Magnets / Magnetism: June 2015

Monday, June 29, 2015

Super Magnetic Putty Devours Magnets!

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Super Magnetic Putty! This non-Newtonian super magnetic putty comes alive and attacks anything magnetic near by.

Like an animal on the discovery channel it devours magnets like prey!

Home made silly putty infused with natural black iron oxide Fe3O4 (30 Microns).

Three different iron oxides were tried and tested but this worked the best by far.

This video is not sped up or edited in any way. We have commercial magnet putty products that are quality and work well but nowhere near as magnetic as this putty.

If interested in a "How To Make" video just thumb up and leave a comment requesting video.

Check out other videos, like and subscribe:

Magnetism:  http://goo.gl/Pk8dV0

Electrical Electronics:  http://goo.gl/E3oIKn

LEDs:  http://goo.gl/3rbfRf

Science / Education:  http://goo.gl/iAe7EM

RC:  http://goo.gl/j3e5K0

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Monday, June 1, 2015

Incredible Magnetic Levitation - No Electricity

Magnetic Levitation

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Spinning top levitates in mid air.

This was considered impossible until not long ago.

Consists of a strong base magnet with a magnetic spinning top properly weighted to hover above as long as the top keeps spinning at the right rpm.

The product is called a Levitron.

Really cool for kids to play with and get interested in science.

Static Magnetic Levitation

https://www.youtube.com/watch?v=Wgr1HOjcGO0

Product info:

LEVITRON® - The Amazing Anti-Gravity Top

Introducing The New DELUXE PLATINUM EDITION

The new LEVITRON top - for the new Millennium. This deluxe version of the new SUPER LEVITRON features a high-tech, flying saucer look. The advanced design includes adjustable legs for ease in leveling the device. An instructional CD-ROM is included with each LEVITRON DELUXE PLATINUM EDITION TOP.

The LEVITRON has been called the best new science toy in a generation - by members of the American

Association of Physics Teachers, and it is the perfect gift for the person that has everything.

Spin the top - and watch it float! The Levitron spins and surfs on magnetic waves! Pass your hand above, underneath, and around the top. It will continue to spin and float only touching air! The LEVITRON floats free in space, supported only by the repelling magnetic force produced by permanent magnets (no batteries required!). A scientific theorem, that was advanced over a century ago, states that this is impossible - yet this amazing top levitates right before your eyes! You must see it to believe it!

How To: Magnetic Levitation

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(Homemade) diamagnetic levitator with an old hard drive magnet and carbon graphite elevator motor brushes used as diamagnetic plates.
Crudely and quickly made for nearly free.
You can also levitate a magnet with silver, bismuth, or pyrolytic graphite for best results.
The graphite, silver, and bismuth act as a diamagnetic and repel a magnet regardless of the polarity.
The large (dangerously powerful) hard drive magnets are used to counteract the force of gravity so a magnet can levitate freely between the diamagnet graphite.

Also see Magnetic Levitation
https://www.youtube.com/watch?v=y52kV...

Levitating Above Chess Table With Levitron

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Levitating Magnetic Spinning Disc.

Magnetic Top levitating above a large magnetic base that sits beneath the chess table.

More videos: http://www.youtube.com/playlist?list=...

Lenz's Law & Eddy Current Demonstration & Explanation Using Copper, Alum...

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Simple yet amazing Lenz's Law & Eddy Current Demonstration & Explanation using copper, aluminum & different magnets.

See Video for explanation & see pics at end on how to get hard drive magnets broke free.

Check out our other videos on magnets, science & all things cool.

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Lenz's law is named after Heinrich Lenz
Francois Arago was the first to observe Eddie Currents

Look up the following names to learn more:
James Clerk Maxwell
Richard P. Feynman
---------------------------

The aluminum in the video is a large heat sink taken from a damaged motor soft starter. It cooled large Powerblock SCRs - see SCR tester video: http://youtu.be/YOzw9btb--k

The large magnets are from server drives while the smaller ones were purchased.

