Homebrew PCBs

I didn't expect it to work, but I've just managed a PCB for a TSOP
packaged device with 0.5 mm pad spacing, printing the artwork on my
LaserJet IIIp. The pads haven't quite etched properly, so I'll need to
scrape away the shorts between them, but the PCB looks quite usable.

I'd assumed that I'd need a 600 dpi printer for this sort of thing.

Leon