Reflection of class on Dec 6th

  As we all know, our course in this semester is named as ‘computer architecture’. We have assembled the basic Raspberry computer at the first time we got the initial box with parts of components inside and did programming on Python 3 to create various images and fabulous interactive games, what’s more, we can also surf the Internet or listening music as other normal computers.

  And this chapter 6 of ‘Hello Raspberry Pi’ really showed us how to promote our little computer physically by adding some useful widgets such as ribbon cable, breakout board, solderless breadboard, jumper wires in different length, light-emitting diodes (LEDs) with different colors and resistors which have 180 ohm color bands.

  Actually, what we did in class was expanding the GPIO of little computer to make diodes blinking in particular ways. We connected the GPIO with breakout board by ribbon cable to make sure electrical signals could be transmitted successfully between computer and breakout board. There were numerous holes on solderless breadboard used for holding diodes and resistors, and I had to pay attention to the position of positive and negative pole so that there would be an entire circuit as long as I inserted the diodes and resistors.

  I don’t want to talk more about the physical circuit because I did so bad in learning physical circuit in high school, fortunately, I did well in programming the procedure on Python 3 to control the blinking of diodes.

  As usual, I typed the codes from example to the interface of text editor and pressed F5 to run it and saw how it worked. The diodes blinked as expected, that is, I could control different colors of diodes to blink in different orders and adjust the initial program to let them blink randomly by implementing random import. Everything was perfect except an error message which always appeared after running said there was something wrong in GPIO BCM set. But I don’t need to worry about it because this error wouldn’t influence the function of procedure.