Just for a second, let’s perform a little engineering-based thought experiment. Let’s design a guitar tuner. First up, you’ll need a 1/4″ input, and some op-amps to get that signal into a microcontroller. In the microcontroller, you’re going to be doing some FFT. If you’re really fancy, you’ll have some lookup tables and an interface to switch between A440, maybe A430, and if you’re a huge nerd, C256. The interface is simple enough — just use a seven-segment display and a few LEDs to tell the user what note they’re on and how on-pitch they are. All in all, the design isn’t that hard.
Now let’s design a tuner for blind musicians. This makes things a bit more interesting. That LED interface isn’t going to work, and you’ve got to figure out a better way of telling the musician they’re on-pitch. This is the idea of [Pepijn]’s Accessible Guitar Tuner. It’s a finalist in The Hackaday Prize Assistive Technology round, and a really interesting problem to solve.
Most of [Pepijn]’s tuner is what you would expect — microcontrollers and FFT. The microcontroller is an ATMega, which is sufficient enough for a simple guitar tuner. The real trick here is the interface. [Pepijn] modulating the input from the guitar against a reference frequency. The difference between the guitar and this reference frequency is then turned into clicks and played through headphones. Fewer clicks mean the guitar is closer to being in tune.
This is one of those projects that’s a perfect fit for the Hackaday Prize Assistive Technology round. It’s an extremely simple problem to define, somewhat easy to build, and very useful. That doesn’t mean [Pepijn] isn’t having problems — he’s having a lot of trouble with the signal levels from a guitar. He’s looking for some help, so if you have some insights in reading signals that range from tiny piezos to active humbuckers, give him a few words of advice.
This is the type of crowd that’s famous for building their own test equipment. If you need a way to program a flash chip, don’t go out and buy one — you can just build one. Need a spectrum analyzer? You can build that out of copper clad board. For his Hackaday Prize entry, [oakkar7] is building an optical power meter, capable enough to do futzy fiber work, but still completely DIY.
When you get into networking and telecom connections that don’t begin with the letters ‘RJ’, you start to stumble upon SPF transceivers. These ‘small form factor pluggable’ devices are little modular transceivers capable of handling fiber, Gigabit Ethernet, and other slightly weirder bit pipes. When used with fiber, they can measure optical power in dBm and watts, and can be debugged by a UART.
[oakkar]’s optical power meter uses these SPF transceivers, tied together with a fairly simple circuit consisting of an Arduino, a few tact switches, a Nokia LCD, and an FTDI UART. The key in tying all of this together is an Arduino library for SPF and DDM (Digital Diagnostics Monitoring), giving the user access to all the configuration bits in these transceivers.
While the circuit is simple enough to be built on a piece of perfboard, [oakkar] really knocked it out of the park with the enclosure on this one. With just a little bit of laser cut acrylic and a few standoffs, [oakkar] has a device that actually looks professional, and has most of the capabilities of fancier, more expensive tools.
If you want to found a company, you’ll find pages and pages of advice scattered around the Internet telling you exactly how to do that. What if you want to found an Open Source hardware company? That’s a bit harder — you can’t do hardware as a service, and that Open Source moniker will drive away investors.
[Zach Fredin] is one of the rare founders that are making an Open Source hardware company work. In 2015, he developed NeuroBytes, a system of electric neurons designed in such a way that if you get two hundred or so, you can replicate the brain of a flatworm. NeuroBytes was a finalist in the 2015 Hackaday Prize, the team received an NHS grant, and now these PCB neurons will be on the market late this year.
For this week’s Hack Chat, we’re going to be talking to [Zach] about the challenges about creating a company from nothing and doing it the Open Source way. Topics for this Friday’s Hack Chat will include the experience of building an Open Source hardware company, manufacturing, building a community around a product, and business spelled with dollar signs.
The Nokia 3210 is the greatest cell phone ever made. The battery lasted for days, custom color covers were available at every mall kiosk, it had the Snake game, and the chassis for this phone was finely crafted out of the crust of neutron stars. It was indestructible; it is the reason we now appreciate technology over more impermanent concepts like relationships and love.
For his Hackaday Prize entry, [Bastian] is bringing the Nokia 3210 into this century. He’s designing a circuit board with the same footprint, the same button layout, and a better screen that drops right into the lovely plastic enclosure of the 3210.
