4 July, 2008

12 channel LiFe battery management system

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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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Source: Will O'Brien

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1 July, 2008

British Steam Car

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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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Source: Juan Aguilar

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26 June, 2008

Kawasaki KZ440 electric conversion

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[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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Source: Eliot Phillips

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22 June, 2008

Motorcycle throttle bodies for your car

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[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.

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Source: Will O'Brien

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19 June, 2008

The Price of His Toys returns

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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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Source: Juan Aguilar

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16 June, 2008

Electric recumbent bicycles

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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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Source: Juan Aguilar

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Geo Metro halved for better mileage

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[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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Source: Eliot Phillips

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11 June, 2008

Hubless inline skateboard

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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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Source: Juan Aguilar

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9 June, 2008

Steven Laurie's Art of the Motor

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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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Source: Juan Aguilar

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6 June, 2008

Wheels and weed whackers

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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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Source: Juan Aguilar

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1 June, 2008

Powered bicycles

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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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Source: Sean Percival

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Picaxe tachometer

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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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Source: Will O'Brien

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31 May, 2008

Digidash: digital dashboard for megasquirt

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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. (The lack of hardware info irritates me: I want one.)

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Source: Will O'Brien

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Alternative 3D controllers

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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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Source: Sean Percival

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29 May, 2008

mpguino: injector level fuel montoring

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[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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Source: Will O'Brien

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8 May, 2008

Hack your prius with prius batteries

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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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Source: Will O'Brien

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Maker Faire 2008: Electric motorcycles

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Builder [Justin Gray] brought a pair of electric motorcycles to Maker Faire last weekend. Pictured above is the R84, which has 28 LiFePo cells and an 84v AC induction drive providing 54HP. All of that is stuffed in a 2000 Yamaha R1 frame. You can buy it now for $14,000.
The second bike is dubbed the R144. It's a144v DC system with 48cell lithium power supply driving a 60kw series motor.

[Justin]'s other passion is building fire robots like Libby pictured below.

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Source: Eliot Phillips

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28 April, 2008

EFI your motorcycle

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This one's In honor of my new project bike. [wildwestsyndey] converted his Suzuki DR 350 from the stock carbs to EFI using the megasquirt EFI controller and a custom machined throttle body. You can find a few pictures of the conversion here. To handle the ever annoying need for a high pressure fuel pump, he adapted an in-tank scooter pump with a machined mini-reservoir to fit in-line with the original tank. For more motorcycle builds, check out the megasquirt success stories forum.

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Source: Will O'Brien

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16 April, 2008

Electric (off-road) skateboard

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[Joe] sent along this sweet little instructable on making an electric skateboard. I like this one especially for the how-to nature of the build. [Vurp] used an off the shelf mountain board with a brake addition, a 300w scooter motor/controller and a pair of 12v SLA batteries. Now that I'm back on campus, I might just be tempted to build something along these lines. Just in time for this electric vehicle post, [Darin] sent in the forkencycle.

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Source: Will O'Brien

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2 January, 2008

Inexpensive MPG modding

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[basjoos] modded [via] the body of his '92 Honda Civic - and managed to improve his fuel efficiency from 50-60MPG up to 95MPG for about $400. Even more interesting is the SuperMID (Translated) that he added to the car to monitor his fuel efficiency. It's based on an ATMega8 that reads the CAN bus and displays realtime MPG information an a character LCD. The SuperMID is popular for Prius modders because the on-board display maxes out at a paultry 99MPG. If micro-controller's aren't your thing, [Atilla] put together his own CAN bus decoder and ported his code to a Zaurus SL-C700. He even added voice feedback notification for certain data events.

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Source: Will O'Brien

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18 December, 2007

Nightvision car heads up display

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[alti] wants night vision for his car, so he picked up a nightmax night vision camera that has a built in LCD. The plan is to mount the display so that it will reflect off the windshield of his car to create a simple HUD. Unfortunately the image gets reflected from the inside and outside of the windshield. The discussion in the forum is getting pretty lengthy, but it's an interesting project.

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Source: Will O'Brien

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7 November, 2007

inexpensive PIC based OBD-2 interface

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OBD-II became the mandatory I/O diagnostic port on cars starting around 1996 in the US. Considering that the interface consists of a couple of I/O lines, serial/usb adapters have been ridiculously expensive for quite a while - especially newer USB versions. [Renan] sent in this PIC18F2450 OBD-II interface. The designer says he can provide boards for just over $6 and programm