I'd like someone to look at my schematic and PCB design for comments

Don M

Before I fire it off to the PCB house I'd like any constructive comments on the design and layout. This design is replacing an existing board and the components and connectors are in strategic locations and can't be moved much. I drew it in Diptrace but am presenting it here in graphic format for all to be able to see.

Thanks in advance.

Don

Leon

You don't seem to have decoupling capacitors for the Propeller supply leads on the schematic.

Those acute angles where tracks are joined are a bad idea, they act as acid traps when etching and look ugly. They should join at right angles.

The routing could be tidied up a lot.

You seem to have some nets that haven't been routed. Have you generated a net completion report?

Don M

The decoupling caps are on the power supply schematic. There are 4 placed around the prop. All nets have been routed. All grounds have been connected by vias to the ground plane on the bottom side.

I'll look at changing the angled intersections into right angles. As simple as this board may look it was rather difficult to access so many prop pins at least for me anyway.

Thanks for the suggestions.

RDL2004

No, you want to avoid right-angles. Here is a pretty good guide by David Jones. It's definitely worth reading:

PCB Design Tutorial

Leon

T junctions on tracks should be at right angles.

RDL2004

Your right, I didn't word that very well. But you do want to avoid angles 90 degrees and smaller. If a right angle is necessary, such as on a t-junction, they can be chamfered.

Don M

Does that pertain to just signal traces?