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OG OG is offline
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Default How to make a "soft ping" timer?


"Mike Barnes" wrote in message
...
In uk.d-i-y, Clive Mitchell wrote:
The person who posted the "5 silent tracks and a chime" idea should
consider that this is exactly the sort of thing that would sell to
hippies on ebay.


To do the job properly, you'd want to carefully arrange the track
lengths to give a wide range of time periods. For example, ten tracks
each of four minutes, two minutes, one minute, and thirty seconds. A
total of 40 tracks, time range 0:30 to 75:00. No doubt this scheme could
be improved on.

Then you'd need to provide a table to look up the starting track number
based on the time required. And hope your customers weren't too spaced
out to understand it.

--
Mike Barnes


It's always a compromise.
the 5 silences and a 'silence+ding' was so that you didn't need to do too
many 'skip's before you were ready.

I once built a dark room circuit based on a IC555 chip that switched on the
enlarger bulb for combinations of 1 : 2 : 4 : 8 second intervals based on
DIP switches to give me any combination up to 2 minutes 7 seconds - of
course it was too much bother to use, so you go for 'one elephant' 'two
elephant' instead! There's rarely a need to be able to discriminate between
1'32" and 1'33"