> But growing up, I realized that we already have magic in our world, which we call electricity.
Today its kind of boring to most people (not me obviously) but imagine how magical it was upon discovery and propagation. A common need in industry is to turn a shaft which we now do with electric motors. Prior to the motor the only installable, on-demand source of rotational power was a steam engine. It had lots of moving parts, required a boiler, and fuel source that was either coal or wood and had to be carted in by horse. Then you had to hire skilled and trained operators to maintain the engines and the boilers.
With electric all you do is connect two or three wires to a hunk of iron and copper and a shaft supported by two bearings spins. Just make sure the bearings are oiled, brushes (DC motors were once common) are in proper order, and you're good to go. There is no dangerous combustion or flue gas, pipes, or burn hazards, no fuel storage or hazards, no bulky boiler and no need for boilermen. In an instant an invisible force is pushing the shaft around who's only wear items are serviceable bearings. If you needed light to see the machines these motors operated just connect two wires to a glass sphere which emitted a bright illuminating glow. That's magic.
Now thanks to modern high power transistors and smaller faster transistors in microchips we can tame this magical force much more accurately and cheaply enabling electric cars, led lighting, solar and renewables, high efficiency switching power supplies, and so much more.
All this thanks to the magical invisible force of electricity and electromagnetism tamed by our equally magical semiconducting devices. The modern world is literally moved by these devices.
I consider wireless to be black magic which is also enabled by really fast transistors.
Today its kind of boring to most people (not me obviously) but imagine how magical it was upon discovery and propagation. A common need in industry is to turn a shaft which we now do with electric motors. Prior to the motor the only installable, on-demand source of rotational power was a steam engine. It had lots of moving parts, required a boiler, and fuel source that was either coal or wood and had to be carted in by horse. Then you had to hire skilled and trained operators to maintain the engines and the boilers.
With electric all you do is connect two or three wires to a hunk of iron and copper and a shaft supported by two bearings spins. Just make sure the bearings are oiled, brushes (DC motors were once common) are in proper order, and you're good to go. There is no dangerous combustion or flue gas, pipes, or burn hazards, no fuel storage or hazards, no bulky boiler and no need for boilermen. In an instant an invisible force is pushing the shaft around who's only wear items are serviceable bearings. If you needed light to see the machines these motors operated just connect two wires to a glass sphere which emitted a bright illuminating glow. That's magic.
Now thanks to modern high power transistors and smaller faster transistors in microchips we can tame this magical force much more accurately and cheaply enabling electric cars, led lighting, solar and renewables, high efficiency switching power supplies, and so much more.
All this thanks to the magical invisible force of electricity and electromagnetism tamed by our equally magical semiconducting devices. The modern world is literally moved by these devices.
I consider wireless to be black magic which is also enabled by really fast transistors.