — they were amazing. [Kris] really went all out, taking two runner up slots and the best documentation prize.

Recap:

Speaking of prizes, The grand prize was $500, and the other prizes received $100 Tindie gift certificates. Thanks to OSH Park, the runner ups also got $100 OSH Park gift cards — that’s a lot of one inch PCBs.

Will this be our last inch square contest? The magic 8 ball says probably not, so don’t stop thinking small and look for your chance to enter your design in the next contest.