update 0628 jornal

README.md

@@ -29,22 +29,41 @@
 
 ###  06/28/2019
 
-- Compare EAGLE and KiCAD
-  - EAGLE cannot import `.pcb` file
+- Confirm that copper tape has better conductivity than aluminum sheet when attaching microcontroller pins through `H-shape` cut
+  - Copper tape is harder to be scratched, which provides less risk of disconnection during assessmbly.
+
+- Research on PCB editor
+  - EAGLE
+    - EAGLE cannot import `.pcb` file
+    - `svg` can be exported but not imported
+    - Custom library needed if doing schematic design
+  - KiCad
+    - Can import `.pcb` file
+    - `svg` can be exported but not imported
+  - LayoutEditor
+    - support multiply file type
+    - `svg` can be exported with different color makers as multiple layers
+    - include open-sourced auto-router `freerouting`
 - Auto-routing package:
   - TopoR
   - Python-PCB
   - FreeRouting
-    - LayoutEditor
+
 
 - Approaches:
   - A. convert SVG/DXF file to schematic/board design of PCB.  Use KiCAD or EAGLE to do autorouting.
   - B. develop algorithm on auto routing for single layer svg/dxf file. (path finding problem)
- ##### Approach A
+ 
+ 
+##### Approach A
 -  Use regular shape board for PCB in KiCAD
    - image processing: divide alternative shape of `paperbot` to multiple rectangles (openCv)
    
-   - Pull required connections and place additional connection pin around edges of each rectangle
+   - Pull required connections and place additional header pins around edges of each rectangle
 
 - Make each connection pin to be two parallel connections so auto-router does parallel trace for each wiring.
-  - Etching a pair of parallel trace provides isolation, and leave the space between traces to be conductible.
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+  - Etching a pair of parallel trace provides isolation, and leave the space between traces to be conductible.
+
+- Build Library for schematic design
+  - Schematic design helps with router to know desired connection
+  - Additional header pins at each side of kink mark
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