Week06

Introduction to this week

  • * Use as more as possible tools to draw the echo hello-world board
  • Tools I tried includes: Eagle, Aultium designer, kokopelli. And I found that Eagle is the most suitable for me to use. It's very easy to get started.

    1. Schematics desgin

    Before doing the circuit laying out, we have to design the circuit first. Actually it's how the circuit works based on baisic electric principles. In this case I choose LEDs to 'say hello', we have to learn how LED works in electric principles.
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    In my case, you can find that I added two LEDs on board. Each LED connects to one individual Input/OutPin from MCU, and one current-limitation registance is added between LED and Pins.
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    Here is the recording vedio how I was laying out my board.
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    Source File for circuit board
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    And use SR-20 to make the circuit board. But as you can see from the picture, it seems a bit rough because of the milling depth. In my opinion, if I have less depth, things becoming better.
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    Then, soldering work. There is no so much to be talked abbout. I programmed on this board to have a function shows like: When push one Key, the left LED lights up. And when I push another, the other one lights up.
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