Author: Brian Benchoff

5250 Articles

Video Quick Bit: The Best DIY Musical Instruments

November 1, 2018 by No comments

The Hackaday Prize is almost over, and soon we’ll know the winners of the greatest hardware competition on the planet. A few weeks ago, we wrapped up the last challenge in the Hackaday Prize, the Musical Instrument Challenge. This is our challenge to build something that goes beyond traditional music instrumentation. Majenta’s back again looking at the coolest projects in the Musical Instrument Challenge in the Hackaday Prize.

We’re old-school hardware hackers here, and when you think about building your own drum machine, there’s really nothing more impressive than building one out of an Atari 2600. That’s what [John Sutley] did with his Syndrum project. It’s a custom cartridge for an Atari with a fancy ZIF socket. Of course, you need some way to trigger those drum sounds, so [John] is using an Arduino connected to the controller port as a sort-of MIDI-to-Joystick bridge.

If you want more retro consoles turned into musical instruments, look no further than [Aristides]’ DMG-01 Ukulele. It’s a ukulele with a 3D printed neck, bolted onto the original ‘brick’ Game Boy. Yes, it works as a ukulele, but that’s not the cool part. There are electronics inside that sense each individual string and turn it into a distorted chiptune assault on the ears. Just awesome.

How about a unique, new musical instrument? That’s what [Tim] is doing with Stylish!, a wearable music synthesizer. It’s based heavily on a stylophone, but with a few interesting twists. It’s built around an STM32, so there are a lot of options for what this instrument sounds like, and it’s all wrapped up in a beautiful enclosure. It’s some of the best work we’ve seen in this year’s Musical Instrument Challenge.

The Hackaday Prize is almost over, and on Saturday we’ll be announcing the winners at this year’s Hackaday Superconference. Tune in to the live stream to see which project will walk away with the grand prize of $50,000!

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This Weekend: The Greatest Hardware Conference

October 31, 2018 by 4 Comments

The Hackaday Superconference is this weekend and it’s the greatest hardware con on the planet. Tickets are completely sold out, but you can still get in on the fun by watching the livestream and joining Supercon chat.

For everyone who will be here in person, the entire Hackaday crew is busy as beavers preparing for your arrival. We’re assembling badges, rigging AV for the talks, stuffing goodie bags, calling caterers, and taping cables to the floor. This is by far the biggest Superconference yet.

Doors open at 9 am Friday at the Supplyframe HQ. This is your first chance to get your hands on the fantastic Supercon Badge that’s a freakin’ computer. The day is filled with badge hacking, workshops, badge talks, and a launch party. [Rich Hogben] and [Andrew Bakhit] will be doing live IDM sets on Friday night, as we celebrate into the wee hours of the morning.

Saturday, doors open at 9 am over at the Supplyframe Design Lab as we turn on the livestream and get the main event under way with over 50 speakers and workshops. Badge hacking continues throughout the weekend, and this year we’ve added the SMD Soldering Challenge to the fun. There will be meetups during Supercon; the Tindie meetup and the amateur radio meetup are both Saturday at 1 pm.

Subscribe to Hackaday on YouTube and follow us on Facebook to keep up with everything going on.

The Swiss Army Knife Of Audio Synthesis

October 31, 2018 by 42 Comments

Thirty years ago, we would be lucky if a computer could play audio. Take a computer from twenty years ago, and you’ll be lucky if it can play an MP3 in real-time. Now, computers can handle hundreds of tracks of CD-quality audio, and microcontrollers are several times more powerful than a desktop computer of the mid-90s. This means, of course, that microcontrollers can do audio very, very well. For his entry to the Hackaday Prize, [Fabien] is capitalizing on this power to create a Swiss Army knife of audio synthesis. It’s called the Noise Nugget, and it’s just what you need when you want to put audio in anything.

The microcontroller in question is an ARM Cortex-M4 running at 180MHz, with a quality DAC. There’s connectivity in the form of USB, two audio outs, one audio in, I2C, UART, and GPIOs. With this, you’ve got a digital synthesizer with a MIDI interface, audio effects for guitar pedal tomfoolery, an audio effect trigger board for playing pre-recorded sounds, a digital recorder, and a USB sound interface.

So, with all that processing power, what can the Noise Nugget actually do? Well, first of all, it’s a sampler. [Fabien] has a video demo of the Noise Nugget set up in sampler mode, where it can play a lute-ish sample and a cat sound. All of this is controlled over MIDI and played through a cheap speaker. The results — except for the cat sample — sound great. You can check that video out below.

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Wavetable General MIDI For Everyone

October 30, 2018 by 13 Comments

There are only so many ways to generate music with a computer, and by far the most popular method is MIDI. It’s been around for thirty-five years, and you don’t get to be a decades-old standard for no reason. That said, turning MIDI into audio is a pain, but this project in the Musical Instrument Challenge for the Hackaday Prize makes it easy. It’s a Fluxamasynth Module that turns MIDI into something you can hear.

The key to this build is a single chip that takes MIDI data in and spits out audio, according to the 128 general MIDI sounds. This might not sound like much, but if you’ve ever tried to turn MIDI into sound, you’ll find your options are limited. There is exactly one chip that can do this and is easily obtainable: the SAM2695 from Dream Sound Synthesis. This chip was originally designed for cheap toy keyboards, but if you have a chip, you can do anything with it.

The Fluxamasynth Modules are inspired by the original Fluxamasynth, an Arduino shield that is basically a breakout board for the SAM chip. There’s a MIDI in, and an 1/8″ jack for output, and not much else. The Fluxamasynth Modules extend the capability by adding more support, including stereo output, reverb, chorus, flange, and delay effects, and digs down deep into the configurable parameters for tuning.