The copper pipe with the slit was purchased over a decade ago from an online science store.

Probably from Arbor Scientific:

Lenzs Law Apparatus
Product # P8-8400
Experience the fundamental principle behind electric motors with this demonstration. Drop the strongly magnetized plug through the copper pipe, and induced currents cause it to fall very slowly. The unmagnetized plug falls without resistance. Viewing window lets you see the action, and yellow plug ends make them easier to see. Experiments and information included. Lenz's Law Apparatus allows you to demonstrate electric and magnetic forces. Electric current generated by a moving magnet will always oppose the original motion of the magnet that created the current. Amusement Park thrill rides use this same principle for braking.

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Never Purchased from them but Grand Illusions seems to have a lot of cool stuff.

If you drop the little metal slug down the copper tube, it falls under the pull of gravity, and drops out at the bottom, just as you would expect.But take the second, apparently identical, slug; drop it down the tube, and hey presto! the slug travels down the tube extremely slowly. You can even see it's slow passage via the window in the side of the tube.It is a great magic trick, but the truth is just as amazing. The second slug is highly magnetic. Now Michael Faraday, the British physicist, discovered as long ago as 1831 that when you pushed a bar magnet into the opening within a copper coil, an electric current was produced within the coil. This is known as electromagnetic induction.The Russian physicist Heinrich Lenz observed that the direction of the induced current in a conductor is always such as to oppose the motion which produced it.So as the magnetic slug moves down the copper tube, a series of transient "eddy currents" are induced in the copper tube, and these currents will create a magnetic field that opposes the downward motion of the slug.1

Lenz's Law & Eddy Current Demonstration & Explanation Using Copper, Alum...

Mag-Probe & Tesla Meter App Hard Drive Magnets

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Mag-Probe & "Multi Measures" Tesla Meter App detecting magnetic fields from hard drive magnets.

The BARTOL MAGPROBE Instantly Checks Electrically Operated Solenoid Valves and Relays. It can Sense a Magnetic field as low as 3 Gauss without the Ring Magnet, 1 Gauss with the Ring Magnet attached. You can Test Electrically Operated Solenoid Valves and Relays while the Equipment is Operational, Use it Underwater, in a Vacuum, 40 below zero, and also in explosive areas. It is non-contact and very easy to use. Typically tests can be done in seconds. It is 99% faster in a volt meter. Over eighty thousand have been sold.

http://bartolmagprobe.com/

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Multi Measures - The all-in-1 measuring toolkit
By SkyPaw Co. Ltd

Multi Measures is the most handy tool kit in the world. It turns your iPhone/iPod into a multi functional measuring device with: decibel, teslameter, metronome, stopwatch, timer, seismometer, ruler, surface level and many more

Decibel

This tool turns your iPhone, iPad or iPod touch into a professional sound meter, precisely measures the sound pressure level all around you. This extremely useful and beautiful tool will not only be a great tool for many uses but also bring you a lot of fun. Have you wondered how quiet is your room or how loud is a rock concert or sport event?

Teslameter

Teslameter takes advantage of the built in magnetometer in your iPhone/iPad, allows you to monitor the strength of magnetic field all around. There are a range of real-life applications for this useful item, such as: metal detector, AC magnetic fields, or finding low-magnetic places for sleeping

Metronome
Timer
Stopwatch
Seismometer
Plumb Bob
Surface Level
Spirit/Bubble Level
Ruler
Protractor

Diamagnetic Levitation Pyrolytic Graphite

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Diamagnetic Levitation with Pyrolytic Graphite demonstrated by Emily Gittemeier.
Check out our other magnet videos.
I first made two levitators but liked the look of this one so I purchased it about 10 years ago. Emily just unpacked it out of a box.

I think it was purchased from K&J Magnetics.
https://www.kjmagnetics.com/proddetai...

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Permanent Magnet Levitator v.2.0

The levitation setup is made of solid wood and stained to a nice finish that can be used as a desktop decoration or conversation piece.

