Originally Posted by
sp1r0
not bad for a n00b, not bad at all. I double and triple checked your layout, everything is correct, except you have no power going to your lm339. Here's what it should look like...
Just to be clear here, your PCB layout is on top of the pcb, that is, you should mount and solder the parts right on the etched (top) part of the board according to your pcb layout. If you wanted to mount the parts on top of the board and solder underneath, like most hobbyists do, you will have to mirror the image.