The current BOM for the upgraded 3210 includes an STM32 F7 microcontroller, which is more or less the current top of the line ARM micro you can get. For wireless, [Bastian] is using an A7 GSM/GPRS module and an ESP8266 for a little bit of WiFi. For a dumbphone, this is ludicrously overpowered. Provided [Bastian] gets a prototype up and running, there will be some interesting applications for a device this powerful in a package this indestructible.
One of the things [Bastian] has been butting his head against with this project is KiCad. Microvias don’t work like they should in KiCad — they’re restricted to the outer layers only. This is a problem for routing a complex board like this, so [Bastian] wrote a patch that gives KiCad an ‘I know what I’m doing mode’ for microvias everywhere.
This is truly the spirit of The Hackaday Prize: not only is [Bastian] building something ridiculous, he’s also creating the tools to do it.
Today, we’re excited to announce the winners of the Assistive Technologies portion of The Hackaday Prize. In this round, we’re looking for projects that will help ensure a better quality of life for the disabled. Whether this is something that enhances learning, working, or daily living. These are the projects that turn ‘disability’ into ‘this ability’.
Hackaday is currently hosting the greatest hardware competition on Earth. We’re giving away hundreds of thousands of dollars to hardware creators to build the next great thing. Last week, we wrapped up the fourth of five challenges. It was all about showing a design to Build Something That Matters. Hundreds entered and began their quest to build a device to change the world.
There’s still one entry challenge remaining in The Hackaday Prize. Anything Goes is on right now and open to every idea imaginable. If you’re building a computer made of sand, awesome. Quadcopter hammock? Neat. This is the portion of the Hackaday Prize that’s open to the best ideas out there. It’s up to you to explain how your creation makes the world a little bit better place.
The winners of the Assistive Technologies challenge are, in no particular order:
Hackaday is 13! We’re going through a bit of a rebellious phase. There’s hair where there wasn’t hair before. Thirteen years ago (Sept. 5, 2004), [Phil Torrone] published the first Hackaday Post. [Phil] posted a great writeup of the history of Hackaday over on the Adafruit blog — we were saved from the AOL borg because of the word ‘hack’ — and interviewed the former and current editors of your favorite DIY website. Here’s to 13 more years and to [Phil] finding a copy of the first version of the Jolly Wrencher designed in Macromedia Flash.
Hurricanes are an awesome force of nature. As we learned from Harvey a week ago, livestreamed footage from the eyewall of a hurricane is fascinating. [Jeff Piotrowski] seems to be the streamer of choice. If you’re looking for something to gawk at, here you go.
Another burn is over, and I still have no idea how they moved the fuselage of a 747 from Palmdale to the playa.
You know we’re doing this whole Hackaday Prize thing where we’re giving a ton of money to people for creating cool hardware, right? We’re almost done with that. The last round of The Hackaday Prize is going on right now. The theme is anything goes, or rather there is no theme. The goal of this round is to build cool stuff. This round ends on October 16th, and yes, we’ll have the results for the Assistive Technologies round out shortly.
[Prusa] makes a lot of printers, and that means he needs to make a lot of parts to make a lot of printers. Obviously, a PTFE-cutting robot is the solution to this problem
SparkFun has a new wing of hardware mischief. It’s SparkX, the brainchild of SparkFun’s founder [Nate Seidle]. Over the past few months, SparkX has released breakout boards for weird sensors, and built a safe cracking robot that got all the hacker cred at DEF CON. Now, SparkX is going off on an even weirder tangent: they have released The Prototype. That’s actually the name of the product. What is it? It’s a HARP, a hardware alternate reality game. It’s gaming, puzzlecraft, and crypto all wrapped up in a weird electronic board.
The product page for The Prototype is exactly as illuminating as you would expect for a piece of puzzle electronics. There is literally zero information on the product page, but from the one clear picture, we can see a few bits and bobs that might be relevant. The Prototype features a microSD card socket, an LED that might be a WS2812, a DIP-8 socket, a USB port, what could be a power switch, a PCB antenna, and a strange black cylinder. Mysteries abound. There is good news: the only thing you need to decrypt The Prototype is a computer and an open mind. We’re assuming that means a serial terminal.
The Prototype hasn’t been out for long, and very few people have one in hand. That said, the idea of a piece of hardware sold as a puzzle is something we haven’t seen outside of conference badges. The more relaxed distribution of The Prototype is rather appealing, and we’re looking forward to a few communities popping up around HARP games.