Monitor Keg Volume, CO2, And Temp

December 14, 2009 by Mike Szczys 13 Comments

[Jean-Michel] tipped us off about his beer keg monitoring setup. It can tell you how much beer is left in each keg, how much carbon dioxide remains in the canister, and it can monitor and regulate temperature.

An Arduino mega is the brain of the system. A shield was built to interface force sensors, measuring the weight of the keg to estimate how much beer remains. Analog temperature sensors allow for temperature monitoring and control of the compressor for regulation. Information can be displayed on a graphic LCD or a computer via XBee wireless communications.

This is along the lines of the SparkFun kegerator but we like the added functionality. Does this need to Twitter? Probably not but if you want that, it’s only a bit of a software hack away.

RGB Keylock Shield

December 13, 2009 by Mike Szczys 17 Comments

Hackaday alum [Will O’Brien] cleaned up his messy breadboard with an RGB keylock Arduino shield. You may remember this two-part project from last year. It uses buttons backlit by an RGB LED to operate a door lock.

[Will] is still mulling over what type of kit options he will offer. We’re happy to see if the most important part, a laser-cut key bezel, will be available. This makes for a professional looking finish that made the original project difficult to replicate.

Arduino Development On OpenSolaris

December 13, 2009 by Mike Szczys 22 Comments

Part of the draw of Arduino development is that it is open-source and cross-platform. It is hard to believe that it took this long but OpenSolaris can be added to the list of operating systems that love to work with Arduino. Although not officially supported, the device drivers for were added in build 113 of the OS and a patched version of the toolchain is available for download.

[Thanks Alexander]

Remote Bike Mountain

December 11, 2009 by Caleb Kraft 18 Comments

The Remote Bike project, caught our eye today. Inspired by “cliff hangers” on the tv show “The Price Is Right”, [atduskgreg] has built his own version. In this version, the bike on the mountain makes progress, or slides back down the mountain based on the speed you pedal. If you maintain your target speed long enough, you make it to the top of the mountain and win. The RPMs are gathered from a stationary bike using a hall effect sensor, then piped to an Arduino that controls the bike via a stepper motor and string. That seems fun, and a decent alternative to biking through google maps or something. We have to wonder how long this would be amusing though. Then again, when you’re on a stationary bike you are usually just using a timer or a heart rate monitor anyway, so this is pretty cool.

[via flickr]

Word Clock Redux

December 11, 2009 by Jakob Griffith 21 Comments

[drj113] wrote back to let us know his latest version of the infamous Word Clock, now in Arduino flavor. You may remember when we originally showed you the Word Clock back in September, while much hasn’t changed, he’s added and modified a few things to make it more user-friendly. Most notably is the use of Arduino instead of PIC, while some commentators will complain this as a waste of an Arduino, it is extending the project towards those who are less technically inclined. Other changes include a new case, dedicated time changing buttons, and blue LEDs (and who doesn’t love blue).

We would also like to give [Alex], one of our commentators, a shout out with is QlockTwo. Same Word Clock concept, but used acrylic, paper sheet, and stickers to produce a much smoother look.

Update: It would appear we’ve made a slight mistake, the original creator of the QlockTwo is actually [Ruud Burger], not [Alex]. Thanks [Ruud] for clearing that up.

Overly Complicated Gas Guage

December 8, 2009 by Caleb Kraft 39 Comments

While this is most likely overkill for a gas gauge, we do thank [VadimS] for sharing the information. He shows us how to build a capacitive liquid sensor using an Arduino, some foil and some wire. He’s basically detecting the difference in capacitance between the foil sheets. As he gets more water in the bottle, the capacitance goes up. At least we think thats what is going on. He has included the source code for the Arduino, both for handling the sensor and running the LCD display shown in the picture above. When completed, this will be used in his dune buggy for a gas gauge.

Nunk On Droise

December 6, 2009 by Caleb Kraft 23 Comments

Nunk on Droise is an art installation where noise is made depending on how drunk you are. In a configuration that could be called a cthoilet, the sensors shown above are alcohol sensors. Though we initially thought this would be testing urine, the description states that it tests the breath of the participant. Unfortunately there aren’t any schematics or code, though you can see how it is all assembled from the flickr pool. You can also see a video demonstration of the prototype.