Q1: You want to use a blue LED in your next project. The datasheet is at http://www.jameco.com/Jameco/Products/ProdDS/2006764.pdf . You want drive this LED directly from a RedBear Duo pin. The Duo operates at 3.3V and pins can source or sink a maximum of 25mA. Can you do this? If so, what resistor should you use? If not, why not and what else might you do to get blue LEDs into your project?
Q2: Explain the difference between a (hobby) servo and a stepper motor. When would you use one vs. another?
Can't change a rubric once you've started using it.