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    Electromagnetism

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    Congratulations to shabaz  for Measuring Electromagnets - the Magneto Mutant Magnetic Measurement Meter (MMMMM-1000)abg123 for Flipping Core Memory Bits Directly With a Magnetic Stylus, and dougw  for The KLINGMAGON Subspace Probe!  You are the Winners of  Electromagnetism  competition from Project14!  You win a $100 Shopping Cart!

     

    "There is nothing in the world except empty curved space. Matter, charge, electromagnetism, and other fields are only manifestations of the curvature of space." - John Wheeler,  American theoretical physicist, largely responsible for reviving interest in general relativity in the United States after World War II.

    "We can scarcely avoid the inference that light consists in the transverse undulations of the same medium which is the cause of electric and magnetic phenomena."  - James Clerk Maxwell, Scottish scientist in the field of mathematical physics, most notable achievement was to formulate the classical theory of electromagnetic radiation, bringing together for the first time electricity, magnetism, and light as different manifestations of the same phenomenon.

    "If you want to find the secrets of the universe, think in terms of energy, frequency and vibration." - Nikola Tesla,  Serbian-American inventor, electrical engineer, mechanical engineer, and futurist who is best known for his contributions to the design of the modern alternating current electricity supply system.

     

    The Electromagnetism competition challenged you to build projects that uses the force of electromagnetism, including anything from motors to solenoids to wireless transfer.  This was a really fun competition and from the get go, it offered many exciting possibilities.   One of my favorite projects was, the One String Electric Guitar #6 : Final Assembly and Working Guitar by dubbie , who has a knack for creating original projects, entertaining videos, and does a really great job of walking you through the process.  He's also done some really awesome robot projects which makes him a favorite of the Project14 program!  There were so many awesome projects with this competition,  not just the winners, so check out all the runners up as well.  For instance, there was the Easy Peasy Non-Contact Electricity Detector (Not a Metal Detector) by  mahmood.hassan.  Also, aptbartmess , a first time Project14 participant created a really cool video in support of the electromagnetism competition,  An Attempt at Building a DIY Spring Reverb Tank Using Electromagentism.  He even picked up a vote from one of our judges.  There were some technical issues with posting videos in blogs but we're grateful he shared this video with us, and we're looking forward to more projects from him in the future!  You could make the argument that any of the contestants could have been a first place winner.  The judges were largely divided when it came to picking the winners. Hopefully, you enjoyed this competition as much as we did.  The creativity of our members is second to none!

     

    The three first place winners were all deserving as we've come to expect from these competitions!  shabaz is no stranger to diy test equipment and he's created some really cool test instrumentation projects as part of this program (he loves Project14 because it gives him a good excuse to try his hand at shorter, experimental projects).   For this project, he set out to build a low-cost gaussmeter and the result was    Measuring Electromagnets - the Magneto Mutant Magnetic Measurement Meter (MMMMM-1000) .   He also comes up with really great titles for his projects!   abg123 , a first time Project14 participant, was captivated by magnetism for a long time so he decided to do something about it by Flipping Core Memory Bits Directly With a Magnetic Stylus.  Finally, dougw who came up with this theme, built a probe that can scavenge power with The KLINGMAGON Subspace Probe .    The projects for this competition were electrifying, as you would expect from electromagnetism, and demonstrated the power of the force like this guy:

     

     

    Without further adieu here are your winners.....

     

    {tabbedtable} Tab LabelTab Content
    The Winners

    The Winners

     

     

    Measuring Electromagnets - the Magneto Mutant Magnetic Measurement Meter (MMMMM-1000)  by shabaz

     

    When making electromagnets, it is difficult to know for sure what kind of magnetic flux density has been achieved. This is because it depends a lot on practical construction factors, where on the electromagnet it is measured, and the core material permittivity. There are commercial measurement devices, known as gaussmeters, but the good ones usually cost upward of $150. Furthermore, those $150 units are basic – they have a response up to 300Hz (for changing magnetic fields) and do not report the actual frequency either. For this project, shabaz  wanted to build a low-cost gaussmeter, and hopefully try to add those missing features, and also aim beyond 300Hz to a few kilohertz. For sure I expected it to be more inaccurate compared to a commercial device, but he thought it might be good enough, and it was worth an attempt (shabaz  loves Project14 for this reason - it gives us a good excuse to build shorter, experimental projects if we want to).