HOW DIAGMAGNETIC LEVITATION WORKS:
Pyrolytic Graphite is one of the most diamagnetic materials known to man. Diamagnetic means that the material repels either pole of a magnet. The lifter magnet simply compensates for gravity to allow the floater magnet to balance between the two pyrolytic graphite plates. Levitation occurs when the lifter magnet is just close enough to provide enough force for the floater magnet to overcome it's weight. The floater magnet is then repelled equally by the two graphite plates and becomes suspended in mid-air.

See our recent article about the magnet levitator here.

The kit includes the levitation jig shown above complete with pyrolytic graphite as the diamagnetic material, nine neodymium magnets to experiment with, and a detailed instruction sheet. No tricks or batteries required - just FUN SCIENCE! This is an absolutely fascinating experiment for a great price.

Kit includes:
1- Levitation Jig
1 - D62 Neodymium Lifter Magnet
1 - D21 disc
1 - B221 block
1 - B222G-N52 block
1 - D31 disc
1 - B331 block
1 - B333 block
1 - D42B disc
1 - B442 block
1 - instruction sheet

Lenz's Law Demo with Aluminum Heat Sinks & Hard Drive Magnet

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Simple Lenz's Law & Eddy Current demonstration using aluminum & hard drive magnets. Made with free parts.
The aluminum heat sinks taken from a faulty motor soft starter and the magnets where taken from old hard drives.
https://www.youtube.com/user/KGittemeier

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Demo from Arbor Scientific:

Lenzs Law Apparatus
Product # P8-8400
Experience the fundamental principle behind electric motors with this demonstration. Drop the strongly magnetized plug through the copper pipe, and induced currents cause it to fall very slowly. The unmagnetized plug falls without resistance. Viewing window lets you see the action, and yellow plug ends make them easier to see. Experiments and information included. Lenz's Law Apparatus allows you to demonstrate electric and magnetic forces. Electric current generated by a moving magnet will always oppose the original motion of the magnet that created the current. Amusement Park thrill rides use this same principle for braking.

How To Remove Hard Drive Magnets from Base Plate

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How To Remove Hard Drive Magnets from Base Plate.

Both the old larger style & newer flat style magnets.

The older hard drives have much larger more powerful magnets. Usually four per drive.

The newer hard drives only have one flat magnet but still very powerful for its size.

https://www.youtube.com/user/KGittemeier
https://www.youtube.com/user/KGitteme...

How To Build a Retractable Magnetic Plumb Bob

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How To Build a Retractable Magnetic Plumb Bob

Tie a retractable chalk reel line to a plumb bob. Be sure to get braided line as it wont twist and spin. Glue a magnet to the back for quick easy attachment to ferrous metal objects and also to hold the plumb bob while in storage.

I purchased the Dewalt Compact Chalk Reel and a Johnson Steel Plumb Bob both from Home Depot. The Dewalt has a push quick release that is convenient and its fairly compact which I like.

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DEWALT
Compact Chalk Reel Kit with Blue Chalk

PRODUCT OVERVIEW Model # DWHT47257L Internet # 204624599 Store SKU # 1000024431
DEWALT has a well-earned reputation for designing and manufacturing many of the world’s most reliable and best-performing professional-grade power tools. And every product is forged with DEWALT’s unwavering commitment to producing tools and accessories that can withstand harsh jobsite conditions and meet the unyielding day-to-day demands of professional contractors. And now, DEWALT has applied that same no-nonsense, GUARANTEED TOUGH philosophy to its new line of heavy-duty hand tools. Designed to deliver the same standard of excellence as its power tools, DEWALT hand tools were conceived on the jobsite and built to exceed the expectations of professional homebuilders, remodeling contractors, plumbers, electricians, industrial maintenance mechanics, drywall hangers, demolition crews, and all other construction trades.
3:1 gear ratio
Compact size ideal for secondary reel or correction reel
Sealed gear system helps protect gears from debris and contamination
Clutch design for fast, easy unwind
Belt clip for simple, secure storage
--
DWHT47257L
Compact Chalk Reel with Blue Chalk
Product Features
Compact size ideal for secondary reel or correction reel
3:1 gear ratio
Clutch design for fast, easy unwind
Belt clip for simple, secure storage
30’ Braided line

