Wireless Tin Can Telephone

For many kids, the tin-can telephone is a fun science experiment that doesn’t last much longer than it takes to tangle the string around a nearby tree. [Geoff] decided to go a different however, building a tin-can telephone that’s completely wireless.

The build starts with a hacker favorite, the Arduino Uno. It’s hooked up to an microphone input board which uses the Arduino’s analog input to pick up audio. The Arduino then sends this data out over an NRF24L01+ wireless transceiver, to be picked up by the corresponding tin can receiver at the other end. An LM386 is given amplifier duties, hooked up to a small speaker so the user can hear the incoming audio.

The Arduino Uno is in no way a high-fidelity digital audio platform, but the project does deliver some legible, if scratchy, voice transmission. It also serves as a great way to learn about radio communications and working with digital audio signals. The NRF24L01+ is a great way to add wireless communication to a project, and if you’re looking for more range, we’ve got that covered, too. Video after the break.

Continue reading “Wireless Tin Can Telephone”

Hackaday Links Column Banner

Hackaday Links: June 7, 2020

For many of us who were in college at the time, the 1989 release of Will Wright’s classic SimCity sounded the death knell of our GPAs. Being able to create virtual worlds and then smite them with a tornado or a kaiju attack was the stuff of a procrastinator’s dreams. We always liked the industrial side of the game best, and took great pains in laying out the factory zones, power plants, and seaports. Those of a similar bent will be happy to know that Maxis, the studio behind the game, had a business simulations division, and one of their products was a complete refinery simulator the studio built for Chevron called, unsurprisingly, SimRefinery. The game, which bears a striking resemblance to SimCity, has been recovered and is now available for download, which means endless procrastination by playing virtual petrochemical engineer is only a mouse click away.

Speaking of time wasters, we stumbled upon another simulation this week that sucked away a couple of hours of productivity. As RTL-SDR.com reports, YouTuber called Information Zulu has a 24/7 live stream showing arrivals and departures at Los Angeles International Airport. That may sound boring, but the cameras used to watch the runways are virtual, and the planes are animated based on ADS-B data being scooped up by an RTL-SDR dongle. We pinged Information Zulu and asked for a rundown of the gear behind the system, but never heard back. If we do, we’ll post a full article on what we learned, because the level of detail is amazing. The arriving and departing planes sport the correct livery for the airline, the current weather conditions are shown, taxiing is shown in real time, and there’s even an audio feed from air traffic control.

If you’re looking to gain back a little of the productivity lost to the last two items, Digi-Key might be able to help with their new PCB Builder service. All you have to do is upload your gerbers and select your materials, and they’ll give you options for a bunch of different quick-turn fabrication houses. Looks mighty convenient.

Steve Mould dropped a video this week about vibration analysis. That might not sound very exciting, but the fascinating bit is how companies are now using motion amplification video techniques to show how and where industrial equipment is moving, even if those motions are too subtle to be seen by the naked eye. It’s frankly terrifying to see how pipes flex and tanks expand and contract, and how pumps and motors move relative to each other. The technique used is similar to the way a person’s pulse can be detected on a video by the subtle color change as blood rushes into capillaries. We’d love to see someone tackle a homebrew version of this so we can all see what’s going on around us.

And finally, we want to remind everyone that the Hackaday Prize is back, and that you should get your entries going. What’s new this year is the Dream Team challenges, where four worthy non-profits organizations will each assemble a three-person team to work on a specific pain-point in their process. The application deadline has been extended to June 9, and there are two $3,000 microgrants, one in June and one in July, for each team member. So look through the design briefs and see if your skills match their needs.

Hackaday Prize And UCPLA Are Driving Assistive Technology Forward

Take a second to imagine all the people in your life. Your family, friends, coworkers. Your buddies down at the hackerspace, and anyone you chat with on IO and over the airwaves. Statistically speaking, one in four of these people has a disability of some kind, and needs help doing everyday things that you might not think twice about — simple things like opening doors or interacting with computers. Or maybe that one in four is you.

For the past 75 years, United Cerebral Palsy of LA (UCPLA) have been helping people with various developmental and intellectual disabilities to live independently with dignity. They work directly with members of the disabled community to develop assistive technology that is both affordable and dependable. UCPLA helps the disabled community with everything from employment to providing a creative outlet, and gives them the tools to do these things and more. Their mission is to help people be as independent as possible so they can feel good about themselves and enjoy a life without limits.

The people behind this non-profit are all about inclusion, access, and opportunity, and this is why we are proud to partner with UCPLA for the 2020 Hackaday Prize. With the world in upheaval, there is no better time to build a better future for everyone. You never know when you might need assistive technology. In addition to the open challenge that calls for everyone to work on a design, this year there is also a Dream Team challenge which offers a $3,000 per month stipend over the next two months to work on a team addressing one specific challenge. Apply for that asap!

What kind of challenges has UCPLA outlined for the Hackaday Prize? Let’s dive in and find out, and we’ll also hear from the UCPLA team in a Q&A video at the end of the article.

Continue reading “Hackaday Prize And UCPLA Are Driving Assistive Technology Forward”

Hackaday Prize And Conservation X Labs Issue Design Challenges To Address Extinction Crisis

When most people think of extinct species, they likely imagine prehistoric creatures such as dinosaurs or woolly mammoths. Extinction is something you read about in history books, nature’s way of removing contestants in the great game of life. It’s a product of a cruel and savage world, and outside of a few remaining fringe cases, something that humanity’s advanced technology has put a stop to.

