Tom Vales came into our class and showed us a few electrical inventions, majority of which are used in our everyday lives. He introduced the Tesla Coil. The Tesla Coil is a resonant transformer circuit that is used to produce high-voltage, low current, high frequency alternating current electricity. This device was created to transmit electrical power without wires. An antenna would be constructed to pull the transmitted electrical energy into the electrical system. It can be considered a simple radio transmitter that operates within a broad range of high frequencies which transmits power and not information. This is similar to how we receive wall electricity.He showed a hot air engine which consisted of a cup of hot water and the steam made the contraption on the top move because the the temperature difference. This is considered to run on solar energy. He also presented a sterling engine that was a motor that was spinning. This was the substitute for steam engines in replacement to create power for machines. John Petleys copper and bismuth was also shown. This is when the invention is heated on one end and cooled on the other and then creates energy. He briefly spoke about the mendesedo motor which floats solar powered magnetics. There are four solar cells that make a current through the wire to propel the machine making power. In conclusion Professor Vales showed us a few different tools doctors used for quack medicine when referring to alignment. Having him visit class was a nice change from our normal labs. We were able to sit back and learn about these inventions without the stress of following a specific rubric.