will a 1.8mm trace be able to handle 5 Amps
Quotewill a 1.8mm trace be able to handle 5 AmpsThe theoretical min trace width for 5A is 1.38mm, so you should be ok but it also depends on the length of the run. That said it just seems a bit light on to me, but then I over-engineer everything. If you have room I would up the width.
Looking at the schematic, I assumed that opto had a logic output because of the way it was drawn, but I just looked at the datasheet and it actually has an open-collector output. I don't think it will effect you in this case but that's bad practice to show something that doesn't exist.What values are the resistors on the outputs of the optos, I assume 350R because you have 351 next to them but in other places you use a different format, ie 10k. If they are really 350R where do you plan to get a 350R resistor? AFAIK the nearest you can get is 352R and that's an E192 value (ie very precise). Surely a 330R will do the same here.
I have to say that the schematic is still very badly drawn, and thisIs just mind-numbing. I'm collecting material for a "worst schematic practices I've seen" article and may include this. The PCB on the other hand seems quite well laid out at first glance. A couple of things though.Clean this sort of thing up, it's a real mess and the sort of thing the auto-router would do, no human could run traces like that. If you are using the AR then clean up after it. BTW all ARs are crap, I don't know anybody that uses them.Also right-angle corners are generally frowned upon because acute internal angles on a trace can form acid traps that eat out the trace a little more than the average. With a course board like this it won't matter but it's good to get into the habit of using 45-degree corner. But in some cases using 45-degree corners would reduce the trace length considerably, never a bad thing for high-current runs.Some traces look very closeBut that may just be an aliasing issue with the lo-res graphic. Have you set you design rules according to the fab house you will use and does the board pass DRC?______Rob