hexapod/electronic

Electronics

Bill of Materials (BOM)

Name	Thumbnail	Required
Raspberry Pi Zero W or Raspberry Pi Zero W 2		1
body_bottom		1
body_side_wall		2
body_back_wall		1
battery_box		1
battery_holder		2

Connection Diagram

PCB

Name	Thumbnail	Required	Note
main		1
sub		2	there is a difference (SJ1) between the 2 PCB, refer to below

Components

Name	Thumbnail	Required	Note
Linkit 7697		1
mini360 DC-DC Buck voltage regulator		7	adjust to 5V
PCA9685 (TSSOP28)		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
4 pin 2.54mm 90 degress male header		2
6 pin 2.54mm 90 degress male header		2
4 pin 2.54mm male header		2
3 pin 2.54mm male header (black)		6
3 pin 2.54mm male header (yellow)		6
3 pin 2.54mm male header (red)		6
2 pin 2.54mm male header		1
Jumper 2.54mm		1

PCB detail

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

Note.
`MP2307` refer to mini360 DC-DC converter

Layout

PCB

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

Note.
`MP2307` refer to mini360 DC-DC converter

Layout

PCB

Servo Connection

Each leg of hexapod has 3 servos (body, thigh, foot), refer to below diagram for correct connection