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Johnson
8 oz. Steel Plumb Bob
PRODUCT OVERVIEW Model # 08 Internet # 100184170 Store SKU # 378437
The Johnson 8 oz. Steel Plumb Bob features a removable top, so it's easy to tie the tool to a string or line. The plumb bob is made of plated steel, and it resists corrosion.
Ties easily to a string or line
Hexagonal machined steel
Bright-plated finish for corrosion resistance
Removable top for easy, centered string installation

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Johnson
8 oz. Steel Hexagonal Plumb Bob

http://www.johnsonlevel.com/P/1431/08

MODEL #: 08
Hexagonal machined steel body

Corrosion resistant plated finish

Removable cap for easy, centered string installation

Magnets Interacting at a distance w Mag Probe Detector

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Two server drive magnets interacting at a distance while magnetic fields detected by the Bartol Mag-Probe magnetic field detector.

Both free magnets salvaged from old server hard drives - see videos https://www.youtube.com/user/KGitteme...

Hard drives no longer contain magnets this strong and powerful. These are circa 1992.

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Mag-Probe

The BARTOL MAGPROBE Instantly Checks Electrically Operated Solenoid Valves and Relays. It can Sense a Magnetic field as low as 3 Gauss without the Ring Magnet, 1 Gauss with the Ring Magnet attached. You can Test Electrically Operated Solenoid Valves and Relays while the Equipment is Operational, Use it Underwater, in a Vacuum, 40 below zero, and also in explosive areas. It is non-contact and very easy to use. Typically tests can be done in seconds. It is 99% faster in a volt meter. Over eighty thousand have been sold.

http://bartolmagprobe.com/

Bartol Mag-Probe HS Compliments of Steve Bartol

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A look at the new Bartol Mag-Probe HS and my old Mag-Probe S Model.
The new Magprobe HS was sent compliments of Steve Bartol.
This is an indespensible tool for technicians.

https://www.youtube.com/user/KGitteme...

—————————

▪ Fast troubleshooting during equipment operation (safety permitting)
▪
▪ Isolates problems as electrical or mechanical in seconds without a schematic
▪ Requires no direct electrical connection
▪ Variable sensitivity
▪ Detects troublesome transit pulses
▪ Every unit hand-crafted and quality control-tested
▪ Can be used in high-risk explosive environments
▪ Long-life power source and low current LED lasts for at least 5000/5 second operations
▪ Detects residual magnetism
▪ Shelf life of 5 years
▪
Mag-Probe® is a magnetic sensing instrument used to trouble-shoot AC and DC powered solenoids, solenoid valves, relays, mercury wetted relays, heat controllers and test coils used in robotics— even automotive alternators, voltage regulators and electronic ignitions systems. Unit is ideal for testing the largest to sub-miniature solenoids, relays and most reed relays and all automotive applications.

———————————————————————

The BARTOL MAGPROBE Instantly Checks Electrically Operated Solenoid Valves and Relays. It can Sense a Magnetic field as low as 3 Gauss without the Ring Magnet, 1 Gauss with the Ring Magnet attached. You can Test Electrically Operated Solenoid Valves and Relays while the Equipment is Operational, Use it Underwater, in a Vacuum, 40 below zero, and also in explosive areas. It is non-contact and very easy to use. Typically tests can be done in seconds. It is 99% faster in a volt meter. Over eighty thousand have been sold.

How to Determine Magnetic Polarity with Mag-Probe

***NOTE This video incorrectly states that the needle of the compass points to a magnetic north pole.

That is incorrect as the GEOGRAPHIC NORTH POLE is actually the MAGNETIC SOUTH POLE disregarding magnetic variance or declination.

