Signal Desk

Add Signal Desk to this device

Good to know

  • An internet connection is required. Nothing works offline.
  • Adding it does not request permissions or send notifications.
  • The app window and browser tabs may use separate storage, so practice records can look different.
  • Menu names and positions vary by browser and version. To remove it, use your browser’s or device’s app settings.

Motion Zones

Your mirrored camera preview is split into four zones. Wave a hand in the lit zone, take it out, then go for the next.

  • 6 targets · up to 60 s
  • Webcam
  • Camera permission on Start
← Game lounge

Getting the controls ready…Still loading. Check your connection, then reload the page.

Ready

Time left
60 s
Targets hit
0/6

Pressing Start asks for camera permission. Video is shown on this page only and never saved or sent.

No AI and no face or hand recognition: only the share of pixels that changed from the baseline in a tiny 64×48 grey picture. Each frame is discarded after the next comparison.

How it works and limits

How to play

  • Press Start to allow the camera. When the preview appears, hold still briefly while the baseline is captured.
  • Wave a hand in the lit zone. When that zone changes the most for several frames in a row, it counts.
  • After a hit, move your hand out of the picture. When it calms down the next zone lights. There are 6 targets.
  • Lighting changes or camera movement trigger a new baseline. The camera switches off at once on Stop, finish or a hidden tab.

How movement is detected

Video is reduced to a 64×48 grey picture and the share of pixels that differ from the baseline is calculated per zone. No AI model, face or hand recognition, or network.

Both the preview and the maths are mirrored, so top left on screen is top left in the calculation. Frames are discarded after the next comparison.

Limits

Dim light, backlight, a moving camera or people moving behind you can make it harder. This game does not rate camera quality. If no picture appears at all, run the webcam test first.