I make home-made cheap PCBs (I use toner transfer, then acid etching method now, but I might use UV etching someday). I wonder what is the best (and cheap) way to control if there is no problem on connectivity of the traces?
I control the connections by a multimeter, but it takes too much time to check all the connections with it especially if I make 10 or more PCB at a time. Sometimes I see that there are very tiny gaps that disconnects the paths and too hard to see them by bare eye. Is there any spray or can I use camera (webcam) to detect the broken paths, or any smart method?