On Thu, 26 Apr 2007 12:30:36 +0100, Chris ] wrote:

Would it be easy to make a half-hour timer that emitted a soft ping when
the half-hour was up?
I thought it might be useful to signal the end of a period of
meditation.

Dead easy!

Stick a coin or such in the side of a burning candle, candle standing on a tin
plate, so that it falls out after about half an hour...


Thomas Prufer