Keyboard Debounce Algorithm & Key Chatter Tester
Diagnose worn mechanical switches causing accidental double-taps (switch chatter). Benchmark latency differences between Eager PR, Defer Debounce, and 0ms Hall Effect magnetic switches.
โ๏ธ Firmware Debounce Settings
Eager PR immediately registers keydown on first contact (0ms lag), then waits for contact leaf bounce to stabilize before accepting release.
Click Here & Press Any Key Rapidly
Spam Spacebar, W, A, S, D, or any key to detect millisecond chatter.
๐ What Is Key Chatter and Why Do Switch Contacts Bounce?
Metallic Leaf Contact Physics
When a mechanical switch stem presses two copper leaves together, they physically bounce against each other for 1 to 5 milliseconds before establishing stable electric contact. Without firmware debounce filters, a single keystroke would trigger 2-4 rapid duplicate letters ("hheeello").
Why Hall Effect Switches Have 0ms Debounce
Hall Effect (HE) magnetic switches use a permanent magnet in the stem and an analog sensor on the PCB. Because there is no physical metal-to-metal collision, magnetic flux changes continuously with zero mechanical bounce. This allows true 0.1ms rapid trigger and instantaneous reset.