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Re: [Phys-L] Countdown Timer / Alarm / Stopwatch / Split Timer

Works great on my Windows 7, Internet Explorer 11 desktop. Really like that

Dr. Donald Polvani
Adjunct Faculty, Physics (Retired)
Anne Arundel Community College
Arnold, MD 21012

-----Original Message-----
From: Phys-l [] On Behalf Of John Denker
Sent: Sunday, August 31, 2014 5:40 PM
Subject: [Phys-L] Countdown Timer / Alarm / Stopwatch / Split Timer

Hi Folks --

There is virtually no physics in it, but here's something you might find of
some small value: It's a software timer.
-- It will count down and alarm when it reaches zero.
-- It will count up.
-- It displays HUGE easy-to-read digits on the screen.
-- You can use it as a stop watch, with arbitrarily many split times.
-- The splits have millisecond resolution, and probably ~20ms accuracy.

Free, libre, open-source, public domain, cross-platform javascript.
Obviously no warranty. Tested on Firefox (Linux) and Chrome (Android).
Probably works on other platforms. Try it online, then download it for
offline use.

Uses include:
*) Timing random events around the lab. The easy-to-use
split-timer function comes in handy.

*) Timing students' practice talks.

*) Timing talks at actual scientific meetings. There are
always a few guys who think the rules don't apply to them.
Having an actual audible alarm go off encourages them
to finish on time. Easy-to-read digits makes it easy
for them to know the score.

*) Ditto for political candidate forums. A /lot/ of these
guys think the rules don't apply to them. If they ignore
the nice bell sound, you can escalate to the "gong" sound
and/or the "cuckoo clock" sound.


BTW I still do not encourage introductory-level students to write in
javascript. It's too low-level. Learn to program in a modern high-level
language first.
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