- Crystal oscillator
- George Washington Carver
- Yagi Uda Antenna
- PenicillinÂ
Crystal Oscillator
The crystal oscillator was invented in the 1920’s. It uses a crystal to create electric current. It is used in quartz clocks, radios, and computers’ micro processing chips.
George Washington Carver
The civil war ended with slavery being abolished. Carver was born into a family of slaves in the 1860’s. He was freed after the war. He graduated collage and began to teach farming and agriculture. He invented many ways to use peanuts. Peanuts, sweet potatoes, and soybeans could fix the soil after yours of growing cotton. He also pioneered crop rotation. He even spoke before congress. Moral of the story: Even though he was born low, Carver was able to rise to fame and invent great things.
Yagi Uda Antenna
The first antennas did not work very well. Two Japanese men, Yagi and Uda, invented the Antenna, which was named after them. (Yagi Uda antennas are usually referred to as Yagis or just plain antennas.) The Yagi uses a reflector and directors to direct current.
If you would prefer to watch the above video on Rumble.com or Odysee.com, click on the name of the site.
The Yagi could send radio signals pretty directly. They would go farther. In WWII, Yagis were used on aircraft. They were also used for TV, and it sped up the rate at which TV was adopted. They are still around today.
PenicillinÂ
During WWI, infection caused more death than shots of the enemies. Alexander Fleming invented Penicillin in 1929 after noticing that some fungus grew where he was growing bad bacteria. Penicillin is that fungus. Many doctors improved penicillin in the future. Production was sped up for WWII. It was available for the public after the war. This slowed down infection.