Test 1: Does the vibrator work?

Click the button below. The device should buzz once for about a second.

Test 2: Two buzzes

Click the button below. The device should buzz twice in quick succession.

Test 3: Two buzzes, again

Click the button below. The device should buzz two times. No more, no less!

Test 4a: Just one buzz

Click the button below. The vibrator should pulse only once.

Test 4b: One buzz, again

Click the button below. Again, just one pulse.

Test 4b: One buzz, one more time

Click the button below. One buzz, please!

Test 5: Timing the vibrator

Click the button below. The vibrator should turn on immediately, and text will appear below saying "vibrator on". The vibrator should turn off when the text disappears.

Test 6: Make a new tab

Click the button below. The vibrator should start vibrating. Now click the button again. A new tab should appear, and the vibrator should immediately turn off. Switch back to this tab and wait for 20 seconds; the vibrator should start again within that time. Click the button one last time to finish the test; the button should stop vibrating.

Test 7: Two iframes, two pulses

Click the button below. The vibrator should pulse twice. (It's ok if there's a slight hiccup in the first pulse.)