Still looking at the schematic but looking at the pic I would reflow those solder connections. Might not be making good contact between the Drain and bus.
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Still looking at the schematic but looking at the pic I would reflow those solder connections. Might not be making good contact between the Drain and bus.
Dave
Always wear safety glasses while programming.
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Yea thats pretty ugly. What you see in the pix is actually excess solder from solder rod I melt onto the bus with hot air. I am using a hot plate and solder paste now to flow the solder. It works pretty nice and looks alot better.
Originally Posted by mackrackit
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One thing I should add..I sent a board to a nitrous manufacturer. They put the board on their flowbench and the board activated four stages at the same time for 15 seconds several times.
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I suspect the layout of components and traces. Can you post a pix of your board? A ground loop is possibly taking you down.
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I am attaching a color and B/W PCB view from my software. The wiring on race cars aren't ideal. Battery ground is connected to the chassis. Then there are three or four other points on the chassis components are grounded.
I have one other team with the same problem and they are using a transbrake aswell. They are also activating first stage right after transbrake release.
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I would prefer seeing just the copper layers without the overlaying idents. However, first impressions, GND signal traces are way too thin to be useful unless you have copper filled your board for the GND net. The way it is now, you will get huge surges on the GND line whenever a MOSFET switches. The GND trace, if not copper filled plane, should be at least as thick as the traces on Stages 5,6,7,8
Last edited by Jerson; - 28th September 2009 at 04:41.
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I do have a ground plane. I took it out so you could see the traces easier. I am attaching a PDF with the ground plane.
Thanks
Toby
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