In Soviet Russia, Drink Serves You

There’s just something about having an automatic bartending machine that screams “we’re in the future now” — and it’s a future we approve of. This project is called the Alkomat (Google Translate), and it’s a handy little machine capable of mixing drinks for five people at a time.

Inspired by the RumBot, [Strn] wanted to practice his hand at hardware integration and product development from idea to creation — and just looking at some of the photos of this, he did a damn good job.

On the inside of Alkomat is a recycled inkjet XY carriage which can index on each of the five drinks. A series of four tubes feed up to peristaltic pumps that provide alcohol from the bar rack. Once he had the hardware sorted out and operational, he set out to make the machine look as presentable as possible. Using a mixture of counter-tops and laminated wood panels from furniture, he’s boxed up the whole thing and made it look like something you might actually be able to buy from a store — maybe IKEA?

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Mini Fridge turned Gameboy Puts Hot Games on Ice

The plain old white mini fridge, a staple of many dorm rooms could use a little decoration. The resemblance to a classic gameboy is not that hard to imagine with some novelty stickers, but [ModPurist] went the extra mile with his Cold Boy.

1514387thumbMaking a mini fridge into a playable gameboy involves taking apart the door, once in a Raspberry Pi 2 is fitted in along with a second hand “square screen” LCD. The front of the door is cut for some custom wooden buttons, which are connected to tactile switches. Once everything is fit and finished the door is reassembled, so the fridge can resume its normal life keeping soda and hot dogs good and cold. [ModPurist] covered the progression of the hack in his work log.

While it’s a little low to the ground, it should be a hit at college parties where being on the floor is not unusual. Join us after  the break for a demonstration video and get your game on. It is, of course, missing one thing. There needs to be some type of latch inside to secure the beverages until the Konami code is entered.

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RIP: HitchBot

Equal parts art project and social media experiment, with a dash of backyard hackery “robotics” thrown in for good measure, hitchBot was an experiment in the kindness of strangers. That is, the kindness of strangers toward a beer bucket filled with a bunch of electronics with a cute LED smiley face.

The experiment came to a tragic end (vandalism, naturally) in Philadelphia PA, after travelling a month across Canada, ten days in Germany, and yet another month across the Netherlands. It survived two weeks in the USA, which is more than the cynics would have guessed, but a few Grand Canyons short of the American Dream.

Professors [David Smith] and [Frauke Zeller] built hitchBot to see how far cuteness and social media buzz could go. [Smith], a former hitchhiker himself, also wanted hitchBot to be a commentary on how society’s attitudes toward hitching and public trust have changed since the 70s. Would people would pick it up on the side of the street, plug it in to their own cigarette lighters, and maybe even take it to a baseball game? Judging by hitchBot’s Twitter feed, the answer was yes. And for that, little bucket, we salute you!

But this is Hackaday, and we don’t pull punches, even for the recently deceased. It’s not clear how much “bot” there was in hitchBot. It looks like it had a GPS, batteries, and a solar cell. We can’t tell if it took its own pictures, but the photos on Twitter seem to be from another perspective. It had enough brains inside to read out Wikipedia entries and do some rudimentary voice recognition tasks, so it was a step up from Tweenbots but was still reassuringly non-Terminator.

Instead, hitchBot had more digital marketing mavens and social media savants on its payroll than [Miley Cyrus] and got tons of press coverage, which seems to have been part of the point from the very start. And by writing this blog post, we’re playing right into [Smith] and [Zeller]’s plan. If you make a robot / art project cute enough to win the hearts of many, they might just rebuild it. [Margaret Atwood] has even suggested on Twitter that people might crowdfund-up a hitchBot 2.0.

Our suggestion? Open-source the build plans, and let thousands of hitchBots take its place.

Overengineering Beer Pong

If there’s one game that deserves to be overengineered with hundreds of LEDs, sensors, and electronic modules, it’s beer pong. [Jeff] has created the most ostentatious beer pong table we’ve ever seen. It’s just shy of playing beer pong on a single gigantic LED display, and boy, does it look good.

The table includes a 32×12 grid of LEDs in the center of the table, with 10 pods for Solo cups at each end of the table. These pods have 20 RGB LEDs each and infrared sensors that react to a cup being placed on them. The outer edge of the table has 12 LED rings for spectators, giving this beer pong table 1122 total LEDs on 608 individual channels.