     

    Measuring Electromagnets - the Magneto Mutant Measurement Meter (MMMMM-1000)

    "Well built and described. This seems like a great instrument and a great platform to build onto." - Community Member Judge

    "Measuring Electromagnets, well described and easy to build." - Community Member Judge

     

     

    "Educational and well documented." - Community Member Judge

     

    "M5. This pipped in at the last minute but it was not disappointing in any way. The detail that Shabaz has worked into this unit is fantastic. I don't own anything capable of measuring field strengths and as an engineer I do like to be able to measure just about everything. Therefore I hope to be able to follow this project at a later date and make my own version of it. I have given my third choice to Shabaz." - Community Member Judge

     

    Flipping Core Memory Bits Directly With a Magnetic Stylus by abg123 :

     

    abg123  has been captivated by magnetism, as he suspects many are, for a long time. His discovery of core memory at the Computer History museum in Mountain View, CA triggered the idea to create a core memory module that is interactive. He discovered Jussi Kilpelainen’s Arduino Core Memory Shield on Tindie and that was the kick he needed. He added an LED array behind the cores to illuminate each core in real time and so he could selectively flip a bit one direction with a stylus (a small screwdriver with a magnet attached). he suspects the presence of the permanent magnet is inhibiting the “destructive read” and/or the follow-up write. The result is only being able to clear the bits at this time. The next step is to create an active stylus to allow me to choose whether I want to set or clear a bit. This will effectively enable drawing AND erasing, to make the project more interactive. Pursuing this next step is going to bring along more learning about magnets and core memory, which is the real goal behind this project. He’ll move on to the electromagnet experiments. One challenge he’ll likely face is the fact the cores are not all arranged in the same orientation. They are placed in an alternating pattern to make the wiring & drive circuitry layout more efficient. If his solution ends up relying on orientation of the stylus relative to the core, He'll have to get extra-clever.

     

    Flipping Core Memory Bits Directly With a Magnetic Stylus

    "Clever and different." - Community Member Judge

    "I initially thought Andy had made all the PCB and memory latticework but he was truthful in stating he bought it, which is always appreciated. It didn't really detract from my interest in how he made the pre-bought board into a nice little game with the application of an LED matrix unit. For giving me insight into this board, and the possibilities from it, I have chosen him as my second place." - Community Member Judge

     

     

    "Magnetic Stylus, very interesting legacy technology view." - Community Member Judge

     

    The KLINGMAGON Subspace Probe by dougw:

     

    No wires, no batteries, no solar panels, no screws, no glue and no suction cups, but a The KLINGMAGON Subspace Probe  can scavenge power to operate and cling to a vertical window without supports.  For a long time, dougw had been planning on building an outdoor digital thermometer that uses a temperature sensor and digital display without requiring periodic battery replacement. His original plan was to use solar power and super capacitors, but he hadn't gotten around to figuring out what would actually be required to make it work. Problems like keeping the solar panels clean were looking like they were as much work as replacing batteries. His work with Qi chargers suggested maybe he could use wireless power transfer to eliminate wires going through the walls. He had most of the needed parts already collected and had it all worked out in his head, so he figured he could whip a system together in a few hours..... wow was he was wrong...

     

    The KLINGMAGON Subspace Probe

    "Following the path of his building, I found a lot of applications. Interesting the final demo experiment on the glass; beyond the obvious - like cleaning difficult to reach glass surfaces (like the external part of windows - I see applications also in scientific applications and more." - Community Member Judge

    "Well thought out, documented and useful" - Community Member Judge

     

     

    "Another amazing build by  Doug.  This seems like a great platform for many future projects" - Community Member Judge

    Runners Up

    The Runners Up

     

    "Very close runner-ups to dubbie for One String Electric Guitar and three-phase for 3000A current clamp table and amplifier." - Community Member Judge

     

    One String Electric Guitar by dubbie:

     

    dubbie  thought he would start the building of the guitar body with the pickup itself. As he has a magnet which he thinks is suitable he decided to 3D print a bobbin that fitted it to hold the winding coil. The magnet is 8 mm in diameter and 15 mm in length so he looked at making a bobbin with these dimensions. All he has to do now is wind the bobbin to complete the pickup and the prototype guitar is finished.  As he completed the prototype body for the one string electric guitar, the next step was to make the pickup coil. He previously made a 3D printed bobbin to wind the coil on so all he needed now was to select the wire to be used and wind it. He selected the thinnest wire he had, which is 'pretty thin' (that's a technical term for non-mechanical engineers) possibly 32 SWG or 38 SWG. It is so thin you could barely see it, even with his glasses on. It is enameled so that the coils do not short out. He thought about making a coil winding mechanism with perhaps a continuous rotation servo motor but then decided winding it by hand. He doesn’t think he’ll do that again as it took a long time and the coils are not especially neat but eventually he had something made  Having created the prototype one string electric guitar body and pickup he wanted to be able to hear the sounds it makes.

