Your one-stop-shop for all electrical and magnetic needs


Tape Recorder - $9.99

Covered in small magnetic particles, a microphone transforms sound to be recorded into an electric current, which is used to magnetize the particles in a certain way, a current flowing through the coil in the head creates a magnetic field aligning the poles of the magnetic particles as the tape moves by. Valdemar Poulsen was the first to invent the electromagnetic tape recorder.

Metal Detector - $99.99

They create their own magnetic field so when a metal object passes through it sense change in magnetic field triggering an alarm. in 1881, Alexander Graham Bell invented the first metal detector. Bell's metal detector was an electromagnetic device he called "The Induction Balance".

Credit Card - $39 /mo

The stripe on the back of a credit card is a magnetic stripe, often called a magstripe. The magstripe is made up of tiny iron-based magnetic particles in a plastic-like film. Each particle is really a tiny bar magnet about 20-millionths of an inch long. The magstripe can be "written" because the tiny bar magnets can be magnetized in either a north or south pole direction. The magstripe on the back of the card is read by swiping past a magnetic reading head (tape head). A tape head is a type of transducer used to convert magnetic fluctuations to electric signals. Ralph Schneider invented the first card.

Magnetic Resonance Imaging (MRI) - $10,000

Patients lay in a strong magnetic field created by very strong magnets; 40 times stronger than earth’s field magnetic field! This aligns hydrogen atoms as if they were little compass needles and the machine then applies radio waves to interfere with this alignment. The MRI's computers analyze the signals given off by the atoms as they change their alignment, providing an electronic image of whatever is inside the machine. Raymond Vahan Damadian invented the first MRI machine.

Scrap metal crane - $19,000

A scrap heat metal crane is simply activated by flipping a switch which sends a current down a copper coil into what is the “electromagnet”. The metal charges up and behaves like a very powerful magnet which can be used to pick up heavy metal objects. The magnet can be turned off by stopping the current, which will demagnetize the “electromagnet”. The electromagnet was invented by William Sturgeon.

Speakers - $79.99

A speaker is made out of an electromagnet surrounded by a cup called a diaphragm. The electromagnet is submerged in a magnetic field caused by the ‘permanent magnet’ laying under the electromagnet. The positive and negative ends of the magnets interact as any other magnets would. But when the current in the electromagnet changes the polarity of it, the direction of attraction/repulsion also changes, which causes the electromagnet to “bounce” up and down causing a vibration in the diaphragm, producing sound waves. Alexander Graham Bell patented the first electronic speaker in 1876.

Television - $1,399

A picture captured by a camera is broken into a series of dots or pixels across the width of the picture. As each dot is captured the amount of red, green, and blue light is electronically recorded in three numbers. The television receives the stream of data through electromagnetic waves in the air. The TV decodes the signal with magnets that read the pattern and send the data to the pixels of the TV. Philo Farnsworth invented the first all-electric TV.

Fridge Magnet - $1.99

It works by it applying pressure to the fridge through a process of electromagnetic currents to hold it secure This can only be achieved by it containing a mixture of iron and copper to fully harness immensity and density needed to obtain a balanced force. The field which surrounds the magnet is then held in place by a bond with the electrons, you notice like a normal magnet that it is attached to the other magnetic substance, this is not the same in a fridge magnet because the structure is different. William Zimmerman invented the first refrigerator magnet.

Compass - $4.99

A compass functions as a pointer towards magnetic north, due to the magnetized needle aligning itself with the earth’s magnetic field. The field exerts a torque on the needle pulling on pole of the needle north and the other south. William Sturgeon invented the first modern compass.

Microphones - $12.99

As sound waves enter the mic, it causes a component inside called a diaphragm to vibrate. These vibrations change the capacity in the capacitor, and these changes are amplified to create a measurable signal. The signal is made of electronic waves that travel down the audio output cord to a speaker. Emile Berliner invented the microphone, while trying to improve Alexander Bell’s phone.

Coyotecase - $49.99

Original! New! From Electromagnetism! An iphone case that charges itself using the earth's magnetic field! It has a compass on the back that spins like a motor when it interferes with the earth's magnetic field. This produces an electrical current that is used to charge your phone! James Blake is our engineer and CEO, and the inventor of Coyotecase.

Electromagnetism: How it works

Electromagnetic induction

Electromagnetic induction is the production of a potential difference (voltage) across a conductor when it is exposed to a varying magnetic field. In both motors and generators, there is a wire coil in a magnetic field. In a motor, a current passes through the coil causing the coil to spin. In a generator, the coil is mechanically spun, inducing a current in the coil, producing an electric force. According to James Maxwell, a change in an electric field generates a magnetic field. An electromagnet is a type of magnet in which the magnetic field is produced by the flow of an electric current.
physics animations - The Magnetic Field

Michael Faraday

Michael Faraday was an English scientist who contributed to the fields of electromagnetism and electrochemistry. His main discoveries include those of electromagnetic induction, diamagnetism, and electrolysis. It was by his research on the magnetic field around a conductor carrying a direct current that Faraday established the basis for the concept of the electromagnetic field in physics. Faraday also discovered that magnetism could effect rays of light and there was an underlying relationship between the two phenomena. It was largely due to his efforts that electric force became practical for use in technology. Faraday found that a changing electric field in a circuit induces a magnetic force in the circuit.