Member Since: January 13, 2011

Country: United States

  • Once Albert Einstein finally harnessed the power to time travel, he became a wizard, traveling through time to seek out all thing in the danger zone.

  • By his first attempt at flight, his aspirations of flying had all but petered out.

  • “They told me I should spend more time on the electronics, but nooooo, I had to have a sweet paint job.”

  • Mild-mannered engineer by day; mild-mannered engineer with cape by night. Such is the life of Captain Makey.

  • I hope you guys are ready to party! We brought joints and chips! (This comment is legal in Boulder, CO)

  • It made me question whether he actually said “Billy Chrystal displays.”

  • True sadness is not having a long enough arm to selfie your entire hat.

  • John Connor travels from the future to destroy SparkFun’s new robot kit parts, in fear that SkyNet will be built from Arduinos and Actobotics.

  • Introducing SparkFun’s new improv troupe: Haberdashing!

  • I taught high school physics, so teaching why resistors and capacitors do what they do and why they do it always came down to analogies. The students always enjoyed relating a parallel plate capacitor to a junior high dance floor. All the girls (positive charges since girls are cheery) and boys (negative charges, obviously), line up on opposite sides of the dance floor. However, they never actually cross the dance floor, since they are in junior high and are afraid of each other. If you make the dance floor wider, then more boys and girls can line up, which gives you more capacity for the kids - this is an increase in capacitance. On the other hand, if you make the dance floor really wide, the boys and girls are less interested in each other and don’t want to line up anymore - this is a decrease in capacitance.

    This explains the general equation that C=(epsilon)A/d. The width of the dance floor is the area of the capacitor. As the area increases, the capacitance increases. The distance between the boys and girls is like the distance between the plates of a capacitor. As the distance increases, the capacitance decreases.

    If you want to get really crazy, you can explain that the permittivity of the material or dielectric (epsilon) is similar to whether that are obstacles that block the view of the girls and boys on the dance floor. The less their vision is permitted, the lower the epsilon value, and the lower the capacitance. The higher the permittivity, the higher the capacitance.

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