     

    Because he didn't have a guitar amplifier he decided to use an ordinary music amplifier instead but this needs a pre-amp to make it work. There didn't seem to be any such thing as a guitar pre-amplifier, all he could find were expensive foot pedal pre-amplifiers which were not for me. Then he stumbled across electric guitar headphone amplifiers, which do exactly what he wanted, so he purchased a low cost one. This seems to do everything he needs and is rechargeable.  He followed a painting strategy of undercoat then top coat of spray paint. The undercoat was just a wood primer and undercoat combined, which he sanded down after the first coat and then undercoated it again and sanded it again to try and get as smooth a finish as reasonable. The undercoat did show up many imperfections which he thought he had eliminated by using the wood filler. He must have been looking the other way as there are several quite obvious dips and imperfections. Still, he was in the painting phase and he didn't want to delay any more.  As you can see and hear from the video it looks pretty much like an electric guitar and makes a gratifying electric guitar like sound. It has tone, volume and overdrive controls. Dubbie plays a tune of sorts in the video, anyone know what it is? Not a normal electric guitar song but he’s not a musician so this is about the best he can manage. The tune deteriorates after a bit as he doesn’t know where the next notes are.

     

    One String Electric Guitar

     

    "I started following it with sincere curiosity; the author reputation is not new and as a guitarist, I was very curious. Then, when I saw the result, I have just to compliment the great building, including the form-factor of this original string instrument. I am very happy that the project become so popular and followed and commented by a lot of other users." - Community Member Judge

     

    "I really connected with this simple project from the start and the regular blog posts keep my interest going. So there was no coding, homemade PCB or complex electronics but there was some 3D printing, bobbin winding and some awesome carpentry/painting skills ! For such a simple approach the result was surprisingly professional. Therefore I have placed this as my top choice." - Community Member Judge

     

     

    3000A current clamp table and amplifier by three-phase:

     

    For his entry in the electromagnetism contest, three-phase  decided to look at building some current clamp table adapters. The intention of these was to allow me to test the full-scale range of current clamps utilizing his single phase injection test set. He also intended to look at trying to test the frequency range of these current clamps using a current amplifier. The concept of this has come about due to some monitoring work that was carried out whilst energizing a 132kV supply at a substation and the need to carryout transient analysis of the voltages and currents during the energization. He concedes that this hasn’t gone to plan at all, so this is more of a blog on the journey rather than a finished project.

     

    3000A current clamp table and amplifier

     

    "Donald has once again shown that his attention to detail and testing can produce a great project."  - Community Member Judge

     

     

    "Great build, well described." - Community Member Judge

     

    An Attempt at Building a DIY Spring Reverb Tank Using Electromagentism by aptbartmess

     

    "First of all, it's a great creation; then it is a kind of effect in electronic music that I always loved but I never had the possibility to investigate in depth. I bookmarked the idea and with some modifications maybe I will include a similar version in my next book of projects for makers." - Community Member Judge

     

     

     

    Easy Peasy Non-Contact Electricity Detector (Not a Metal Detector) by  mahmood.hassan :

     

    Before building this device mahmood.hassan  tried lots of different designs but every circuit had some issues, either with a metal detector or human contact detention (humans are detected as an AC voltage source). He built a separate device for instrumentation amplifier, 2nd order band pass filter and ARM mcu, to do all the math (FFT), so he could only detect AC voltage and not metal detection or human contact detection. After lot of trouble he was able to achieve this by using the following very simple circuit.

     

     

    Before beginning his easy peasy electricity detector, he gives a good explanation on the basic functionality of non contact AC voltage detector Whenever there is current flowing through a conductor there is always a magnetic field around it. If the current flowing through the conductor is an AC current then the magnetic field varies periodically according to AC frequency. If we bring another conductor near it, a very small voltage will be induced in it due to electromagnetic induction, which the easy peasy non contact electricity detector will use to detect AC voltage.

     

    Easy Peasy Non-Contact Electricity Detector (Not a Metal Detector)



     

     

    What's Happening Now

     

    There's always stuff going on in the community and the best ideas always come from you.  Suggest your idea in the Monthly Poll!  and vote on the themes you want to do projects on. You can make use of wireless technology and a cloud provider with the IoT: In the Cloud competition.  Or, you can use radio waves to communicate through NFC or RFID in the NFC/RFID project competition!

     

    NFC/RFIDIoT: In the Cloud
    Project14 | Build Projects that Use Radio Waves to Communicate Through NFC or RFID! Project14 | IoT in the Cloud: Make Use of a Wireless Technology and a Cloud Provider!

    NFC/RFID IoT: In the Cloud

     

    Project14 is currently celebrating its second birthday with Month of Robots .  The Grand Prize is an Arduino Engineering Kit, a Marty the Robot STEM Kit, and a $200 shopping Cart.  3 First Place winners will win an R2D2 App Enabled Droid along with a $200 Shopping Cart.  The competition will run until May 14th with a winners announcement on May 25th, the anniversary of the original release of Star Wars in 1977.  This robotics competition is dedicated to Gordon McComb and the Robot Builder's Bonanza 5th Edition!

     

    The Birthday Special: Month of Robots
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    Thank you for continued support of Project14 !

     

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    Be sure to Congratulate the Winners and Keep Being Awesome!