MIT FabAcademy Week4 Note - Electronics Production

Circuitboard

Circuits program circuits. Circuitboard you load a program to another board.

PCB(Printed Circuit Board) fabrication

No use etching(蚀刻), but machining, which is good for prototyping and is not good for volume production.

Use 1/64 for the surface of the board, and 1/32 for cutting through (make edges).

The sequence：

• fixturing 装夹，紧固（用双面胶）
• underlay (衬底)
• orientation
• zeroing (针头刚好接触板面)
• set-screws (固定螺丝)
• lifetime
• deburring (去毛刺)
• cleaning

Check this tutorial in detail, or a Video Walkthrough

PCB materials:

• FR1（made from natural fiber） for rigid
• Kapton / #1 epoxy film(环氧胶膜) / #1126 copper tape(铜箔胶带) for flex (use vinyl cutter)

Design rules: width/spacing (15, 5 mils)

Components: through-hole(穿孔), surface-mount(表面贴装), chip-scale(封装). ATTINY44

Assembly: solder焊锡, make joints shiny and smooth

CAM: use fab modules to make the PCB

All FabAcademy Notes (to be continue):

• FabAcademy Week1 Note - Introduction
• FabAcademy Week1 Assignment - Build a website and use Git
• FabAcademy Week2 Note - CAD
• FabAcademy Week2 Assignment - 3D Modeling
• FabAcademy Week3 Note - Computer-Controlled Cutting
• FabAcademy Week3 Assignment - Computer-Controlled Cutting
• FabAcademy Week4 Assignment - Electronics Production
• FabAcademy Week5 Note - 3D Scanning and Printing — Steemit

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