Hacked Gadgets Forum

September 18, 2014

MIT Cheetah Robot

at 6:20 am. Filed under Complex Hacks, Cool Gadgets, Insane Equipment

MIT Cheetah Robot_4

 

The MIT Biomimetic Robotics Laboratory has been working hard on the MIT Cheetah Robot. Deborah Ajilo, Negin Abdolrahim Poorheravi,John Patrick Mayo,Justin Cheung, Sangbae Kim, Shinsuk Park, Kathryn L. Evans, Matt Angle, Will Bosworth, Joao Luiz Almeida Souza Ramos, Sehyuk Yim, Albert Wang, Meng Yee Chuah, and Hae Won Park are members of the huge development team. Why so many team members? This is not a simply problem to tackle, as you read through their post you will see that there were a number of challenges that they needed to overcome in the development of the system.

Via: Evan Ackerman at IEEE Spectrum

“Now MIT researchers have developed an algorithm for bounding that they’ve successfully implemented in a robotic cheetah — a sleek, four-legged assemblage of gears, batteries, and electric motors that weighs about as much as its feline counterpart. The team recently took the robot for a test run on MIT’s Killian Court, where it bounded across the grass at a steady clip.

In experiments on an indoor track, the robot sprinted up to 10 mph, even continuing to run after clearing a hurdle. The MIT researchers estimate that the current version of the robot may eventually reach speeds of up to 30 mph.

The key to the bounding algorithm is in programming each of the robot’s legs to exert a certain amount of force in the split second during which it hits the ground, in order to maintain a given speed: In general, the faster the desired speed, the more force must be applied to propel the robot forward. Sangbae Kim, an associate professor of mechanical engineering at MIT, hypothesizes that this force-control approach to robotic running is similar, in principle, to the way world-class sprinters race.”

 

MIT Cheetah Robot_1

 

MIT Cheetah Robot_2

 

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August 6, 2014

Vintage Precision Power Supply Teardown

at 6:34 am. Filed under Insane Equipment

 

Our friend Dave from the EEVBlog took apart this Vintage Precision Power Supply. With a quick look at the front panel you might think this is something that you would have got from Radio Shack 40 or 50 years ago for your hobby kit but this is a 0.001% precision power supply! It was designed by Power Designs Inc of New York back in 1964. When you see the internals you will see lots of point to point wiring which was popular back in the day, these days you only generally see point to point components bodged onto cheap Chinese equipment. The condition of the internals is very clean considering the age of the device! Unfortunately a simple adjustment of the trim pots wasn’t enough to calibrate it. I am assuming that some of the crusty old caps are desperately needing replacement.


July 26, 2014

How OSB is Made

at 7:35 pm. Filed under Insane Equipment

 

We use OSB (oriented strand board) for many building projects these days as plywood is getting more expensive. The process of how it is made is quite interesting.

“Oriented strand board is manufactured in wide mats from cross-oriented layers of thin, rectangular wooden strips compressed and bonded together with wax and synthetic resin adhesives (95% wood, 5% wax and resin). The layers are created by shredding the wood into strips, which are sifted and then oriented on a belt or wire cauls. The mat is made in a forming line. Wood strips on the external layers are aligned to the panel’s strength axis, while internal layers are perpendicular. The number of layers placed is determined partly by the thickness of the panel but is limited by the equipment installed at the manufacturing site. Individual layers can also vary in thickness to give different finished panel thicknesses (typically, a 15 cm layer will produce a 15 mm panel thickness). The mat is placed in a thermal press to compress the flakes and bond them by heat activation and curing of the resin that has been coated on the flakes. Individual panels are then cut from the mats into finished sizes.”

 


May 30, 2014

Automatic Fire Fighting Foam Solutions

at 10:06 pm. Filed under Insane Equipment

 

Aircraft hangers are usually very large simple buildings that house millions of dollars worth of airplanes. A small fire can quickly damage the contents of the building. Fuel storage containers are pretty scary when they burn out of control. The key is to have a fast reaction to fire and hit it with an effective suppression material. These videos are interesting due to the large scale. I think they could rent out some of these hangers out as after hours foam rave clubs. :)

 

 

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March 10, 2014

Ping Pong Robot

at 10:28 pm. Filed under Complex Hacks, Cool Gadgets, Crazy Hacks, DIY Hacks, Insane Equipment

 

 If you hate when you don’t have a partner to play ping pong with you why not build a robot. Ulf Hoffmann is an industrial mechanic and has some creative ideas. His Ping Pong Robot (translated) is quite amazing, you can see it in action above. The videos below demonstrate the building blocks to get to where the robot is today.

Via: Laughing Squid

 

 


March 9, 2014

Drone with a 80KV Stun Gun

at 9:46 pm. Filed under Insane Equipment, What Were They Thinking

 

When you get tired of flying a regular hexcopter why not kick things up a notch and install a stun gun on the thing to protect your property!

“In the video above, CUPID (short for Chaotic Unmanned Personal Intercept Drone) takes down an intern. He doesn’t get up with ease.”

March 6, 2014

How the Fadecandy LED Controller is Made

at 5:47 am. Filed under Complex Hacks, Insane Equipment

 

Adafruit recently took on production of the Fadecandy project that Elizabeth Scott developed. The video above is How the Fadecandy LED Controller is Made using the automated PCB production machines. There are 3 basic machines in the equipment path, the panelized PCB goes through a solder paste machine where a laser etched stencil is used to put solder in just the right locations. The board is then moved through the pick and place machine where all of the components are automatically placed, and finally it rolls through a reflow oven where all of the parts are permanently soldered in place. Only thing to do after that is snap the board off and plug it into a test jig.

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