A baguette sits diagonally across a wooden cutting board. Above it sits an Arduino and an electronics breadboard.

Theremin Baguette Brings New Meaning To Breadboarding

Theremins are a bit of an odd instrument to begin with, but [AphexHenry] decided to put one where no theremin has gone before: into a baguette.

The “baguetophone” is a theremin and piezo-percussion instrument inside a hollowed-out baguette. Starting with a DIY theremin tutorial from Academy of Media Arts Cologne, [AphexHenry] added some spice with a piezo pickup inside the baguette to function as a percussion instrument. One noted downside of squeezing the instrument into such an unusual enclosure is that the antenna doesn’t respond as well as it might with a more conventional arrangement. Outputs from the piezo and antenna are run through Max/MSP on a computer to turn the bread into a MIDI controller. Like many DIY theremins, it appears that this build neglects the volume antenna, but there’s no reason you couldn’t add one. Maybe disguised as a piece of cheese?

Outside smuggling an instrument into a French café for a flash mob performance, this could also prove handy if you’re someone who gets hungry while playing music. We don’t recommend snacking on the Arduino even if it is ROHS compliant though.

If you want to learn more about how theremins work, check out Theremin in Detail. After that, you might want to browse all of our theremin articles or look at this project where they used a 555 instead.

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The $300,000 3D Printed Car

We’ve noticed an uptick in cars–especially pricey ones–using 3D-printed parts. However, these are usually small and nonstructural parts with a few exceptions. This isn’t the case with the 2024 Cadillac Celestiq. The $300,000 luxury electric vehicle boasts 115 3D-printed parts, according to a post on [TheDrive].

It appears part of the drive–no pun intended–is to allow ultra customizations for people who need more than a car that costs more than a quarter of a million dollars. For example, if you buy an Escalade — another Cadilac vehicle — you have to tolerate that the switches that operate the window are the same as Joe Sixpack has in his Tahoe. Not so, the Celestiq since it has 3D printed switches that could even be customized for a specific owner. The post mentions that the large steering wheel trim is all printed so having, for example, your name, family crest, or company logo embedded in it would be feasible.

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Using Google Calendar For Machines To Keep Track Of Human Days

Daily triggers for automation are simple in theory, unless it needs to keep track of the calendar that humans actually live by. Seasonal changes, shifting public holidays, or just being on vacation are all exceptions you may need to account for. [Jeremy Rode] likes using Google Calendar to stay on top of events, so he created CalendarScraper, a simple script to make his machines use it too.

Jeremy needed a timer for his spa heater that would reduce costs by only switching it on when his local time-of-use-based electricity rates were favorable. The rates varied based on the time of day, day of the week, and even seasons and public holidays. Instead of trying to set up everything manually in a cron job, he created a short and easy-to-modify JavaScript script to keep track of events on a Google Calendar.

We’ve seen some other projects that pull data from Google Calendar, including a recycling day reminder, and even a physical desktop calendar.

Less Is More When It Comes To Sensor Power

It used to be the cost of a microcontroller was a big inhibitor to putting brains in everything, but those days are long gone. Even 32-bit CPUs are now cheap enough that you can throw them into anything. The biggest factor now is probably power. Do you really want to charge your electric toilet seat or change batteries every few weeks? A company called Everactive wants you to ditch your battery using their sensor platform they claim harvests energy from a variety of sources and they are about to deliver their first developer’s kit.

The sensor can measure temperature, humidity, pressure, magnetic field, and acceleration on three axes. The device claims to harvest energy from radio frequencies, vibrations, small temperature differentials or light, even indoors. Our guess is that the sensor package runs on very little and when you poll the device wirelessly, the incoming radio signal supplies power for communication. The company claims its device uses 1000 times less power than competing solutions.

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Cyberdeck Contest 2022: Gibson Rev 001 Thinks Outside The Pelican Case

As we’ve gushed previously in these pages, we saw an incredible turnout for our first-ever cyberdeck contest — so many cool ‘decks rolled in that it made judging them all quite the feat, and we would be remiss if we didn’t feature the favorites that, for whatever reason, didn’t make the cut. One of these is the aptly-named Gibson Rev 001 from [Gadjet].

This cyberdeck may be on the pocket-sized side of things, but don’t let that fool you, because it’s loaded with I/O and sensors galore. A Pimoroni Breakout Garden provides particle/smoke and pulse oximetry, temperature/pressure/altitude, an air quality sensor, and a UVA/UVB light sensor — plenty of feelers for judging conditions on the fly. As you might expect, the brains of the operation is a Raspi 4, which is running Twister OS.

We love the dual-display thing going on with the 7″ touchscreen and the color e-ink display — really gives it a cobbled-together-yet-polished, futuristic feel. May the rest of the post-apocalypse gadgetry have such clean lines and cheerful colors (if that’s what you’re into).

2022 Hackaday Supercon: Joe [Kingpin] Grand Keynote And Workshops Galore

It’s our great pleasure to announce that Joe [Kingpin] Grand is going to be our keynote speaker at the 2022 Supercon!

If you don’t know Joe, he’s a hacker’s hacker. He’s behind the earliest DEFCON electronic badges, to which we can trace our modern #badgelife creative culture. He was at the l0pht when it became the most publicly visible hackerspace in the USA, at the dawn of what we now think of as cybersecurity. And moreover, he’s a tireless teacher of the art of hardware hacking.

Joe’s talk at DEFCON 22 about reverse engineering PCBs on a hacker budget is on our top-10 must watch playlist, and his JTAGulator debug-port enumeration device has been present at the start of countless hacking sessions. But again, it’s his enthusiasm for creating, his inspiring “what if I poke at this thing this way?” attitude, and overwhelming hacker spirit that make Joe a long-overdue speaker at Supercon! Continue reading “2022 Hackaday Supercon: Joe [Kingpin] Grand Keynote And Workshops Galore”

Build Your Own Concrete 3D Printer

We didn’t notice [Nikita]’s post about building a concrete 3D printer, a few months ago, but the idea seems sound: build a basic CNC XY axis and then add a mortar pump and hose to deposit concrete. The video, below, shows the machine in operation.

While it looks interesting, there is essentially no real Z-axis, so this would be limited to some sort of relatively thin forms unless you, perhaps, did a few layers and then further lifted the machine. We also assume wet concrete won’t bridge at all. Still, this might be an interesting project, especially if you have a spare CNC XY axis floating around.

If you buy everything, though, you are looking at an estimated cost of around $7,000 USD. We presume there is enough weight in the concrete that a conventional 3D printer probably isn’t going to cut it. We did wonder, though, if there would be any merit to connecting a conventional plastic-extruding nozzle to be able to lay down support for the concrete.

This might be a good jumping-off point for a more sophisticated machine. In particular, [Nikita] points out that a progressive cavity pump with a variable frequency drive is ideal, because it allows you to vary the extrusion rate and provides a steady flow of concrete. Armed with that knowledge, you could probably figure out the rest pretty easily if you’ve ever built a 3D printer or CNC machine.

Not the first concrete printer we’ve seen, of course. The one we saw before was capable of some pretty amazing things.

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