Transportation Hacks

1549 Articles

DiY Bike Roller

DIY Bicycle Roller Helps Cure The Winter Blues

December 20, 2014 by 46 Comments

Winter’s a-brewing and that is a downer for the everyday cycling enthusiast. There are certainly ‘bike trainers’ out on the market that will let you ride in your living room but they clamp to (or require replacing the) the rear axle. These bike trainers hold the bike in an upright position so that the rider can’t tip the bike and might feel a little boring for some. There is another indoor biking solution called a bicycle roller which is, just as it sounds, a few rollers on the ground that the bike wheels rest on and is not attached to the bike by any mechanical means. When the rider pedals the bike, the bike wheels spin the rollers. Even with the lack of forward momentum the spinning of the wheels is enough for the rider to stay upright.

[Sky-Monkey] wanted to bike during inclement weather and felt that a bike roller was simple enough for him to try building one. He likes building things and already had all the necessary parts kicking around his shop. The rollers are standard 3″ PVC pipe with plywood discs pressed into each end. The discs are counter-bored to accept standard skate bearings. Off the shelf steel rod make up the axles. The 3 rollers and axle assemblies are mounted in a wood frame made from dimensional lumber. It’s important that the front bike wheel also spins so [Sky-Monkey] made a power transmission belt out of cloth strap that spins the front roller with the rear.

The result is a fully functional bike roller that only cost a few hours of time to make. Video of this puppy in action after the break….

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Amateur Builds Super Deep Super Cheap Ocean Vehicle

December 19, 2014 by 41 Comments

During the summers [Doug] has been building a 75 foot sailing junk to be launched from America’s most inland port. When Oklahoma’s winter hits he heads indoors to work on an ROV that will prowl 3,000 feet below the surface. Originally building a piloted submarine, he grew bored and decided to use the sailboat as a carrier for his fleet of remote submersibles instead.

A consummate amateur, [Doug] is the first to admit how little he knows about anything and how much he enjoys the open source spirit: collaboration, cooperation and learning from others. Determination and hard work fills in everything in between.

Hackaday covered the beginnings of his ROV last winter. In the year since it has progressed from some sketches and a 10″ steel pipe turned into a pressure testing rig to a nearly-complete, 10 foot long,  custom-lathed 4″ aluminum torpedo laying on his shop table. In a bow-to-stern walk-through [Doug] shows how he is building science equipment for less than a penny on the dollar by using largely off-the-shelf imaginatively-repurposed parts or things he could fabricate himself with only a lathe and a 3d printer.

Continue after the break for a breakdown of the tech used.

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Edge Lit Plastic Bike

Edge-Lit Clear Plastic Bike Combines Nighttime Riding Safety With Aurora Borealis Flair

December 18, 2014 by 8 Comments

Several years ago [dan] saw some plastic frame bikes designed by MIT students. Ever since he saw those bikes he thought it would be cool to make an edge-lit plastic framed bike.

The frame is made from 1/8″ and 3/8″ thick polycarbonate sheet. The parts were designed with tongue and grooves so they fit together nicely. The joints were glued to hold everything together. Holes were drilled in the edge of the plastic large enough to fit an LED. Once the LED was inserted in the hole, it was wired up and secured with hot glue. There are about 200 LEDs on the bike, powered by a constant current LED driver circuit that [dan] designed specifically for this project.

The build process was certainly not flawless. For example, the plastic holding the bottom bracket (where the crank and pedals attach) broke. This can be avoided by increasing the amount of material in that area prior to cutting out the pieces. [dan] was able to fiberglass his broken parts back together.

[dan] admits that the bike is heavy and a little wobbly, but is definitely ride-able. He did us a favor and made all his CAD files available to anyone that wants to make one themselves. If polycarbonate is too expensive for your blood, check out this bike make from cardboard.

Air Hoverboard

A Simple Hoverboard Everyone Can Understand

December 12, 2014 by 31 Comments

To be honest, we were wondering when we would see someone try this…

[Ryan Craven] has successfully built a working hovercraft that looks like a skateboard. It floats on two pockets of air generated by four Black and Decker leaf blowers — and by golly, it certainly looks like it works!

Ever since the HUVr hoax earlier this year, [Ryan] has had the goal to make a real, working hoverboard. Hendo may have beaten him to the punch with their $10,000 eddy current inducing halbach array board, but alas, it only works on copper or aluminum floors. [Ryan’s] can be used anywhere a normal skateboard can be. It’s far from sleek, but it’s only just the prototype — though we’re curious to see how far this could actually go.

Which is precisely why he’s shared it over on Hackaday.io and is hoping to draw some support and ideas from our wonderful community here.