Unfortunately, the truth is far more complicated than that. The planet is currently going through its sixth major extinction event, and this time, it’s our fault. Humanity might not be willfully destroying the natural habitats of the plants, fish, birds, and other lifeforms that have been eradicated, but we’re responsible for it just the same. Humans are an apex predator unlike any the world has ever seen before, and the only force that can stop us is ourselves.

Founded in 2015, Conservation X Labs is devoted to doing everything it can to end this sixth wave of extinction. Unsatisfied with the pace of traditional conservation, they leverage technology and open innovation to develop unique new ways of combating the damage our species has done to life on this planet. After all, it’s the only one we’ve got.

We’ve partnered with this organization to help develop solutions to some of these problems. This includes an open call challenge that anyone can enter, and a Dream Team program that you can get involved with if you act quickly. Let’s take a look at what Conservation X Labs is all about, and what is involved with the challenges at hand.

Continue reading “Hackaday Prize And Conservation X Labs Issue Design Challenges To Address Extinction Crisis”

2020 Hackaday Prize Hack Chat With Majenta Strongheart

Join us on Wednesday, May 27 at noon Pacific for the 2020 Hackaday Prize Hack Chat with Majenta Strongheart!

It hardly seems possible, but the Hackaday Prize, the world’s greatest hardware design contest, is once more at hand. But the world of 2020 is vastly different than it was last year, and the challenges we all suddenly face have become both more numerous and more acute as a result. We’ve seen hackers rise to the challenges presented by the events of the last few months in unexpected ways, coming up with imaginative solutions and pressing the limits of what’s possible. What this community can do when it is faced with a real challenge is inspiring.

Now it’s time to take that momentum and apply it to some of the other problems the world is facing. For the 2020 Hackaday Prize, we’re asking you to throw your creativity at challenges in conservation, disaster response, assistive technology, and renewable resources. We’ve teamed up with leading non-profits in those areas, each of which has specific challenges they need you to address.

With $200,000 in prize money at stake, we’re sure you’re going to want to step up to the challenge. To help get you started, Majenta Strongheart, Head of Design and Partnerships at Supplyframe, will drop by the Hack Chat with all the details on the 2020 Hackaday Prize. Come prepared to pick her brain on what needs doing and how best to tackle the problems that the Prize is trying to address. And find out about all the extras, like the “Dream Team” microgrants, the wild card prize, and the community picks.

join-hack-chatOur Hack Chats are live community events in the Hackaday.io Hack Chat group messaging. This week we’ll be sitting down on Wednesday, May 27 at 12:00 PM Pacific time. If time zones have got you down, we have a handy time zone converter.

Click that speech bubble to the right, and you’ll be taken directly to the Hack Chat group on Hackaday.io. You don’t have to wait until Wednesday; join whenever you want and you can see what the community is talking about.

Start Your Engines!

Here we go again: The 2020 Hackaday Prize has just been announced! And as usual, we want to see you all using your powers for good, to help make the world a better place. The twist this year is that four nonprofits have been selected, and your job is to help them with their goals: developing solutions to aid ocean conservation, creating or redesigning open-source assistive tools for people with cerebral palsy, designing modular housing for communities in need, and engineering open-source medical and technical tools that can be easily built in the field.

How often have you wanted to help, but been held back by lacking the background knowledge of which problems to tackle, or where to start? That’s the point of teaming up with non-profits that already have a very tangible need right now.

Oh, and did we mention the prize money? Not only can you do good, but you’ll also do well! The Best All Around Solution gets $50,000, there are four $10,000 prizes, one for each non-profit, $3,000 honorable mentions, a $5,000 wildcard, twenty $500community-chosen prizes, and then the twelve two-month Dream Team grants.

Pshwew! There’s something for everyone, and that’s made possible by our sponsors:Supplyframe, Digi-Key, Microchip, and ARM.

We’ve got four good ways for you to do good. Get out there and get hacking!

This article is part of the Hackaday.com newsletter, delivered every seven days for each of the last 200+ weeks. It also includes our favorite articles from the last seven days that you can see on the web version of the newsletter.

Want this type of article to hit your inbox every Friday morning? You should sign up!

2020 Hackaday Prize Reveals Four Open Challenges And New Dream Team Program

The 2020 Hackaday Prize begins right now. Our global engineering challenge seeks solutions to real-world problems. If you like to come up with creative solutions to tough problems, four non-profits can use your help. We need hackers, designers, and engineers throughout the world to work on designs for conservation, disaster relief, renewable resources, and assistive devices.

This is the seventh year of the Hackaday Prize, and like past years we want to see your ideas take shape, so share your design process in detail as a project page on Hackaday.io. Over $200,000 in prizes are at stake, with a $50,000 prize for the all around best solution which will then be designed for manufacture at Supplyframe’s DesignLab, produced in a limited run, and deployed in the field.

New this year is our partnership with non-profits that have each outlined challenges they are facing. Eight projects, one top finisher, and one runner up from each of the four categories of challenges, will receive $10,000 and $3,000 respectively. As with previous years, the bootstrap round offers some seed money for getting your prototype off the ground: up to $500 for each of the top twenty during early entry judging. There’s even a $5,000 wildcard prize for entries that don’t specifically address challenges from the four categories. Here’s a taste of the categories you can work on:

  • Develop solutions to combat invasive species in marine and island environments, and help craft tools for protecting our natural ocean landscapes
  • Low cost tools for use in the field like a heat sealers/welders, and medical devices like IV fluid warmers
  • Adaptive technologies for workstations like trackballs, joysticks, and large button controllers
  • Modular add-ons for earthen housing for connectivity, light, heating, and water storage

Continue reading “2020 Hackaday Prize Reveals Four Open Challenges And New Dream Team Program”