update README

README.md

@@ -1,3 +1,5 @@
+![banner](files/hexapod_og.jpg)
+
 # hexapod-v2-7697
 
 > 中文版本請看 [這裡](README_tw.md)

README_tw.md

@@ -1,3 +1,5 @@
+![banner](files/hexapod_og.jpg)
+
 # hexapod-v2-7697
 
 Hexapod v2 using Linkit 7697

electronics/README.md

@@ -4,27 +4,27 @@
 
 ![connections](files/connections.jpg)
 
-## Bill of Materials
+## Bill of Materials (BOM)
 
 ### PCB
 
-Name | Thumbnail | Required |
--------- | --------- | -------- |
-main |           | 1 |
-sub |           | 2 |
+Name | Thumbnail | Required | Note |
+-------- | --------- | -------- | ---- | 
+main | ![main](files/main_pcb_s.jpg) | 1 |
+sub | ![sub](files/sub_pcb_s.jpg) | 2 | there is a difference (SJ1) between<br>the 2 PCB, refer to below
 
 ### Components
 
-Name | Thumbnail | Required |
--------- | --------- | -------- |
+Name | Thumbnail | Required | Note |
+-------- | --------- | -------- | ---- | 
 [Linkit 7697](https://labs.mediatek.com/zh-tw/platform/linkit-7697) | <img width=200 src='https://labs.mediatek.com/images/img_hdk_7697.png'/> | 1 |
-[mini360 DC-DC](https://www.aliexpress.com/w/wholesale-mini360-dc-dc.html) Buck voltage regulator | ![](files/mini360.png) | 7 |
-[PCA9685](https://cdn-shop.adafruit.com/datasheets/PCA9685.pdf) (TSSOP28)| ![](files/pca9685.png) | 2 |
-Resistor: 220 ohm (0805) | | 18 |
-Resistor: 10K ohm (0805) | | 12 |
-Resistor: 470 ohm (0805) | | 1 |
-LED: green or any color (0805) | | 1 |
-Capacitor: 10 uF (0805) | | 2 |
+[mini360 DC-DC](https://www.aliexpress.com/w/wholesale-mini360-dc-dc.html) Buck voltage regulator | ![](files/mini360.png) | 7 | adjust to 5V
+[PCA9685](https://cdn-shop.adafruit.com/datasheets/PCA9685.pdf) (TSSOP28)| ![](files/pca9685.png) | 2 | TSSOP28 |
+Resistor: 220 ohm (0805) | | 18 | SMD |
+Resistor: 10K ohm (0805) | | 12 | SMD |
+Resistor: 470 ohm (0805) | | 1 | SMD |
+LED: green or any color (0805) | | 1 | SMD |
+Capacitor: 10 uF (0805) | | 2 | SMD |
 14 pin 2.54mm female header | | 4 |
 4 pin 2.54mm female header | | 2 |
 6 pin 2.54mm female header | | 2 |
@@ -39,21 +39,73 @@ Jumper 2.54mm | | 1 |
 
 ## PCB detail
 
-> Please use 'Eagle' software to open below schematics
+
+##### Software 
+
+Please use **Eagle 7.7** software to open schematic files (main.sch/main.brd and sub.sch/sub.brd)
+
+Eagle 7.7 can be found at http://eagle.autodesk.com/eagle/software-versions/1
+
+    Note.
+    7.7 is an old and free version of Eagle. 
+    Latest Eagle is not free anymore unless you are students
+
+##### Manufacture
+
+There are a lot of online service that can manufacture PCB/PCBA for you (just google `PCB/PCBA`).
+
+Seeed (https://www.seeedstudio.io/fusion_pcb.html) is one of them.
+
+They also provide instructions of generating necessary Gerber files at http://support.seeedstudio.com/knowledgebase/articles/1176532-how-to-generate-gerber-file.
+
 
 ### Main
 
+`main.brd`/`main.sch`
+
+##### Schematic
+
 ![main_sch](files/main_sch.png)
+
+    Note.
+    `MP2307` refer to mini360 DC-DC converter
+
+##### Layout
+
 ![main_brd](files/main_brd.png)
 
+##### PCB
+
+![main_pcb](files/main_pcb_l.jpg)
+
+
 ### Sub (x2)
 
+`sub.brd`/`usb.sch`
+
 > There is 1 difference between left and right PCB. The SJ1 of right PCB is left open, but `SJ1` of left PCB should be **closed**. (This is i2c address setting of PCB9865)
 
+##### Schematic
+
 ![sub_sch](files/sub_sch.png)
+
+    Note.
+    `MP2307` refer to mini360 DC-DC converter
+
+##### Layout
+
 ![sub_brd](files/sub_brd.png)
 
+##### PCB
+
+![sub_pcb](files/sub_pcb_l.jpg)
 
 ## Servo Connection
 
+Each leg of hexapod has 3 servos (body, thigh, foot), refer to below diagram for correct connection
+
+![leg](files/leg.png)
+
 ![servo_conn](files/servo_conn.jpg)
+
+

mechanism/LEG.md

@@ -1,5 +1,8 @@
 # Leg Assemble Instruction
 
+Leg assembly instruction video https://youtu.be/oaAE5fC09KQ is also available.
+<a href='https://youtu.be/oaAE5fC09KQ'><img width=480 src='http://img.youtube.com/vi/oaAE5fC09KQ/0.jpg'/></a>
+
 ## Preparation
 
 For one leg, you will need 3 MG92B servo and below printed parts

mechanism/README.md

@@ -12,6 +12,9 @@
 
 Please check [Leg Assemble](LEG.md) for more detail instructions
 
+Leg assembly instruction video https://youtu.be/oaAE5fC09KQ is also available.
+<a href='https://youtu.be/oaAE5fC09KQ'><img width=480 src='http://img.youtube.com/vi/oaAE5fC09KQ/0.jpg'/></a>
+
 > Note. Total 6 Legs are required.
 
 ## Body Assemble