Random Thoughts

Project- Xbox Cooling System Prep-Fiber Optic Communication of Temperature

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   Below is another small piece of the puzzle for my Xbox Cooling System Project I was
working on while I was studying Electrical Engineering. For the Cooling System Project,
there would need to be communication of temperature, so I wanted to research how a
fiber optic cable would accomplish it.
         This lab consists of making a circuit that transmits temperature data over a fiber optic cable and then displays if the temperature is decreasing or increasing. A fiber optic cable contains one or more optical cables that carry light. These optical fiber elements are often individually coated with plastic layers and are contained in a protective tube to help protect the cable from where it is being installed. The benefits of a fiber optic cable over copper and other forms of cabling are extensive. They can transmit more information over greater distances and harder to “tap” into, providing greater security. Fiber optic cables also eliminate the need for grounding which makes them immune to any type of electrical interference and makes them an excellent choice for outdoor use and when having to be placed in close proximity to electrical cables.
          By using a temperature sensor (LM35) we are able to sense the temperature variations. This information is then sent through the non-inverting amplifier (741) and the modulator 555 VCO and finally ends up at the transmitter light emitter (E71). This information at this point goes through the fiber optic cable into the receiver light detector-(D72). The information then is sent to the demodulator (LM565) and then to the voltage follower and attenuator (741). Finally, after the information is sent to the ADC (ADC0809) it arrives at the LED display and shows us if the temperature has increased or decreased.
          This circuit could have a wide range of uses and applications. It could sense the temperature outdoors and tell an air conditioning system whether to turn on or off. It could also be used to detect the heat on a heatsink or stick of ram in a computer and either turn on or control the speed of fans to help prevent overheating. This would be very important when overclocking. Using the fiber optic cable would help these sort of applications greatly because it reduces the risk of heat or electrical interference.
          
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