555 IC Project - 'Red Alert' Siren query.

[Aerodyne]

Entirely endorse your view on PCBs, Mark. I make my own and have done for many years. Easy at work, where the facilities were handy but in my retirement years I use the sun, clear inkjet film and the utility room sink! No problem at all. Why people have bother with inkjet prints when making PCB track patterns puzzles me. I have a standard - basic, really - Canon MP560 scanner/printer and make two high quality copies on clear film, transposing one on top of the other to gain sufficient density.
Agree too about the dangers relevant to kids and pets...
Tony