Door bell timer using 555 IC?

[AlanBeckett]

Clearly, in this age, the problem needs a Processor - for example see:-


  kingstoaster.pdf (Size: 71.01 KB / Downloads: 33)

However, it's always as well to consider the ramifications - http://en.wikipedia.org/wiki/Parkinson%2...triviality

I'd go for a big Cap and a couple of FETs.

Alan