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
Jaguar 0.4-alpha PCB Status (was Jaguar A4 PCB Status)
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Re: Jaguar A4 PCB Status
Andy.
FreeEMS vehicle #11, 1932 Ford 5 Window Coupe with a 1996 GM 3.1L SFI V6 with DIS ignition
FreeEMS vehicle #16, 1996 Chevrolet S10 2.2L SFI I4 with DIS ignition
Owner of http://www.coolefi.com
FreeEMS vehicle #11, 1932 Ford 5 Window Coupe with a 1996 GM 3.1L SFI V6 with DIS ignition
FreeEMS vehicle #16, 1996 Chevrolet S10 2.2L SFI I4 with DIS ignition
Owner of http://www.coolefi.com
Re: Jaguar A4 PCB Status
"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...
I was going to ask, but good work! Checking now...
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Re: Jaguar A4 PCB Status
Comments in IRC, subtle stuff only, so not repeating here so as to not sway the comments of others.
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Re: Jaguar A4 PCB Status
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.
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.
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Re: Jaguar A4 PCB Status
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
What you have done will work and be adequate though, however, I do suggest going with the isolated GND polygon idea
Re: Jaguar A4 PCB Status
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.
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.
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Re: Jaguar A4 PCB Status
interrupt the gnd plain is what i was on about.
Re: Jaguar A4 PCB Status
He went through a couple of iterations last night and the end result was this, which I'm quite happy with:
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Re: Jaguar A4 PCB Status
each to his own.
Looks alright
4 wires are better than 8!
Looks alright
4 wires are better than 8!
Re: Jaguar A4 PCB Status
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.
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