brief.md

Doing a proper motherboard for the modules

Brief

A single "breakout board" several elements:

• A Feather WICED: https://www.adafruit.com/product/3056

• Two home made modules (with KiCad):

  • https://github.com/kelu124/echomods/tree/master/tobo/source/Kicad
  • https://github.com/kelu124/echomods/tree/master/goblin/source/Kicad

• A power supply: http://amzn.to/2kH5VbB

• A OLED screen: http://amzn.to/2lTwYW2

• A trinket pro

• Two headers for raspberry pi should also be present

• The communication between the two modules is purely using the stripboard. There are 19 tracks ( https://kelu124.gitbooks.io/echomods/content/Chapter6/interfaces.html ).

• The trinket provides two pins to the ITF-I_pulse_on and ITF-J_pulse_off tracks -- and needs only 5V in and GND.

• The board will need basically a couple of pullups for the OLED screen, and decoupling capas for the power supply module.

• There will be also to have some headers available for a servo (see: https://raw.githubusercontent.com/kelu124/echomods/master/croaker/images/kit-overaview.png ).

• It would be great to have a double header available for the different tracks at the level of the stripboard.

• And overall, some marking on the board level to easily identify the tracks

Overall board is

Full board is

Empty board is

Connection between modules

Trinket :

• BAT to 5V track (track #2) and GND on GND track (track #1)
• Pin 12 to Pulse A (#9) and Pin 13 to Pulse B (#10) Feather :
• Pin A1 to Signal out track (#3)
• Pin B5 to Track Pulse A (#9)
• GND to GND (track #1) and VUSB to 5V (track #2) Power supply :
• 3.3V connected to 3.3V track (track #19)
• 5V on the 5V track (track #2)
• GND on GND track (track #1) OLED :
• VCC to 3.3V track (track #19) and GND on GND track (track #1)
• SCL to Feather WICED SCL pin
• SDA to Feather WICED SCL pin Small TFT

Double header not connected to anything (tracks cut). Double header for breakout of TFT screen.

Outcome ?

Should look like this: