Instrument 05 · mouse
Mouse test
Click the real buttons and watch the diagram answer. The double-click readout is the switch-bounce detector.
LMR B4B5
buttons seen: none
wheel: 0 ticks (–)
double-click gap: – ms
Click every button, scroll both ways, then double-click at your natural speed.
Test the rest of your setup
How to read your results
Click each button on the diagram with its real counterpart, scroll in both directions, and double-click at your everyday speed. A healthy main switch produces double-click gaps in the 150 to 400 ms range. A reported gap under about 80 ms when you only meant to click once is the signature of switch bounce: the infamous fault where a worn switch fires twice.
Common fixes
- Unwanted double clicks: classic worn switch. Some vendors patch it with firmware debounce settings; otherwise it is a cheap switch solder-swap or a warranty case.
- Wheel scrolls the wrong way occasionally: dirt in the encoder. A burst of compressed air through the wheel slot fixes most of it.
- Side buttons dead: confirm they exist in the vendor software and are not bound to nothing; B4/B5 only report if the mouse actually has them.
- Cursor stutters: not a button fault: check the surface, the sensor window for lint, and on wireless, the dongle's distance and interference.