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manufacturing.md

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Babel-Babel manufacturing

PCB specification for all PCB

Main PCB

  • Layers: 4 (layer stack in manufacturing package)
  • Thickness: 1.0mm
  • PCB color: Red
  • Silkscreen: White
  • Surface Finish: LeadFree HASL-RoHS
  • Outer Copper Weight: 1 oz or 1.4 Mils
  • Inner Copper Weight: 0.5 oz or 0.7 mils
  • Material Type: FR4
  • Flying Prob Test: Fully Test
  • Castellated Holes: No

Enclosure PCB

  • Surface Finish: LeadFree HASL-RoHS
  • Color: Red
  • Silkscreen: White
  • Material: FR4
  • No Copper
  • Thickness: 0.8mm

Manufacturing

NOTE: When generating the gerber files, use the 2/2 DCP schematic.

  1. SMT mounting of the main PCB.

  2. Flashing both Babels and Dronecode probe on the PCB. This operation should be performed without installing any connectors on the PCB, a 4-pin pogo pin connector should be used instead. Connectors' pinouts used for flashing can be found in the picture below.

To flash Babel-Babel, the Babel part of the board has to be flashed first then the DCP part will be flashed. To flash and test Babel, follow the procedure below:

  • Turn off one babel by toggling the switch
  • Connect 1 DCP and 1 Babel from PC

  • Connect 1 CAN port from Babel to 1 port of Babel-Babel on the side that'll be flashed
  • Navigate to drwatson_babel repository and run "./drwatson_babel.py (babel port path)"

  • Hold the pogo-pins from DCP to flashing interface of Babel-Babel

  • Enter provided credentials and press enter and the flashing process will start

To flash the DCP part, follow the DCP Manufacturing documentation.

  1. After flashing is done, the PCBs and 3D enclosure parts should be stacked, aligned, and secured together using x5 M2x10 mm screws and nuts.
  • For the top 3D spacer, insert the bottom connector in the gap underneath CON4.

BOM for final assembly of Babel-Babel

Name Quantity
Enclosure PCB 1
Top 3D spacer 1
Main PCB 1
Bottom 3D spacer 1
M2x10 mm screws 5
M2 nuts 5