Hack a Day http://www.hackaday.com Hack a Day http://www.hackaday.com/media/feedlogo.gif Hack a Day http://www.hackaday.com en-us Copyright 2008 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://podcasts.hackaday.com/rss.xmlUV drip bicycle trackerhttp://www.hackaday.com/2008/07/25/uv-drip-bicycle-tracker/http://www.hackaday.com/2008/07/25/uv-drip-bicycle-tracker/http://www.hackaday.com/2008/07/25/uv-drip-bicycle-tracker/#commentsFiled under: ,


[Che-Wei Wang] has a few more projects up his sleeve aside from his pneumatic power suit. This is a bit artsy, but he created an ultraviolet ink dropper to leave a trail of invisible ink wherever he rides his bike. Just think of it as a modernized version of [MacGyver]'s paint can under the bad guys car tracking system.
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]]>gotducttapeWill O'Brien2008-07-25T07:00:00+00:00Drill powered mini bikehttp://www.hackaday.com/2008/07/24/drill-powered-mini-bike/http://www.hackaday.com/2008/07/24/drill-powered-mini-bike/http://www.hackaday.com/2008/07/24/drill-powered-mini-bike/#commentsFiled under:


DPX Systems seems to deal exclusively in devices powered by handheld drills. In addition to the mini bike in the video above, they've made systems for wheelchairs, toolboxes, and hoists. The device costs $630, but we know most of you just need prompting that something is possible to be well on your way to building your own version. We're still more fond of weed whacker machines.

[via Toolmonger]
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]]>dpxdpxsystemselectricelectricdrillevminibikepowerdrillvideoweedwhackerweedwhackermotorEliot Phillips2008-07-24T21:00:00+00:00Motorized unicycleshttp://www.hackaday.com/2008/07/10/motorized-unicycles/http://www.hackaday.com/2008/07/10/motorized-unicycles/http://www.hackaday.com/2008/07/10/motorized-unicycles/#commentsFiled under: ,


The Segway may be a technological wonder, but motorized balancing transportation has been around for a while. We've gathered up some of our favorite motorized unicycles for your knee scraping enjoyment.

The design above makes us immediately think of the very recent wonder by [Ben Gulak] that earned him the cover of Popular Science. Strangely enough, when reading about [Ben] we didn't see any mention of Noah. Designed by [Andre Franca] of Brazil, it won 2nd place in the Plascar Automotive Design Contest in 2007. The designs are extremely similar.


[scheerti] posted the mysterious wonder above on S-blog. It's in Hungarian though, so we'll just have to live in suspense until someone helps us out with the translation.



Bombardier, the maker of many popular recreational vehicles, released a design a while back. Unfortunately, they stated that it may never be produced. It has a unique "landing gear" system for parking. You can see it under the front fender in the left shot above. The EMBRIO was an exercise in design, showing what Bombardier envisions recreational vehicles to be like in the year 2025.


Not to be left out of the race, Audi has shown off a unique design. Designed by [Tilmann Schlootz] This award winning design incorporates a spherical wheel and multidirectional drive train. That means that this bad boy can go any direction while facing any direction. Check out the seating, it converts smoothly from one seat to two. Just imagine helping your date into the SNOOK for a night on the town.


If those others were too wild or fast for you, why not check out some more traditional models. Pictured above is [Trevor Blackwell]'s electric unicycle, which is pretty much exactly as it sounds. There is also the enicycle and the Einrad-Fahrzeug.


For a more rugged application,look at Le Monorue. It was designed by [Jackie Chabanais] who has also created a ton of other single wheeled vehicles.


Out on the fringe, you will find the Riot Wheel . Different from any other single wheel design out there, it defies classification. Built for a trip to Burning Man, it gained instant publicity and has since been featured on Discovery Channel's Monster Nation. While we're talking about different ones, check out Leviskate. You stand on it like a skateboard... or at least try.


Lets not forget about good old [Dean Kamen], the inventor of the Segway. He's filed a patent for a single wheeled version too. Unlike the Segway, this one comes with a seat!
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]]>bombardierembriomonowheelmotorcyclemotorizedunicyclenoahsegwaysinglewheelmotorcycletrevorblackwellunicycleCaleb Kraft2008-07-10T17:45:00+00:00Motorcycle engine powered cars http://www.hackaday.com/2008/07/06/motorcycle-engine-powered-cars/http://www.hackaday.com/2008/07/06/motorcycle-engine-powered-cars/http://www.hackaday.com/2008/07/06/motorcycle-engine-powered-cars/#commentsFiled under:


Autoblog recently posted about the LusoMotors LM23, a track car powered by a Honda CBR1000 that weighs less than 900 pounds. We knew there have been quite a few other home built cars that have foregone traditional engines for motorcycle power plants, so we asked Google for a few project suggestions. It turned up this excellent round up of motorcycle powered cars by The Kneeslider. The usual Caterham suspects show up, but there are many other unique vehicles: from Mini and Fiat conversions to the unique sidemounted engine in the DP1 pictured above. Definitely check out this excellent collection.
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]]>carenginehyabusalightweightmotorcyclemotorcycleenginemotorcyclepoweredEliot Phillips2008-07-06T21:35:00+00:0012 channel LiFe battery management systemhttp://www.hackaday.com/2008/07/04/12-channel-life-battery-management-system/http://www.hackaday.com/2008/07/04/12-channel-life-battery-management-system/http://www.hackaday.com/2008/07/04/12-channel-life-battery-management-system/#commentsFiled under: ,


With fuel prices rising, EVs are becoming more an more stylish. This bit of floor tile wrapped hardware is actually a 12 channel battery management system designed to handle Lithium Iron battery packs. It's designed to take power from a standard lead acid charger and supply the batteries with their maximum charge current. The cost and complexity of the BMS has been a major stumbling block in the past, so it's interesting to see these come around. If you need more than 12 cells, multiple boards can be used.
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]]>diyEVlifeWill O'Brien2008-07-04T07:50:00+00:00British Steam Carhttp://www.hackaday.com/2008/07/01/british-steam-car/http://www.hackaday.com/2008/07/01/british-steam-car/http://www.hackaday.com/2008/07/01/british-steam-car/#commentsFiled under:


The land-speed record for steam-powered locomotion has been holding steady for 88 years at 127mph, but a team of British engineers and stunt drivers will attempt to break it with the Steam Car.

The Steam Car works by burning liquid petroleum fuel at 750° F, which heats 10.5 gallons of water, converting into steam. The steam passes through lagged pipes before it is injected into the 360-hp Curtis turbine at extremely high pressure and speed via compressed air hydraulics. It spins the turbine at over 13,000 rpm, powering the rear wheels, allowing the car to reach speeds higher than 150mph. The car itself is 25 feet long and uses about 1.86 miles of tubing. All of the hot pressurized steam is ejected from the exhaust, which means the car is only capable of running for about 3 minutes, and requires an 8-minute warmup.

The attempt to break the speed record will occur in late August at Bonneville.

[via Newlaunches]
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]]>carsenginessteamsteampowerturbineturbinesJuan Aguilar2008-07-01T18:40:00+00:00Kawasaki KZ440 electric conversionhttp://www.hackaday.com/2008/06/25/kawasaki-kz440-electric-conversion/http://www.hackaday.com/2008/06/25/kawasaki-kz440-electric-conversion/http://www.hackaday.com/2008/06/25/kawasaki-kz440-electric-conversion/#commentsFiled under:


[Ben Nelson] didn't even know how to ride a motorcycle when he started on this electric conversion of a 1981 Kawasaki KZ440. The engine wasn't a loss since the bike was nonrunning when he purchased it for $100. The permanent magnet Etek motor was $500 and each of the four yellow top batteries were $160 (only three pictured). He says that the majority of the conversion work only took two weekends. The resulting, still street legal, ride averages 20 miles per charge with a 45mph top speed.

More electric motorcycles on Hack a Day:
[via Ecomodder]
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]]>batteryconversionelectricelectricmotorcycleevmotorcycleEliot Phillips2008-06-25T23:15:00+00:00Motorcycle throttle bodies for your carhttp://www.hackaday.com/2008/06/22/motorcycle-throttle-bodies-for-your-car/http://www.hackaday.com/2008/06/22/motorcycle-throttle-bodies-for-your-car/http://www.hackaday.com/2008/06/22/motorcycle-throttle-bodies-for-your-car/#commentsFiled under: ,


[Dem_z] modded his Honda VTEC engine to use a set of individual throttle bodies from a 2001 Suzuki GSX-R motorcycle. The fuel injection bungs on the throttle bodies were epoxied shut and the bodies were only used to provide individual butterflies for each cylinder. This one doesn't quite make our to do list, but it's definitely a hack.

