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geek learn tech

Watch this mesmerizing video of mechanical principles at work

The 19th century was a magnificent era of mechanical wonders. It was the time of Babbage’s differential engine and a time when Niepce created the first photograph. A time when Maxwell created the mathematical equations for the electrical and magnetic field paving way for Hertz to create microwaves in the lab.

Mechanical engineering was at its peak and many gears would calculate math formulas, or move your around or transform a rotating movement into translation on X or Y. The wonders of that era will stick with us for many years to come.

Check the video from below created by Ralph Steiner in 1930 about the mechanical principles. Square gears or triangle gears are definitively possible.

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tech

Build a gaming PC for under $750.


Jays2Cents helps us again with tips and tricks in buying a new gaming pc that is under $750. It is not the best in town, but it does the job. You can play the games that are sold today and you can be happy for one year from now on.

Here is the config JayzTwoCents has created:
CPU: AMD Athlon X4 860K
Cooler: Hyper 212 Evo
Mobo: Gygabyte F2A88X-UP4 FM2+
RAM: G.Skill Sniper Series 8GB
HDD: Seagate Barracuda 2TB
PSU: 550W Seasonic G
GPU: Powercolor R9 270X Devil
Case: Corsair Graphite 230T
Optical: Lie-On DVD-RW
Total $720.14

My dream gaming pc costs more like $1500 and I wrote about it in the blog post about the dream gaming pc.

Also, here is the image with the specs:
build-gaming-pc-under-750-2014

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geek learn science tech

Robert Goddard, the original rocket scientist


SciShow space takes us through a journey into Robert Goddard’s life, the original rocket scientist. He was the first one to say that you do not need air to move a rocket around. He told everyone that you could use a rocket in space and he was ridiculed at first.

Then he invented a liquid fuel rocket and it worked. His latest liquid fueled rocket motor would propel the rocket up to more than 1 mile high, which was enormous by the accounts of that time.

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geek learn science tech

ESA has landed a robot on comet 67P – a worlds first


OK, this is the most awesome thing you’ll hear this year: ESA, European Space Agency, lanched the Rosetta spacecraft 10 years ago and on Nov 12th 2014, 16:00 GMT, was able to land the robot called Philae on comet 67P/Churyumov-Gherasimenko. That is the first time in human history when a spacecraft traced and orbited a comet and when it has landed a robot on a comet.

On a freaking comet!!!

What want the guys at ESA to find out in there? If there are organic compound on the comet, to take lots of selfies with Rosetta and to take lots of pictures from the ground of the comet. Of course, the robot will analyze the ground and check what elements are in there too.

Say what you want, but this it the greatest news ever in my lifetime!

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tech

Science Fun: some images to make you laugh

mars-milky-way
via Mr. C

split-the-atom
via ASAP Science.

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learn tech

The accidental discoveries were not so accidental


well, it is a known fact that people love accidental discoveries, but few know that those discoveries, though they seems to be the result of chance, were, in fact, a set of circumstances that would’ve ultimately led to the given discovery. that means that if the Curie family would not have worked with radioactive materials, they would not have discovered radioactivity.

Also, penicillin was discovered when the mold in a lab was not present near this substance. And all because a keep researcher wanted to find something related.

So called accidents were the discovery of the purple color, called by Perkin mauve. In 1878 Constantin Fahlberg discovered saccharin, in 1930 Roy Plunkett discovered teflon, Bill and Bob Gore invented goretex using teflon as starting point,

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geek learn tech

Inside look on how the Tesla S model is manufactured

The guys at Interesting Engineering have found some great videos that show the insides of the Tesla factory. You get to see how they use robots to do a lot of the work in the factory and how they build the cars.

The S model is a great electric car that I would like to buy in the future, but for now it remains a dream. In any case, the Tesla S model looks great even when it does not have the paintjob done. They thought of a ton of details and I love the touchscreen.

also, a great feature of this car is the fact that you can get upgrades via the internet. That’s more like a robo-car instead of electric car to me.

Now, let’s see the videos!

How the model S is made, part I

Now see part II:

And here is part III:

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geek learn tech

Haptotime – Feel virtual objects with a floating touchscreen


New Scientist reports that a device was invented that lets you touch virtual objects using a floating touchscreen. Using ultrasounds the device created areas of pressure and your fingers can feel those areas as you feel the press of a button. Once you put your finger in a given position you feel the virtual button, but also trigger a command, in the same way you would do with a keystroke.

And all this is done using sound waves at high frequencies. Now, that is cutting edge science 😀 Yasuaki Monnai and his team at the University of Tokyo have created a virtual screen you can feel. Called HaptoMime, it uses reflective surfaces to create a holographic display.

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learn tech

How were the pyramids built?


The pyramids from Egypt were build using workers that were paid for their labor. They would use a giant sled to carry the lime rocks to the place where the pyramids would be built. The workers would pour water in front of the sleds to make them slide smoother on the sand.

Also, the big lime rocks were cut by using water, some abrasive material and a copper saw. The rocks were pushed up a ramp that would be built on the lower levels of the pyramids. It was better this way as the alternative, building a straight ramp that goes to the top of the pyramids, would require more material than the pyramid itself.

The Gizeh pyramid is 140 meters tall, it took 2 million stones to build it and each such stone has 130 tons. It took 20 – 30 years to make such a pyramid, but they were and even today could be a spectacular view if they would still have their white limestone cover and the golden tip.

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geek tech

Beginners guide to motherboards and what is a chipset


JaysTwoCents teaches us how to choose the motherboards more intelligently. Firstly, you need to decide what processor you will be using since the motherboards are strictly tied with the type of processor you want to use.

In the example above, if you want to use an Intel i7 5960X processor, then you need to use a motherboard like Asus Deluxe X99, which supports this processor, but which also has 8 slots for DDR5 RAM, 5 PCI-E slots, tons of USB 3.0 slots, a ton of other SATA 3.0 @ 6Gbps and also an M2.0 slot for an SSD.

Whenever you choose a motherboard you need to make sure you do not overspend on one where you won’t use it at its full capacity. If you’re an overclocker, then X99 Deluxe is your type, if not, then you can choose a lower end motherboard.

As a basic requirement for any new gamer you would need to look for a motherboard that supports:
– at least Intel i7 5960X or AMD FX 8370
– DDR4 – put 16GB in there

Then you can couple those with a nVidia GTX 980 video card or ATI R9 290X.

Also, what is a chipset? It is a set of two chips on a motherboard that control the way the pieces communicate with each other. Linus will explain what it is: