Thirty-six minutes is six sixes or four nines, a workshop length with equal rotations. Stations should be ready before the timer starts. Rotation time comes out of the block if you set up late.
A chime is kinder than a buzzer when groups are mid-sentence. Pick the sound on purpose. Press space to start or pause, R to reset, and F for fullscreen. The screen can stay awake after you start, using the wake lock your browser allows. Pick the alarm before you begin. A bell, a chime, a beep, or a short digital pulse all come from the Web Audio API, so there is no sound file to wait on.
This page is the 36 minutes countdown and nothing else is running underneath it. Related lengths are linked under the guide if you want a neighbor, and the timer itself stays above the fold.
Questions
How do I run a 36 minutes timer on a projector?
Press start, then F or the fullscreen button. Classroom mode hides the writing so the digits fill the wall. A chime is kinder than a buzzer when groups are mid-sentence. Pick the sound on purpose.
What is 36 minutes actually good for?
Thirty-six minutes is six sixes or four nines, a workshop length with equal rotations.
Will the countdown drift if I switch tabs?
No. The end is a timestamp. The display is the gap between that timestamp and now, so a background tab does not lose seconds the way a ticking counter would.