Motorized Picnic Table Terrorizes Perth Streets

November 19, 2015 by 26 Comments

There is a public menace on the streets of Perth, Australia: two motorized picnic tables. Police are looking for the drivers of the, erm, vehicles, which were seen cruising down the West Coast Highway, complete with passenger casually sitting on the tables having a drink. It looks like the two picnic tables are being driven by a centrally mounted lawnmower motor and are controlled from one of the seats. The police are interested because it is illegal to drive something on the public road in Australia that isn’t properly licensed. I’ll bet that his insurance probably doesn’t cover taking it out for a spin on the highway, either. The accompanying TV news report does not identify the person responsible, but they claim have spoken to the builder, who says that the two tables can manage up to 50 miles per hour. They claim that he is even working on an upgraded model that includes a built-in barbecue, which could bring a whole new meaning to the term drive-thru.

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A Networked Analog Clock

November 19, 2015 by 20 Comments

Even in the face of an Internet of Things grasping for a useful use case, an Internet-connected clock is actually a great idea. With a cheap WiFi module and a connection to an NTP server, any clock can become an atomic clock. [Jim] decided to experiment with the ESP8266 to turn a cheap analog clock into something that will display network time using a bunch of gears and motors.

The clock [Jim] chose for this build is an extremely cheap clock pulled right from the shelves of WalMart. This clock uses a standard quartz clock mechanism, powered by a single AA cell. The coils in these quartz movements can be easily controlled by pulsing current through them, and with a few a few transistors and diodes set up in an h-bridge, an ESP8266 is quite good at setting the time on this clock.

The software for this clock first connects to the WiFi network, then checks an NTP server for the true time. Once the ESP8266 gets the time, it starts hammering the coil in the clock movement until the hands are where they should be.

[Jim] says the project needs a bit of work – there is no feedback on the clock to determine the position of the hands. Instead, the time is just set assuming the clock hands started off at 12:00. Still, even with that small fault, it’s a great build and a great exploit of what can be done with a cheap quarts clock movement.

If you’d like to go to the opposite extreme of cost and complexity, how about a DIY retro atomic clock?  Or if you’re in need of a wakeup, we’ve seen a ton of alarm clock posts in the past few weeks.

Full Size Star Wars Holochess Build

November 19, 2015 by 5 Comments

The quality and attention to detail seen in [Ian Martin]’s build is impressive regardless of his choice to build a functioning holochess set. We’re not to take away from the nerd-gasm this build invokes, but we’d rather draw to attention the craftsmanship of the builder. Sadly [Ian] doesn’t have a proper blog or product page but you can view everything he posts about the project on his social networking page and get his take on the finished work in the video below.

This build is not just a well engineered mechanical design, the electronics that run the controls and indicators are [Ian]’s home brew Arduino Mega shields. A complete game requires two sets of electronics, one for each side of the table so rolling his own shield was probably a space saving decision.

Each of the figures used as game pieces were hand sculpted and painted (is that a Rancor to the right?). User controls are presented in true-to-form fashion with 54 buttons, 26 lights, 10 knobs, and an LCD screen with custom bezel to display custom monster status. Nope, the monsters aren’t animated holograms but to make up for that [Ian] built in ambient noises so you know which are still alive. This is our first time discovering that there is a name other than “Holochess” for the game: Dejarik. We’ll leave it up to the reader to figure out how it’s played.

This is an impressive build and we can’t wait to see what else [Ian] comes up with in the future. We have covered Star Wars builds before and some interesting board game builds but never where the two meet before this.

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Hacking Chinese State Media

November 18, 2015 by 54 Comments

A while ago, a few journalists from China visited the Metalab hackerspace in Vienna. They wanted to do a story on ‘fablabs’ and ‘makerspaces’, despite the objections to the residents of the Metalab hackerspace. Apparently, mentioning ‘hacking’ on China Central Television (yes, it’s called CCTV) is a big no-no.

hacking-chinese-state-mediaWanting to send a message to at least a few people in China, the members of the hackerspace had to think laterally. Metalab member [amir] came up with a way to encode data that could be printed on t-shirts. These bright, colorful squares featured in all of the interviews with Metalab members carried messages like, “free tibet!”, “remember tian’anmen 1989” and “question the government. dont trust the propaganda”

All the videos are available in this playlist, and [amir]’s code to generate the colorful rectangles of political activism can be found here.

In a related note, we’d like to say ‘hi’ to our one reader in North Korea. Yes, according to the stats and analytics, we have one reader in North Korea.

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Speaker Science Project

November 18, 2015 by 10 Comments

They probably won’t please the audiophiles, but [KJMagnetics] shows you that can create a pair of speakers with some magnets, some plastic cups, and a bit of magnet wire. Creating speakers out of junk isn’t a new idea, of course. However, there’s something pleasant about the build. Maybe it is the symmetry of the cups or the workbench look of the woodworking.

We couldn’t help but think that this would make a good science fair project or a classroom activity. Especially since there is a good write up on how speakers work and it would be easy to make simple changes to test different hypothesis about speakers. For example, what happens with more or less wire in the coils? What magnets work best? What does best even mean? Is it louder? Less distortion?

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Coffee Straight From The Tap

November 18, 2015 by 43 Comments

Do you love coffee? Of course you do. Do you sometimes wish you could drink coffee instead of water? Do you want to void the warranty on your hot water heater? Yes? Well, then we have the hack for you!

A Norweigan science show called Ikke gjør dette hjemme (Do Not Try This at Home) decided it would be fun to see what would happen if you turned your hot water heater into a giant coffee machine. They didn’t put much effort into the conversion, in fact, they just opened up the tank and poured copious amounts of instant coffee into the tank. But they did it, and that saves us from wondering if it’s possible. Spoiler: It is.

Stick around after the break to see the water run brown — in a good way.

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Water-Saving Agricultural System Wins Best Product

November 18, 2015 by 31 Comments

The 2015 Hackaday Prize included something new: a prize for the Best Product. The winner took home $100k in funding, a six-month residency at the Supplyframe Design Lab in Pasadena, and help turning a budding product into a full-grown success. And the winner is…

Vinduino

vinduino-shot0007 Water is a crucial element for farming: the plants need enough, but not too much. Water is also an increasingly precious resource all over the world. In California, five times as much water is used in agriculture as is used by residential consumers. A 25% reduction in agricultural use, for instance, would entirely offset all urban water use. With this in mind, a number of California farmers are trying to voluntarily reduce their water consumption. But how?

One important development is targeted irrigation. Getting precisely the right amount of water to each plant can reduce the fraction lost to evaporation or runoff. It’s a small thing, but it’s a very big deal.

Cue Vinduino, a long-running project of “gentleman farmer” and hacker [Reinier van der Lee]. As a system, Vinduino aims to make it easy and relatively inexpensive to measure the amount of water in the soil at different depths, to log this information, and to eventually tailor the farm’s water usage to the plants and their environment. We were able to catch up with [Reinier] at the Hackaday SuperConference the day after results were announced. He shared his story of developing Vinduino and recounts how he felt when it was named Best Product:

The product that won Best Product is simple, but very well executed. It’s a hand-held soil moisture sensor reader that couples with a DIY soil probe design to create a versatile and inexpensive system. All of the 2015 Best Product Finalists were exceptional. Vinduino’s attention to detail, room for expansion, and the potential to help the world pushed this project over the top.

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