Door bell timer using 555 IC?

[Yorkie]

Thanks for reading Mark, and for your helpful comments.

Ah, 'TUPTUNDUGDUS' - I remember it well! I've still got my old Elektor 'Summer Circuits' magazines from the '70s. Bat detectors, poltergeist scarers, Dalek voices...

Re the transistor circuit, I built that on Veroboard, and simple though it was, I probably made an error somewhere on one or another of the tracks.

I've kept the board and when I get a mo, I'll revisit it to see if I spot anything. I'd already embarked on a 555 PCB, so carried on with that.

I'm not a huge fan of stripboard - I  prefer to design a PCB, though I don't use any PCB design software, I usually furtle around with 'Paint'.

I've never really got to grips with programs such as Express PCB, though I know it's very popular and widely used. Some of the tracks and pads seem rather thin to my eyes. If space allows I try to use pads that are about 4mm diam, and tracks 3mm wide. The more copper left on the board, the better I find it.  All very low tech, but I don't do it often enough to invest the time in learning how to use PCB design software, (less still auto-routing!). Really, my tag-line sums me up

Well if you aren't wearing a badge at the NVCF, I'll just have to use your Facebook pic as an 'identikit' and accost anyone who seems to have a passing resemblance.

If you see a couple of old fogies who look like this, that's me & 'Mrs Yorkie':