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Shadoof

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About Shadoof

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  1. Not that long ago I came up with a fun project idea when I was bored. I had some spare speakers laying around and felt like a fun thing to do would to add them to my current speaker system to help fill the room with sound better. To do this I drilled small holes in the back of my current computer speakers and then connected some wire in parallel, I then ran this wire through the ceiling and then soldered the leads to the speakers. By connecting them in parallel I reduced the resistance of the circuit but I also increased the current, thanks Ohms law! I thought this was all good, but then my da
  2. Shadoof

    Football to the Face

    On a youtube channel that you may have all seen at one time or another they have made a video about throwing a soccer or football at somebody's face. This channel, called The Slow Mo Guys, records things in slow motion. In this video they show a face getting hit by a soccer ball in supper slow motion. The cool thing about this is that you can see the inertia that the head holds and its resistance to movement from the soccer ball. The other cool thing that you can see in super slow motion is that the energy the ball has goes from kinetic energy, as its moving, into potential energy, as the air
  3. Shadoof

    Flopotron

    A mad scientist over on youtube has made a monstrosity of an instrument, it is made of 2 scanners, 8 hard drives, and 64 floppy drives.... 64... The reason for all of these strange electronic parts is so that the creator can play many different songs. Now how do you get these parts to sing the sweet sound of music. Well first off what is music, it is a bunch of frequencies all put together to create harmonies that sounds good to the ear. This is exactly what the flopotron is doing, each drive bay is set to a specific frequency and the program that he writes detects the frequency in the so
  4. Love the show, its a brave feat trying to explain what happens in the show...
  5. Shadoof

    NFC

    In most modern smartphones there is a feature called NFC, which is short for Near Field Communication. This tech uses electromagnetic induction with two loop antennas and the information is transferred on a radio signal in the 13.56 MHz band. If a device approaches another device this is called peer-to-peer sharing and both of the devices generate RF fields to transfer data. But in the case of a NFC tag, the tag does not have its own power supply, therefore it uses inductance from the active device and then transfers a RF signal. There are many applications for this technology that anybod
  6. Sounds fun, maybe I should wear my hat more often!
  7. Shadoof

    PolyMagnets

    In the E&M course we learned that there can never be a mono pole of a magnet. We can tell this because of Gauss's law for B-field. But a company has found a way to print different poles on the same surface, they do this by printing what they call "maxels" onto the surface of a magnet. The different applications for these could be magnets that attract to a certain distance and then repel once closer together. They can also make "short-throw" magnets that are extremely strong but only attract a few centimeters from the surface of the magnet. It is hard to explain everything that these magnet
  8. Eh, you aren't that experienced, you are good enough.
  9. Huh I didn't know that the paper on the outside would act as a wick, I always thought that the reason the wick didn't immediately burn on a normal candle is because it is surrounded, guess that is not the case.
  10. Very interesting, I always find optical illusions cool.
  11. Shadoof

    Fly System

    The High School recently put on a musical production called The Addams Family, for stage crew we had to build the set which includes something called a fly system. On this production we had many parts of the set on the system in order to fly them in and out. For instance one of the bars held an entire wall that was used as a backdrop that would only let in small spots of light to resemble stars. This was moved often as the scene changed from inside to outside a lot. The way that the fly system works is a set of counter weights that offsets the weight of whatever is on the bar. As yo
  12. Shadoof

    MRI machine

    I recently saw a video of an open MRI machine, I didn't know that there is one magnet that just spins really fast on the inside along with other equipment. It's amazing that it's perfectly balanced so it doesn't tear itself to pieces.
  13. Another crazy creation from Boston Dynamics is the Sand Flea. This little robot has the ability to jump, very high. the 11 pound, or 4.99 kg robot has the ability to jump 30 feet in the air, or 9.14 meters. Using potential energy we can calculate the energy needed to launch the robot. Using mgh we can see that the robot outputs 446.96 Joules of energy for a full height launch. Also assuming that no energy is lost the launch velocity of the bot is about 13 m/s. Boston Dynamics say that the robot can launch about 25 times, giving the total energy within the robot to be about 11174 Jou
  14. Quite recently Boston Dynamics made another cool looking robot that is built with two legs and runs on wheels. In order for this robot to be able to move around without falling over. The ability to not fall over is helped by inertia and the very complex computers within the robot allowing for many calculations to be made in order to put the robots weight in exactly the right spot. What is the most surprising thing about this robot is it's ability to jump completely autonomously. It is able to detect an object in front of it and make the correct calculations to jump the object and safely l
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