7. Electronics design

Class site

Electronics Design

Class video

Fab-20190227B_Review05: 3D scanning and printing
Fab-20190227D_Lesson06: electronics design
video

Assignment

group project:
use the test equipment in your lab to observe the operation
of a microcontroller circuit board
individual project:
redraw the echo hello-world board,
add (at least) a button and LED (with current-limiting resistor)
check the design rules, make it, and test it
extra credit: simulate its operation

Learning outcomes

• Select and use software for circuit board design
• Demonstrate workflows used in circuit board design

Have you?

• Shown your process using words/images/screenshots
• Explained problems and how you fixed them, including how you worked with design rules for milling (DRC in EagleCad and KiCad)
• Included original design files (Eagle, KiCad, Inkscape, .cad - whatever)

turorial

7.1. Introduction to EAGLE
7.2. Why did we put a 20MHz crystal on the Hello FTDI?
7.3. Eagle Resources

For Japanese

MDX-15環境

• 捨て板(MDF 4mm)：交換済
• 面だし：済 -　MDX-15 捨て板面出し
• スピンドル遊び：修正済 > Fabmodules 1/64 cut depth: 0.2 mm

Assignment

• EDA(Electronic Design Automation,電子設計オートメーション)
  • KiCad
    • KiCad ことはじめ
  • Eagle
• libraries
  • https://gitlab.cba.mit.edu/pub/libraries > FabAcademyで使うもの(KiCad, Eagle)
  • Digi-Key KiCad Library > 表面実装の電子部品の購入先(KiCad)
• Eagle
  • Pre-session資料
    • Eagle2018 Ver. 9.2.2
    • Eagle new library
• やること

redraw the echo hello-world board,

add (at least) a button and LED (with current-limiting resistor)

• buttom
  • タクトスイッチ
• LED
  • LED RED CLEAR 1206 SMD-: Vf(forward voltage,順方向電圧)=1.8V
  • LED GREEN CLEAR 1206 SMD-: Vf=2.1V
  • LED YELLOW ORANGE CLEAR 1206 SMD: Vf=2V
  • LED BLUE CLEAR 1206 REV MT SMD: Vf=3.3V
  • LED WHITE YELLOW 260MCD 1206: Vf=3.2V
• Resistor
  • 1K ohm
  • プルアップ抵抗: プルアップ抵抗について解説

check the design rules,

• Eagle: DRCで確認 > 1/64”(0.4 mm)のパスが作れるか

make it,

• 切削: fabmodulesで基板のサイズ確認とPNGのdpi変更を忘れずに
• 半田付け

and test it

• http://academy.cba.mit.edu/classes/embedded_programming/hello.ftdi.44.program.png
• 書込み: hello.ftdi.44.echo.interrupt.c hello.ftdi.44.echo.interrupt.c.make
• FabISPを使う
• term.py を動かしてテスト > Embedded Programming > 検索
  -　Arduinoのシリアルモニタでもできる
• USB-TTLシリアル5V Cable
  • data sheet
  • ドライバー
  • FTDIピンに差し込む向きに注意 > GND(黒)が上
• FTDI USBシリアル変換アダプター
  • ドライバー

extra credit: simulate its operation

Group Assignment

• test equipment
  • テスター（Multimeter）
  • Oscilloscope: Tektronix TBS1052B
• 作った基板の動きやデバッグでオシロスコープを使ってみる
  

For Next Week

• Monday 9:00 EST, 23:00 JST
  • Recitaion: none
• Tuesday Time:
  • Asia Regional Review: 13:00-14:00 JST and 22:00-23:00 JST
  • 可能な限り参加してください
  • videoconference
    • conference for meetings: https://bluejeans.com/fabevent/1248
• Wednesday 9:00 EST, 23:00JST
  • videoconference
    • https://bluejeans.com/academany/2486 ~200 ports
  • Computer-Controlled Machining

assignment

group assignment
- test runout, alignment, speeds, feeds, and toolpaths for your machine

individual assignment
- make something big

• 3/9(土)
  • データ作成
    • 材料：15mm x 1,220mm x 1,215mm 1枚
    • 厚みは実測しないと正確には分からないので、パラメトリックでデザインする
  • VCarve Pro Trialで操作練習
  • TecShopの ShopBot SBUの資料を持参
• 3/10(日)
  • TechShop 10:00-21:00
  • 会員証忘れずに
  • 終了後は持ち帰るので袋などの用意