What do you guys think? Is it worth continuing the pursuit of a hovercraft style hoverboard? Can we shrink the technology enough to make it feasible? It’s come a long way from the classic hover craft using a giant shop vac…

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extending an ebike

Extending The Range Of An Electric Bike

December 6, 2014 by 19 Comments

Cruising around town on your electric bike is surely a good time…. unless your bike runs out of juice and you end up pedaling a heavy bike, battery, and motor back to your house. This unfortunate event happened to Troy just one too many times. The solution: to extend the range of his electric bike without making permanent modifications.

Troy admits his electric bike is on the lower side of the quality scale. On a good day he could get about 15 miles out of the bike before it required a recharge. He looked into getting more stock battery packs that he could charge and swap out mid-trip but the cost of these was prohibitive. To get the extra mileage, Troy decided on adding a couple of lead-acid batteries to the system.

The Curry-brand bike used a 24vdc battery. Troy happened to have two 12v batteries kicking around, which wired up in series would get him to his 24v goal. The new batteries are mounted on the bike’s cargo rack by way of some hardware store bracketry. The entire new ‘battery pack’ can be removed quickly by way of a few wing nuts.

Connecting the new batteries to the stock system go a little tricky and the stock battery pack did have to be modified slightly. The case was opened and leads were run from the positive and negative terminals to two new banana plugs mounted in the battery pack’s case. The leads from the new batteries plug right into the banana plugs on the stock battery pack. The new and old batteries are wired in parallel to keep the voltage at 24.

Troy found that he’s getting about twice the distance out of his new setup. Not to bad for a couple on-hand batteries and a few dollars in odds and ends.

Self balancing chopper

Self Balancing Vehicle Inspired By Bicycles Of Yesteryear

November 16, 2014 by 23 Comments

[XenonJohn] is not a newcomer to the world of self balancing vehicles. He was part of the Medicycle team and a semifinalist for The Hackaday Prize. Working on the Medicycle had exposed some opportunities for improvement of the design, the most significant being the single wide wheel supporting the vehicle and rider. The unicycle design was more difficult to learn to ride than that of a two-wheeled nature. [XenonJohn] wanted to make an improved self balancer and this new one will have two wheels that are independently controlled.

Although the finished product looks like it started with a bike frame, the self-balancer’s frame is actually completely custom. The handlebars and banana seat were purchased new as aftermarket parts for old-style bicycles. Powering the two wheels is a pair of 24v brushed motors, conveniently each one came with a 6:1 reduction gearbox pre-installed. The wheels are a complete compilation of parts not intended to go together. The BMX bike rims were laced to mountain bike front hubs. The hubs have provisions for a disk brake but [XenonJohn] mounted a large toothed pulley there instead. A belt then connects the drive motor gearboxes to the pulleys completing the drive train.

The LiFePO4 battery kit was purchased off eBay and puts out 24v and 15AH using eight cells. These batteries alone were a hefty percentage of the projects cost, costing nearly $300. Controlling the vehicle is an Arduino Mega that makes use of the FreeSix IMU library. The Mega receives inputs via I2C from a Sparkfun SEN-10121 board that contains both accelerometers and gyroscopes along with turn switches connected to the ‘brake’ levers on the handlebars. The Arduino then sends commands to the 25 amp Sabertooth motor controllers to keep you balanced as you buzz around town.

Video below.

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Surfing Around On A Self-Balancing Cloud

November 13, 2014 by 18 Comments

Throughout time it’s just been plain cool to genie around from point A to B on some form of personal portable hardware. Understandably so, it was the goal of [Dane Kouttron] to modify and improve the common standard in such a way that anyone could hop on his board and ride without a period of flailing to keep balance. In his Flying Nimbus project, the rider floats aloft a single power-driven wheel that will even do the balancing bit for you.

Inspired by some interesting aluminum scraps and an old 3 phase DC servo driver, [Dane] starting conjuring ideas of combining the two in order to produce his own self balancing form of transportation. A chunky reused tire from a local go-kart track turned out to serve as his wheel of choice which would mount between the feet of the rider. After ordering a 48v hub motor and waiting for it to make its way over from China, [Dane] took the time to model all of the individual parts, motor, and wheel in CAD to figure out the needed measurements for the custom pieces he’d later fabricate to fit around them. The aluminum frame that the rider stands upon not only houses and conceals the power cells and electronics running the central wheel, it also illuminates white light from the sides to stand out at night. Along the road of troubleshooting, [Dane] eventually scored a complementary top-notch servo drive from AMC, who ultimately wanted to see his project rolling as badly as he did. There is a load of detailed documentation on the layers of problem solving that went into the project on his blog, as well as more on the hardware used by [Dane] to get the board actively balancing. Seeing the final product should further enforce that there is no better way to get around then on the likes of something you made yourself:

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