With that many LEDs, how to drive all of them becomes very important. There’s a very large custom board in this table with a PIC24 microcontroller, TLC5955 PWM drivers, and enough IDC headers to seriously reconsider using IDC headers.

Put enough LEDs on something and it’s bound to be cool, but [Jeff] is taking this several steps further with some interesting features. There’s a Bluetooth module for controlling the table with a phone, a VU meter to give the table some audio-based visualizations, and air baths for cleaning the balls; drop a ball down the ‘in’ hole, and it pops out the ‘out’ hole, good as new. If you’ve ever wondered how much effort can go into building a beer pong table, there you go. Video below.

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Thar be Beer in These Walls

When you need a cold one and walking downstairs to your twin-keg refrigerator just won’t do, it’s time to break out the tools to deliver that frothy goodness where it’s needed. And so began [DaveLondres’] inspiring tale of piping beer through the walls of his home.

Now we know what you’re thinking… that beer is going to get mighty warm sitting in long lines from the fridge up to the ground floor. [Dave] thought about that too and designed a double-pipe system to overcome the issue. A run of PVC pipe for each keg connect the in-wall taps to holes drilled in the side of a second-hand fridge. An ingenious branching job yields an extra port for each run which was fitted with computer case fans to keep the cold air circulating. Plastic tubing is snaked inside of the PVC to carry the beer.

Rounding out the craftsmanship on this one is the inclusion of a plumbed drain to whisk away the drippings. If you’re not going to have a beautifully adorned chest-freezer-gone-kegerator in your livingroom this is the best alternative we’ve seen.

[via reddit]

Measuring Alcohol Content With Time of Flight Sensors

[Chris] is a homebrewer – the tasty kind – and wanted a way to track the rate of specific gravity against temperature. Tracking temperature is easy, all you need is a 1-wire temperature probe hooked up to the microcontroller of your choice. Logging the rate of fermentation isn’t as simple, but with a time of flight sensor, a hydrometer, and some pool toys, [Chris] kludged something together that works reasonably well.

Specific gravity, and thus fermentation, has been measured for centuries with hydrometers. Not wanting to complicate matters with electronic sensors, [Chris] built a floating cage for his hydrometer out of a clear tube, a kick board, and a few bits of styrofoam. By placing a Sparkfun time of flight sensor at the top of the tube, and lowering the hydrometer into his fermentation bucket, [Chris] can measure the height of the hydrometer above the level of the liquid in his fermentation bucket.

Both the temperature and specific gravity are logged to a Raspberry Pi, and after combing through this data [Chris] can see a big ‘bump’ in the specific gravity due to a mass of foam, tapering down to the desired values after a day or so.

Brewing Beer with a Sous Vide Cooker

[Ken] found an interesting use for his sous vide cooker. He’s been using it to help him with his home brewing. It’s unlikely that the manufacturer ever intended it to be used in this manner, but as hackers we don’t really care about warranties.

Beer brewing is as much of an art as it is a science. There are a lot of variables that go into the process, and tweaking any one of them can result in your beer tasting different. There is one process during brewing that is called mashing. Mashing is when you soak malted grains in hot water to pull out the sugar. The amount of sugar that gets extracted is very dependent on how long the grains are soaked, and the temperature of the water. If you want your beer to taste a certain way, then you want to ensure that the water stays at constant, repeatable temperature.

As a home brewer, [Ken] has been using his stove top to heat the water. This gets the water warm, but in order to keep the temperature consistent, he has to constantly monitor the temperature and adjust the knob accordingly. Who wants to sit around and do that all day? He needed something to control the temperature automatically. Enter the sous vide cooker.

Sous vide is a method of cooking in which food is placed into an airtight bag and then submerged in a water bath with very strict temperature control. The process takes a long time to cook the food, but the result is supposed to be meat that is cooked perfectly even while also retaining all of the moisture and juices. [Ken] figured he might be able to use a sous vide cooker to control the temperature of the mash instead of a water bath.

His experiment worked wonderfully. He used the stove top to help get the mash up to the close temperature, then the sous vide cooker was used to fine tune things from there. [Ken] says he was able to achieve 75% efficiency with his mash, which is exactly what he was going for. Continue reading “Brewing Beer with a Sous Vide Cooker”