[bender386] caught my blunder first, so I'll be sending him a bit of Hack-A-Day swag. In the meantime, here's a little bonus: Check out this home built anamorphic lens. Native 2.35:1 projectors have started showing up, but they're insanely expensive. By adding some image processing and a lens to stretch the projected image, you can get full width projection and use all the pixels on the projector.
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]]>god noGodNojust wrongJustWrongmotorcyclevroomWill O'Brien2008-06-22T07:28:00+00:00The Price of His Toys returnshttp://www.hackaday.com/2008/06/19/the-price-of-his-toys-returns/http://www.hackaday.com/2008/06/19/the-price-of-his-toys-returns/http://www.hackaday.com/2008/06/19/the-price-of-his-toys-returns/#commentsFiled under: ,


We're big fans of scratch built transportation and got some great news earlier this month: After a long hiatus, thepriceofhistoys.com has returned and is ready to serve up all the news about kit cars and home-built cars that you could want. For those who don't know, kit cars are sets of car parts that require assembly often lacking drivetrain components, which must be acquired from donor vehicles. Aside from kit cars, home-builds, and the occasional custom job, many of the cars the site discusses are also for sale.

Kit cars can be pretty fun on their own, but many of the builds featured on the site spice it up further by adding varying levels of customization. This Tornado McLaren M6 GTR Replica, for example, uses a 3.5L V8 Rover engine and some custom body work to improve visibility. Another fascinating and rare kit uses a Beetle's chassis and features a body that looks like a Beetle crossed with a Porche. Of course, none of these are as practical cutting a Geo Metro in half for improved milage, but to car kit builders, practicality holds a very low place on their list of priorities.
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]]>carkitcarkitscarskitcarthepriceofhistoysJuan Aguilar2008-06-19T02:30:00+00:00Electric recumbent bicycleshttp://www.hackaday.com/2008/06/16/electric-recumbent-bicycles/http://www.hackaday.com/2008/06/16/electric-recumbent-bicycles/http://www.hackaday.com/2008/06/16/electric-recumbent-bicycles/#commentsFiled under:


If you liked our post about bikes and skates with weed whacker engines but want more power and more challenge, we have good news. We've found some great instructions on adding motors to recumbent bicycles, which we'll take you through after the break.
The first project we found is the E-cumbent by [Matt Shumaker] . [Shumaker]'s ongoing project uses a power unit he constructed out of RC airplane electronics: the motor, the controller, a servo tester, and a battery eliminator circuit connected to 14 lithium polymer cells plus several CNC milled parts. The power drive connects to a sprocket mounted on the left side of the rear wheel. The bike is constructed with two reduction stages; the second stage has a freewheel that allows the rider to pedal while the motor idles, use the motor and pedal power combined, or use motor power alone. [Shumaker] also built a display console onto the handlebars, which shows trip information, MPH, and information on battery usage.


[Warren Beauchamp] designed a somewhat more simple electric recumbent he calls the Cuda-E. This design uses a 450 watt motor from a Mongoose pedal/electric motocross bike. It doesn't just take the motor, though: it uses the entire rear subframe. The recumbent uses the motocross bike's single pivot rear suspension, which attaches the rear and front subframes with a pivot and and a shock absorber. The motor is powered by a 24V lithium phosphate battery pack, but like the last project, [Beauchamp]'s recumbent can use any combination of pedaling and motor power.


A third project we found is by [Dana Barlow], and it really whet our appetite for more detail. [Barlow] chose to use parts from the same kind of motocross bike [Beauchamp] did, but unlike him, [Barlow] did not leave the motor in its original place on the rear subframe. Instead, he moved it to just above the freewheel, freeing up the space for a larger wheel to be used. [Barlow]'s bike is also distinct from the last two in that it uses remote steering: the handlebars and the suspension fork are on two different shafts. Unfortunately, very little information on the process was in the write-up.

All of these projects were found on Recumbents.com, which is a great one-stop resource for information on buying, building, riding, and racing recumbent bicycles.
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]]>bicyclebikebikeselectricelectricbikeelectricrecumbentelectricvehicleevrecumbentrecumbentbicyclerecumbentbikerecumbents.comJuan Aguilar2008-06-16T15:45:00+00:00Geo Metro halved for better mileagehttp://www.hackaday.com/2008/06/16/geo-metro-halved-for-better-mileage/http://www.hackaday.com/2008/06/16/geo-metro-halved-for-better-mileage/http://www.hackaday.com/2008/06/16/geo-metro-halved-for-better-mileage/#commentsFiled under:


[Doug Heffron] modified this 1989 Geo Metro way back in 1993. Gas prices had just started breaking $1.00/gallon and he wanted to show manufacturers how to build a fuel efficient vehicle in such troubling times. The car already got 58mpg (Prius: 46mpg), but [Doug] decided he could do better with some aero modifications. The car was converted to tandem seating and stripped of any extra weight. In its final form, it got 75mpg, but then gas prices stabilized and it was laid to rest in a shed. You can find out more about the car and see photos from the build on its site (painful resizing).

[via Autoblog]
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]]>aerodynamicsdougheffronfuelefficientgeogeometrometrompgpriusEliot Phillips2008-06-16T14:15:00+00:00Hubless inline skateboardhttp://www.hackaday.com/2008/06/11/hubless-inline-skateboard/http://www.hackaday.com/2008/06/11/hubless-inline-skateboard/http://www.hackaday.com/2008/06/11/hubless-inline-skateboard/#commentsFiled under: ,


We've been talking a lot about alternate modes of transportation lately. The 360 inline skateboard immediately caught our eye for its simplicity and hubless wheel design. The usage seems fairly straightforward, but the videos posted by designer [Francesco Sommacal] don't make it look exceptionally fun; more like they're daring you to use the thing. What we find most jarring about this is how similar it is to the Bushpig. Did the commercial gas powered version really predate this unpowered device?

The design is simple enough to understand, but we're not really sure where you can easily source hubless wheels like this. Any ideas?

[via Gizmodo]
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]]>360bushpigpersonaltransportationpersonaltransporterssegwaywheelsJuan Aguilar2008-06-11T19:30:00+00:00Steven Laurie's Art of the Motorhttp://www.hackaday.com/2008/06/09/steven-lauries-art-of-the-motor/http://www.hackaday.com/2008/06/09/steven-lauries-art-of-the-motor/http://www.hackaday.com/2008/06/09/steven-lauries-art-of-the-motor/#commentsFiled under:


We've served up dozens if not hundreds of machines with a practical purpose, but we are always interested in machines like those [Steven Laurie] makes, which serve no other purpose than looking impressive, spewing smoke, leaving tire marks, and making a lot of racket. We'll give you the scoop on Steve's motor art after the break.

[Steven Laurie] is a native of Whitby, Ontario, where a local art gallery called the Station Gallery is exhibiting his motor-powered artwork. There [Laurie] demonstrated his Posi-Track Burnout Machine, which looks something like a souped-up lawnmower sitting on top of a car axle. Instead of being pushed along the grass, though, the burnout machine revs against the pavement creating skid marks on the asphalt as it pulls forward against the grip of the driver.


Another of Laurie's machines, the Handheld Rubber Burner, does much the same thing as the Burnout Machine, except instead of making long skid marks, it is intended to create user-designed skid marks. This custom machine is small enough to be held and directed using two hands. He also designed a similar device called the Stationary Rubber Burner (also called the Donut Machine) with the same purpose in mind, but it can only create circular skid marks since it pivots around center post. All three machines create skid marks, but the true art is in the performance, with the tires squealing, the engine revving, and the smell and the smoke of burning rubber fill the air.


For the pure visceral sensation of revving engine sounds, Laurie created the Boom Tube. It is a lawnmower engine mounted on a stand with an exhaust tube jutting upward. It does nothing more than idle and create a distinctive sound.