The hardware is basically an audio appliance for the Arduino, Raspberry Pi, and the ESP32, and allows for generative music through code. You can see an example of this project in the video below.

Continue reading “Wavetable General MIDI For Everyone” →

New Part Day: ST’s New 3D Printer Motor Driver

October 29, 2018 by 21 Comments

ST has released a new evaluation board for a stepper motor driver. It’ll plug right into your 3D printer, and if you’re looking for a chip to build a cheap 3D printer controller board around, this might be the one.

We’ve come a long way in the field of stepper motor drivers in just a few short years. The first popular driver for RepRap electronics was ‘the Pololu’, a stepper motor carrier board using Allegro’s A4988 driver. If you had a big heat sink, this driver could deliver 2 A per coil, operated between 8 and 35 V, and had microstep resolution down to 1/16th. Was it the best stepper driver around? No, but it was cheap, it was everywhere, and RAMPS, the popular RepRap control electronics picked up on its pinout and accidentally created a standard. The DRV8825 motor driver from TI followed next, with microstepping down to 1/32nd, a little more current per coil, and arguably a better thermal design.

Then the wave of Trinamic drivers happened. The Trinamic TMC2100 was a silent stepper motor driver when running a motor at medium or low speeds. With this driver, you could run a motor more efficiently, which means the motor doesn’t get as hot. There are diagnostics via SPI. Tom liked it, and now in every Prusa i3, you’ll find a bunch of Trinamic drivers.

ST’s new offering, the STSPIN820, doesn’t have the fancy-schmancy features the Trinamic driver does, but the chip itself is fantastically cheap, at about 1/5th the price of a Trinamic driver. As far as feature set, you should probably look at this new chip as an upgrade to the A4988, with much higher microstepping and slightly higher current handling.

If you’d like to experiment with the evaluation module, you can grab one from an ST distributor; at the time of this writing, there were seventeen of these modules available worldwide. If you’d just like to play with the STSPIN820 motor driver chip, ten thousand are available between Mouser and Digikey, starting at $2.97 in quantity one. If someone could tell electronics manufacturers to build more than a dozen evaluation boards at a time, that would be great.

The Incredible Judges Of The Hackaday Prize

October 29, 2018 by No comments

The time to enter The Hackaday Prize has ended, but that doesn’t mean we’re done with the world’s greatest hardware competition just yet. Over the past few months, we’ve gotten a sneak peek at over a thousand amazing projects, from Open Hardware to Human Computer Interfaces. This is a contest, though, and to decide the winner, we’re tapping some of the greats in the hardware world to judge these astonishing projects.

Below are just a preview of the judges in this year’s Hackaday Prize. They’ve been busy looking over all of the finalists and on Saturday we’ll announce the winners of the Hackaday Prize at the Hackaday Superconference in Pasadena. This is not an event to be missed — not only are we going to hear some fantastic technical talks from the hardware greats, but we’re also going to see who will walk away with the Grand Prize of $50,000.

Quinn Dunki

The mighty Quinn has been making games for 36 years on platforms ranging from the Apple II to all manner of newfangled things. She currently manages engineering for mobile games at Scopely, and pursues consulting, independent development, mixed-media engineering projects, and writing. Quinn is best known to the Hackaday crowd for Veronica, the 6502 system with everything and the kitchen sink on a backplane. It’s got PS/2, VGA, and Pong in ROM. The build log for Veronica has been an inspiration to many, and served as the basis for numerous homebrew systems. She continues to inspire with her blog, her YouTube Channel, and of course her Hackaday articles.

Eben Upton

In his earlier life, Eben founded two successful mobile game and middleware companies, but right now he’s most famous for founding the Raspberry Pi foundation and serving as the CEO of Raspberry Pi (Trading) LTD. Under his leadership, the Raspberry Pi has grown from some weird looking board with a USB port on one end, HDMI on the other, and a camera stuck in the middle. After months of work, hopes this computer might not be vaporware grew, and now the Raspberry Pi is the best-selling computer ever made (with apologies to the engineers behind the best selling home computer ever made).

Lauren McCarthy

Lauren McCarthy is an artist based in Los Angles and Brooklyn whose work explores systems for being a person and interacting with other people. She is an Assistant Professor at UCLA Design Media Arts, a Sundance Institute Fellow, and was previously a resident at CMU STUDIO for Creative Inquiry, Eyebeam, Autodesk, and more. Lauren’s work has been exhibited internationally, at places such as Ars Electronica, Fotomuseum Winterthur, SIGGRAPH, Onassis Cultural Center, IDFA DocLab, and the Japan Media Arts Festival. She is the creator of p5.js, an open source platform for learning creative expression through code online.

Chris Anderson

From 2001 through 2012, Chris was the Editor in Chief of Wired Magazine, but now he’s the CEO of 3DR and founder of DIY Drones and DIY Robotcars. These Robocar races are held monthly-ish, and have so far proven an ideal platform to teach kids STEM, and have become something like the next generation of BattleBots, only with a few more computer vision algorithms and a few less RC transmitters. In addition to Robocars, Chris is one of the greatest advocates for flying drones, including those of the fixed-wing variety.

 

These are just a few of the amazingly accomplished judges we have lined up to determine the winner of this year’s Hackaday Prize. The winner will be announced on November 3rd at the Hackaday Superconference. If you can’t join us in person, don’t worry. We’re going to be live streaming everything, including the prize ceremony, where one team will walk away with the grand prize of $50,000. It’s not an event to miss.

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