Page Comparison

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•  High current loops have sufficient copper
•  No acute angles between traces and traces, and traces and pads.
•  Data lines have uninterrupted return paths
•  Differential signals are tightly coupled and impedance controlled
•  Teardrops are present

Board - Copper

•  Ground planes Planes are stitched together
•  No ground islands or near-islands

Board - Mounting

•  All mounting holes are kept away from the edge of the board Mounting holes adhere to standards Electrical Standards#Mounting
•  There is adequate support for all the heavy components and connector plugs
•  Make sure that edge mounting holes are about 2.7mm radius an are at least 3mm away from each edge. Lock these components after placement.
•  Make sure there is a keepout/polygon cutout around mounting holes -> cannot be on the keepout layer → has to be copied on the bottom and top layers

Board - Connectors

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• Unless higher current is required, under special circumstances
•  Make sure there are enough GND test points!
•  Headers and pins for all communication protocols - for now, 0.1" headers, to standardize on a debug connector
  1. I2C
  2. SPI
  3. etc

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•  Vias are tented
•  Unused via pads are removed, including except on outer layers
•  Planes are stitched Sufficient number of vias present for large currents
•  Thermal vias present where appropriate
•  Through holes have no paste opening

Board - Layers

Silkscreen

•  No overlapping text
•  "JLCJLCJLCJLC" order number location is specified Connectors are labeled
  1. With function on top side (power input, CAN, Thermistor, etc.)
  2. With pinout on bottom side (or top side if possible)
•  Logo is on the board
•  Correct Name is listed
•  Pin 1 labeled on all ICs
•  Ensure bottom silkscreen is mirrored
•  Optional parts (such as CAN termination) is labeled
•  Ensure all polarized components are labelled
•  Double-check all of silkscreen in 3D mode

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•  Ensure that all parts are in the BOM, and have Supplier part numbers - ideally manufacturer part numbers as well
•  Ensure the no components are ordered on tape and reelThis just increases cost for no reason (since we don't have a pick and place machine)
  
  1. Digikey part numbers that end in DKR usually have tape and reel - watch out for them!
•  The BOM must be generated and all parts put on digikey to make sure everything is in stock

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•  How to export Altium PCB to gerber files (jlcpcb.com) ← follow this to generate gerbers
  1. NC Drill file is a txt file, make sure to include it in the zip

After Generating Gerbers

•   Go to JLCPCB and upload the gerbers: https://jlcpcb.com/quote#/?orderType=1&stencilWidth=100&stencilLength=100&stencilCounts=5&stencilLayer=2&stencilPly=1.6&steelmeshSellingPriceRecordNum=A8256537-5522-491C-965C-646F5842AEC9&purchaseNumber=
•  Make sure that JLC detects all layers and that the gerber viewer looks correct
•  Upload the gerbers to the board sendouts page when available.
•  Make sure the output files are in the GitHub branch and are well organized so that we can easily find the most recent rev

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STEP File

•  Make sure the STEP file is also generated, and in the correct location. Make sure whoever on Mech knows where the STEP file is so that enclosures, mounts can be designed for it.
  1. If having trouble opening the STEP file in Solidworks to verify that it is correct, see this thread: https://forum.solidworks.com/thread/223404