A slightly more interactive take on the concept is his Stationary Revving Machine. It is little more than an engine with a gas pedal, but like his other creations, it is intended to evoke the sounds and smells associated with muscle cars.


Laurie is nothing if not thorough, as evidenced by a smaller revving machine he named Wild Thing. It's just a chainsaw with a large exhaust tip and no cutting ability.

Two other machines, the Ape Hanger Rumbler and the Grass Ripping/Grave Diggin' Machine are also part of the exhibit. Even though we know you like machines that do practical things, we recommend that you contemplate your gear lust at this exhibit if you're in the Ontario area. If not, check out [Steven Laurie]'s Flickr stream.
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]]>burningrubberengineenginesmotormotorartmotorsskidmarksstevenlaurieJuan Aguilar2008-06-09T20:30:00+00:00Wheels and weed whackershttp://www.hackaday.com/2008/06/06/wheels-and-weed-whackers/http://www.hackaday.com/2008/06/06/wheels-and-weed-whackers/http://www.hackaday.com/2008/06/06/wheels-and-weed-whackers/#commentsFiled under:


Perhaps you've seen this image before: a young kid tooling around on a pair of inline skates, pushed forward by a weed whacker cycle. While the instructions for this device would seem fairly obvious (attach wheel to weed whacker) the writeup appears to be nonexistent. If you have any information, do let us know, but in the meantime, enjoy these other weed whacker powered projects.

For fun and practicality, we'll start with this weed whacker bike. It uses an Echo SRM-210 trimmer motor. The pedals of the bike were replaced with a second sprocket driven by a chain attached to the motor. The bike reportedly does up to 25mph and 100mpg. The nice thing about the these motors is they work no matter what the orientation.


We found another bike assisted by a weed whacker motor, but instead of removing the pedals and powering the gears, this bike simply attaches a 31cc weed whacker with a model plane propeller. The propeller provides thrust, but don't expect this design to work near as efficiently as the previous one.


If you think we're cheating by talking about bikes where we should be discussing skates, slow down. Trust us, you'll really wish you could slow down when you strap on these skates: they pack 25cc motors mounted on the back of the right skate, which achieves speeds of 20mph like the kid in the picture. These are made to order by a Chinese manufacturer, just don't bother trying to buy a pair in the UK.
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]]>bicyclebikemotorrollerbladesrollerbladingweedwackerweedwhackerweedwhackermotorJuan Aguilar2008-06-06T17:00:00+00:00Powered bicycleshttp://www.hackaday.com/2008/06/01/powered-bicycles/http://www.hackaday.com/2008/06/01/powered-bicycles/http://www.hackaday.com/2008/06/01/powered-bicycles/#commentsFiled under:


We've started to noticing a lot of commercial electric bikes on the street. Last year we looked at an electric trike project, after the break find out what people have been up to lately with similar projects.



[Jeff Radtke] and [Hans Noeldner] are two engineers who put together a self-contained electric powered bicycle wheel. The unit can attach to just about any bike and covers around 10-20 miles on each charge. By using standard Dewalt 36V battery packs, new batteries can be easily swapped out when needed. Overall you are getting about 1HP with this setup and maximum speed of 28MPH.


Inventor [Eric Peltzer] recently announced his electric bike project was going open source. After sharing his experience through on his website for years he is now looking for contributors to help develop and monetize the project.


[Frankg] lost his license some time ago so he built himself another form of transportation. He candidly takes us through the building and tweaking of his electric bike conversion through his website. He even takes us through the process of how not to build an electric bike as well.
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]]>bicyclebikeelectic vehicleelecticalElecticVehicleevSean Percival2008-06-01T18:00:00+00:00Picaxe tachometerhttp://www.hackaday.com/2008/06/01/picaxe-tachometer/http://www.hackaday.com/2008/06/01/picaxe-tachometer/http://www.hackaday.com/2008/06/01/picaxe-tachometer/#commentsFiled under: ,


