Your one-stop-shop for all electrical and magnetic needs
Tape Recorder - $9.99
Metal Detector - $99.99
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
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.
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.