Electric Go-Kart Made From Off The Shelf Components

Eletctric go kart
What would you do with a catalog of parts and a nice budget? [Ben Rothschild] decided to build an electric go-kart from scratch, for a contest he’s trying to win.

He designed the entire go-kart in 3D CAD using off the shelf components to speed up assembly. The frame is made of aluminum extrusion with t-bolt brackets, and he’s using modified FIRST Robotics wheels with standard #25 chain and sprockets.

Two 1850W Turnigy SK3 brushless motors make up the drive system, equivalent to almost a 5HP engine — except with a constant torque profile, meaning it’ll have no problem going up hills at 3km/h or 30km/h, no gearing necessary! To power the beast he’s using four hard-shell LiPo batteries (4S1P), which are rated for 14.8V and 5Ah. Two el cheap-o 24V 500W speed controllers (slightly concerning) provide the control system, which he may plan to upgrade in the near future.

The test drive video is a bit short, but it looks like with a bit more work this go-kart could have a lot of potential!

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Home Made Cargo Bicycle Makes Use of Scraps!

Recycled DIY Bicycle!

Ever heard of a cargo bike? If you need to carry a lot of stuff around (or maybe even your kid!), then they’re super handy — unfortunately, they aren’t exactly cheap — or common. So you could just make your own…

[Matthew Venn] was inspired by Tom’s cargo bikes, recently featured in issue 12 of Boneshaker magazine. He collected a few scrap bicycles, some steel, and started fabrication — lucky for him, his friend [Eric] has a full metal working shop complete with plasma cutting, MIG welding, and a lathe.

They started by cutting the front end of the bicycle off and replacing it with a much longer steering column. This connects to the only new part they had to buy — a pair of Ford Escort tie rods, which allow you to steer the tiny front wheel. They continued welding the rest of the frame together, testing it as they went — once satisfied with its handling (it still needs brakes) they built the cargo platform and called it a day.

There’s a complete gallery of the process over on [Matthew's] Flickr, so if you’re hoping to make your own, take a gander!

Intelligent Roadways Pave Way To The Future

smart roadway with illuminated tiles

The idea of a road is relatively simple – a durable path from point A to point B. Development of roadways usable for wheeled carriages has been perfected over the centuries. The Romans, for instance, used a base layer of crushed limestone that would let water flow out, preventing clay soil from turning into mud. Some Roman roads were topped with six sided capstones, also known as pavers, many of which still exist today.

The invention of the horseless carriage necessitated roadways that could be used at high speeds. Tarmac, asphalt and concrete roads followed, and thus ends our short venture into the history of roads. Roadways simply haven’t changed much since then. Sure, we’ve painted some lines on them, even etched grooves in some to prevent accidents, but the core technology of the road is the same as it was a hundred years ago. Until now. Consider the Intelligent Roadway.

[Scott] is an electrical engineer, and had dreamed of solar powered roadways as a child. But it wasn’t until the realization of global warming did [Scott] and his wife, [Julie] start to take the concept seriously. Stick around after the break to find out just how smart [Scott's] roadway of the future is.

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Koenigsegg 3D-Printing for Production Vehicles

Koenigsegg with Printed Parts

We’re not surprised to see a car manufacturer using 3D-printing technology, but we think this may be the first time we’ve heard of 3D-prints going into production vehicles. You’ve likely heard of Christian von Koenigsegg’s cars if you’re a fan of BBC’s Top Gear, where the hypercar screams its way into the leading lap times.

Now it seems the Swedish car manufacturer has integrated 3D printing and scanning into the design process. Christian himself explains the benefits of both for iterative design: they roughed out a chair, adjusting it as they went until it was about the right shape and was comfortable. They then used a laser scanner to bring it into a CAD file, which significantly accelerated the production process. He’s also got some examples of brake pedals printed from ABS—they normally machine them out of aluminum—to test the fits and the feeling. They make adjustments as necessary to the prints, sometimes carving them up by hand, then break out the laser scanner again to capture any modifications, bring it back to CAD, and reprint the model.

Interestingly, they’ve been printing some bits and pieces for production cars out of ABS for a few years. Considering the low volume they are working with, it makes sense. Videos and more info after the jump.

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The p.u.l.s.e Parking Light

Pulse[Anool]‘s brother loves his motorcycle, and when he came across a ‘breathing LED’ mod for the brake light, he had to have one. Being tasked with the creation of a pretty cool mod, [Anool] came up with p.u.l.s.e., an extremely small LED controller and a slight tip ‘o the hat to Pink Floyd and the second or third greatest CD packagings.

The circuit is a slightly Apple-inspired mod for the  parking light that keeps the lamp fully lit when the Neutral Detect line on the bike is high, and slowly pulses the LED in a ‘breathing’ pattern when the Neutral Detect line is low. Not a lot of logic is needed for something this simple, so [Anool] turned to the ATtiny45 and the Arduino IDE to accomplish his goal.

[Anool] created a circuit in KiCAD that would plug in to the lamp socket of his brother’s bike. A cluster of LEDs replace the T10 lamp inside the parking light, and a small amount of code takes care of the logic and breathing effect. It’s a great mod, and the astonishingly small size of the board puts him in the running for the smallest Arduino we’ve ever seen.

Videos of the light in action below.

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Retrotechtacular: ROTOPARK is a Futuristic Parking Structure from 40 Years Ago

retrotechtacular-rotopark

Pictured above is a functioning model of an automated underground parking structure which was built and used, but obviously it never caught on widely. That makes us a bit sad, as it removes the need to find an empty parking spot every time you use the garage; and having a robot park your car for you seems very future-y.

The gist of the ROTOPARK system is a carousel and elevator system for parking cars. just drive into a single-stall garage at ground level, take your ticket, and walk out the people-hole. The garage stall floor is a sled which moves down an elevator (shown as blue stalls on the left half of the image) to be stored away in the rotating carousels of cars.

Obviously mechanical failure is a huge issue here. What if the elevator breaks? Also, at times of high traffic we think getting your vehicle back out of the system would be quite a bit slower than the “static” parking garages we’re used to. Oh well, maybe some day. Check out the classic marketing video after the break which shows off the concept, construction, and use of the system.

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Jackal takes it to the streets

jackal

 

[Nick Thatcher] is becoming the world’s authority on self-balancing unicycles.  He’s unveiled The Jackal, his new single wheel vehicle. The Jackal is an upgrade to The Raptor, [Nick's] 2012 machine. The wheelbarrow wheel has been replaced with a much more fitting model sourced from a motorcycle. The 19″ motorcycle wheel improved balancing quite a bit. Wheelbarrow wheels were not exactly quality components, so they definitely made balancing the unicycle more difficult.

[Nick] upgraded his power system as well. The Jackal is powered by a 450 Watt 1020z geared motor. The 1020z is often found on scooters imported from the Far East. The motor controller  is the same SyRen 50 Amp continuous / 100 Amp peak  model used in the Raptor.

The Jackal’s frame has also seen some changes. It’s now sporting quite a bit of machined aluminum as well as [Nick's] standby PVC.  The upgrades have paid off in performance. The Jackal can reach about 20 MPH, however the top safe speed is closer to 15 MPH.

Click past the break to see [Nick] demonstrating The Jackal at Makerfaire UK.

[Read more...]

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