This is a very common mistake and is actually incorrect in many texts and on many websites. Think of the compass needle as the "Geographic North Seeking Pole" of the compass magnet.

Vaguely remembering that before I shot this video I looked it up online only to find some of the incorrect websites. Only later when I built this polarity detector https://youtu.be/5NTch0j1gts did I find my mistake.

Click here to Subscribe: http://goo.gl/DDfVab
Determine magnetic polarity of a magnet or coil with this cool feature on the Bartol Mag-Probe.
Mag-Probe noncontact test probe.
Check out our other Videos:
https://www.youtube.com/user/KGitteme...

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From http://bartolmagprobe.com

When using the high/low sensitivity ring, the
“Mag-probe” becomes sensitive to north and
south poles. White dot toward the “Mag-
Probe’s” tip detects North. When the ring is
removed and installed with the white dot on
the ring towards the “Mag-Probe’s” LED,
you'll detect only south poles. ! !
DC powered devices can be connected to a
power source two ways.!
(See figure 6A and 6B) !
! In figure 6A, assume that a
north pole occurs
at the coils upper end when a DC voltage is
applied as shown. If the polarity of the
applied voltage is reversed as shown in
figure 6B, A South Pole is generated at the
upper end. Try both ends of an operating
solenoid, relay, reed relay, or DC device.
Once you establish which end of the relay or
DC device causes the “Mag-Probe” to
operate, the other relays or DC devices
installed in the instrument under test should
respond at the same end. (See figure 7)!

Waterproof Non Contact Probe

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Underwater testing of the Bartol Mag-Probe Waterproof Non-Contact Test Probe.
https://www.youtube.com/user/KGitteme...

--------
http://bartolmagprobe.com

▪ Fast troubleshooting during equipment operation (safety permitting)
▪
▪ Isolates problems as electrical or mechanical in seconds without a schematic
▪ Requires no direct electrical connection
▪ Variable sensitivity
▪ Detects troublesome transit pulses
▪ Every unit hand-crafted and quality control-tested
▪ Can be used in high-risk explosive environments
▪ Long-life power source and low current LED lasts for at least 5000/5 second operations
▪ Detects residual magnetism
▪ Shelf life of 5 years
▪
Mag-Probe® is a magnetic sensing instrument used to trouble-shoot AC and DC powered solenoids, solenoid valves, relays, mercury wetted relays, heat controllers and test coils used in robotics— even automotive alternators, voltage regulators and electronic ignitions systems. Unit is ideal for testing the largest to sub-miniature solenoids, relays and most reed relays and all automotive applications.

———————————————————————

The BARTOL MAGPROBE Instantly Checks Electrically Operated Solenoid Valves and Relays. It can Sense a Magnetic field as low as 3 Gauss without the Ring Magnet, 1 Gauss with the Ring Magnet attached. You can Test Electrically Operated Solenoid Valves and Relays while the Equipment is Operational, Use it Underwater, in a Vacuum, 40 below zero, and also in explosive areas. It is non-contact and very easy to use. Typically tests can be done in seconds. It is 99% faster in a volt meter. Over eighty thousand have been sold.

Waterproof Noncontact Magnetic Test Probe, Waterproof Testprobe, Waterproof relay tester, Waterproof Solenoid Valve Tester, Waterproof Solenoid Tester, Waterproof Valve Tester, Waterproof Coil Tester,
Waterproof Magnetic field probe design, Magnetic field sensors,
Magnetic field probe, Magnetic field probe non contact, Non contact magnetic field probe,

Magnetic Polarity Detector Trial Test

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Trial test of a Magnetic Polarity Detector using a hall effect sensor (APX9141) and indicator LEDs. This is just a test before I build a battery powered pen sized Magnet Pole Tester. I lost the AMY6 Magnet Tester I purchased so I decided to just build one. A circuit diagram is in the video.

Check out other videos, like and sub:
Magnetism:  http://goo.gl/Pk8dV0
LEDs:  http://goo.gl/3rbfRf
https://www.youtube.com/user/KGitteme...