A few questions about vias and pads on a pcb
I am confusing with designing two layers pcb and have several questions of it. One question is about the utility of 2 layers pcb, is it to avoid using jump wires? I also want to know if you can still solder a component on the bottom layer even if the route is on the top layer? Are the layers linked somehow like vias thanks to the pads?
My suggestion is to try it with single layer pcb instead of going the easy way of the 2-layer board. If you don't succeed in doing this on a single layer, you'll never be able to do a more complex board on a 2-layer pcb either.
The reason of using 2-layer pcbs is to avoid the jump wires. On a complex board there would be lots of them in all directions. Your layout doesn't need the second layer, which is simple enough to be routed on a single layer without wire bridges. If you get stuck you may have to move some components to another position, but it can be done.
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