Is there a way to specify seconds when starting the orgmode countdown timer? I've tried using fractions of a minute, such as 1.5, but it disregards anything after the first digit.
With Org version 8.3* you can specify time as
you enter, say,
:30 for 30 seconds.
* Specifically commit 93cc5fb (org-timer.el: hh:mm:ss format for setting a timer, 2015-06-02)