If you really want to build something (why not? this is a HomeBrew newsgroup!) there are several choices he
http://www.ee.washington.edu/circuit...Schem_Tel.html

Gavin

"Keith" wrote in message ...
Does anyone have a schematic for once of those strobe circuits that will
flash when the phone rings. I want to make one for my workshop where it's
very noisy at times and I don't hear the phone.

Thanks

Keith