Coolant Hose Grippers Keep Your Components in Place

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Whether you have shaky hands when working on tiny components, or just need more control and flexibility, we think this “third hand” gripper using coolant hose is an ingenious solution compared to the little metal ones you can buy.

Not surprisingly this isn’t an original idea. In fact, Sparkfun actually sells it as a kit. That being said… it’s rather expensive — especially when you can build [Frank Zhao's] version for less than $15.

He’s using a cutting board, three machinery style coolant hoses, and a handful of fasteners from the hardware store. You can use the accessories from a regular metal third hand, but [Frank] also shows us how to recreate them using a few washers, some steel strapping, and a wing nut and bolt.

[Mr. Zhao] is no stranger to Hack a Day either — we’d almost call him an inadvertent contributor we’ve shared so many of his hacks! Just take a look at his tiny USB business card, his awesome LED pocket watch, a detailed reflow oven build, or even his IR based augmented reality setup.

[Thanks Keith!]

Hot or Not? Find Out How to Calculate Component Heat and Why You Should

How hot are your key components getting? There’s a good chance you’ve built a project and thought: “Well I guess I better slap a heat sink in there to be safe”. But when working on a more refined build you really need to calculate heat dissipation to ensure reliability. This is actually not tough at all. The numbers are right there in the datasheet. Yes, that datasheet packed with number, figures, tables, graphs, slogans, marketing statements, order numbers… you know right where to look, don’t you?

Hackaday has you covered on this one. In under 10 minutes [Bil Herd] will not only show how easy these calculations are, he’ll tell you where to look in the datasheets to get the info you need quickly.

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Retrotechtacular: Hacking Mother Nature’s North Temperate Regions

…because they’ll tickle your insides! Seriously, don’t eat them if you happen to parachute alone into wilderness and must survive without firearms or equipment like our protagonist here. This 1955 US Navy-produced gem of a training film will show you how to recognize, procure, and prepare many kinds of nutritious plant, insect, and animal life commonly found between 45° and 70° north latitude.

While you hone your large game hunting skills, you can tide yourself over with all kinds of things that will just sit there ready to be plucked for your nourishment: many berries and fruits, nuts, moss, lichens, and the inner bark of several kinds of trees is edible. Sate your taste for savory with grubs, termites, or grasshoppers. When in doubt, eat what the birds and small animals are eating, but stay away from mushrooms. It’s too hard to distinguish the poisonous varieties.

Many edible things are found in and around bodies of water. Game such as deer, ducks, and birds are attracted to water and make their homes near it. Various kinds of traps made from twigs and vegetation will outwit rabbits and squirrels. You can fashion a bow and arrow in order to kill large quadrupeds like deer, elk, and ram. It’s best to aim for the head, neck, or just behind the shoulders as these are the most vulnerable areas.

Once you have killed a large animal, prepare it for cooking by draining its blood and removing its entrails. There are many ways to cook your spoils of survival, and most of them involve cutting the meat into small pieces first. Hopefully, you have some basic tools for starting fires.

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DIY Router Base For Your Dremel

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Dremel rotary tools are handy. Some of the attachments are convenient.  [vreinkymov] felt the convenience wasn’t worth the cost, so he decided to make a Router Base for his Dremel. These types of attachments are used to hold the Dremel perpendicular to the work surface.

Underneath the little nut/cover near the spindle of the Dremel, there is a 3/4″-12 threaded feature used to attach accessories. A quick trip down the hardware store’s plumbing aisle resulted in finding a PVC reducer with the correct female thread to fit the Dremel. Once on the rotary tool, the reducer threads into a PVC nipple that is glued to a piece of acrylic. The acrylic acts as the base of the router attachment.

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Cheap, Resourceful DIY Mini CNC Router/Mill Contraption

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Few Hackaday Readers would disagree with the classic phrase: Necessity is the mother of invention. That statement is certainly no exaggeration when it comes to this mini 3-axis CNC Machine. The builder, [Jonathan], needed a way to prototype circuit boards that he designed. And although he admittedly doesn’t use it as much as he intended, the journey is one of invention and problem solving.

[Jonathan] started from the ground up with his own design. His first machine was a moving gantry style (work piece doesn’t move) and ended up not performing to his expectations. The main problem was alignment of the axis rails. Not becoming discouraged, [Jonathan] started on version 2. This time around the work piece would move in the X and Y directions like a conventional vertical milling machine. The Porter-Cable laminate trimmer would move up and down for the Z axis. It is clear that the frame is built specifically for this project. Although not the prettiest, the frame is completely functional and satisfactorily stiff for what it needs to do.

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7-Foot DIY Wind Turbine Proves Size Matters

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When [brokengun] decided to build a 7 ft diameter wind turbine, he had no idea how to even start, so he did as most of us would do and read some books on the topic. His design criteria was that it would be simple to construct and use as many recycled parts as possible. This wind turbine charges a 12 volt battery which can then be used to power a variety of gadgets.

Although made from recycled components, this isn’t a thrown together wind turbine. A lot of thought went into the design and build. [brokengun] discusses matching the blade size to that of the generator in order to maximize power and efficiency.  The design also incorporates a feature that will turn the turbine perpendicular to the wind if the wind-speed gets to high. Doing this prevents the turbine from being damaged by strong gusts.

For the main support/hub assembly, a Volvo 340 strut was used because they are widely available, cheap and known for being long-lasting. The tail boom is made from electrical conduit and it’s length is determined by the size of the main fan rotor. The tail vane is made from steel sheet metal and its surface area is also dependent on the fan rotor size to ensure that the turbine functions properly. The blades are made from wood but instead of making them himself, [brokengun] felt these were worth ponying up some cash. [brokengun] also scored a 30 ft high lattice tower an airport was getting rid of. This worked out great as it’s just the right height for a turbine of this size.

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Robot Dominates Air Hockey, Frightens John Connor, Wayne Gretzky

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We’ve all been disappointed at some point in our lives after yearning to play air hockey and not finding anyone to play against. This is no longer a problem at [Jose]‘s house. He has built a very amazing Air Hockey Playing Robot. This robot moves in 2 directions, can predict the movements of the puck and also decide to block, shoot or a do a combination of both.

Surprisingly, most of the ‘robotics’ parts are 3D printer left overs, which includes: NEMA17 stepper motors, an Arduino Mega, a RAMPS board, motor drivers, belts, bearings and rods. The bracketry, puck and paddle are all 3D printed. The air hockey table itself was built from scratch using off-the-shelf wood. Two standard 90mm PC fans are all that are responsible for creating the air pressure used to lift the puck. A PS3 camera monitors the action and is literally this robot’s eye in the sky.

Check out the video and learn more about this project after the break.

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