It might seem like we're on a vehicle hacking kick this weekend, but [Rex] built an excellent custom digital tach for his race car. It uses the classic seven segment displays, a PICAXE microcontroller and works with most engines. He's released full source and PC board designs to boot. This looks like a great little tachometer project for you microcontoller fiends out there.
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]]>digital gaugesDigitalGaugesdiygaugesvehicleWill O'Brien2008-06-01T00:51:00+00:00Digidash: digital dashboard for megasquirthttp://www.hackaday.com/2008/05/31/digidash-digital-dashboard-for-megasquirt/http://www.hackaday.com/2008/05/31/digidash-digital-dashboard-for-megasquirt/http://www.hackaday.com/2008/05/31/digidash-digital-dashboard-for-megasquirt/#commentsFiled under: ,


The Digidash project is an open source digital dashboard designed just for the megasquirt EFI system we mentioned in our diy EFI motorcycle post. Unfortunately, the site doesn't link the hardware design. From the description, I'm assuming that it's essentially a graphic LCD driven by an Atmel microcontroller that talks to the Megasquirt to get the display info.
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]]>dashboarddigitalefiknight riderKnightRiderWill O'Brien2008-05-31T09:35:00+00:00Alternative 3D controllershttp://www.hackaday.com/2008/05/30/alternative-3d-controllers/http://www.hackaday.com/2008/05/30/alternative-3d-controllers/http://www.hackaday.com/2008/05/30/alternative-3d-controllers/#commentsFiled under:


There are several very nice 3D mice out there for navigating services like Google Earth or Second Life. 3Dconnexion for example makes a whole line of devices for 3D navigation. Their compact units offer 6-8 degrees of freedom with several customizable options. The company has an SDK available and many of their devices are natively compatible with Linux (or available for access through an XInput driver). So while that is all well and great, lets look at some alternative ways people are navigating 3D spaces.



We are glad to see it didn't take long for someone to figure out how not to get healthy with a Wii Fit. The German Research Center for Artificial Intelligence turned one unit into a global surf board. Using the Bluetooth connection of the Wii Fit they developed software to port the user's motion back into Google Earth. The result, surfing over the alps to 90s techno music. They also briefly demo using the balance board to walk in Second Life.



Why use any input at all when you can use your face? The Human Media Lab has developed software that allows for hands free navigation of Google Earth simply by moving your face. The software is free (although a download link is missing) and currently only available for Windows. They do appear to be using OpenCV as part of this package which is open source.



Lastly from the virtual world of Second Life we have navigating with your mind. This brain-computer interface (BCI) was developed by Japanese professor Jun'ichi Ushiba of Keio University in Japan. The user wears a headpiece that monitors activity in three areas of the motor cortex, where movement signals are processed. A user simply thinks about the direction they want to move and the avatar responds accordingly. Still under development, this device is aiming to recognize more complex movements and gestures in the future.
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]]>3d3dconnexiongoogleearthsecondlifeSean Percival2008-05-30T23:00:00+00:00mpguino: injector level fuel montoringhttp://www.hackaday.com/2008/05/29/mpgduino-injector-level-fuel-montoring/http://www.hackaday.com/2008/05/29/mpgduino-injector-level-fuel-montoring/http://www.hackaday.com/2008/05/29/mpgduino-injector-level-fuel-montoring/#commentsFiled under: , ,


[dcb] posted about his work on the mpgduino mpguino. The project uses an arduino with a LCD display to monitor fuel consumption based on vehicle speed and the pulses of the fuel injectors being fired. It's definitely an interesting project given current fuel costs and the passive nature of the project. You can easily tap the wires needed for the monitor and remove it without voiding your warranty (not that we really care).
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]]>efifuelfuel montoringFuelMontoringmpgWill O'Brien2008-05-29T07:03:00+00:00Hack your prius with prius batterieshttp://www.hackaday.com/2008/05/07/hack-your-prius-with-prius-batteries/http://www.hackaday.com/2008/05/07/hack-your-prius-with-prius-batteries/http://www.hackaday.com/2008/05/07/hack-your-prius-with-prius-batteries/#commentsFiled under:


Adding extra battery capacity to hybrids is becoming pretty common, but this one is better than the average lead acid trunk fest. The pack was built from three prius NiMH packs picked up from salvage yards. These batteries can't simply be bolted together, but with some research and effort you can save some nickel from the junk yards and cut your fuel bill.
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]]>batteriesbatterybmsevnimhpriusWill O'Brien2008-05-07T22:16:00+00:00