Jaguar 0.4-alpha PCB Status (was Jaguar A4 PCB Status)

[DeuceEFI]

I have added D43 and D44 back to the schematic and to the PCB layout.
I have changed the minimum trace size to 0.0124" (except for the 0.0070" traces to the Mini USB connector) and have recreated the PDF files and updated the PNG images with the current design as of git hash 95621df09bceac62261fc0aad607f41efdf723df

Happy reviewing

[Fred]

"Added additional wire connection points for 1 ground connection per Injector MOSFET and increased the size of the trace to these pads"

I was going to ask, but good work! Checking now...

[Fred]

Comments in IRC, subtle stuff only, so not repeating here so as to not sway the comments of others.

[Fred]

What's left to figure out before you can go forward with a new build?

1) MAX992X chip square wave latency issue
2) Concurrency pin flicking for DIS/us control
3) Opto coupler/non-opto isolator for comms perf issues

Anything else?

Fred.

[Dan]

I don't think you need a separate wire/pad for each injector FET GND. I would've simply increased the size of the trace you had in the A3 revision or put a separate polygon pour that was isolated from the main GND polygon and then it would've been sweet.

What you have done will work and be adequate though, however, I do suggest going with the isolated GND polygon idea

[Fred]

If you looked at the layout, there wasn't enough room to put a trace with the same capacity as the outgoing traces on the other side in a shared fashion. It needed to be split and increased, or split completely, which seems cleaner, especially because it's designed to go to a carrier board anyway.

Or do you mean interrupt the ground plain on the other side of the board with an isolated area? If so, I guess that wouldn't be too bad of an idea.

I wonder what Andy has to say about it :-)

Fred.

[Dan]

interrupt the gnd plain is what i was on about.

[Fred]

He went through a couple of iterations last night and the end result was this, which I'm quite happy with:

[Dan]

each to his own.

Looks alright

4 wires are better than 8!

[Fred]

You heard of the skin effect? More parallel thin wires is actually better than less thicker wires of the same current capacity. However that's not at all relevant, because it's designed to be used with a connector board. Also, ravage has the same grouped grounding scheme, god help us all if you start wanting to change that! :-o :-) Please say no.