HP 15c CE - New firmware update officially available!

[Eric Rechlin]

(08-06-2024 08:21 PM)Johnh Wrote:  rI havnt updated yet, but I'd have thought 120ms would be fine, it amounts to more than 8 inputs per second. Even just between a couple of the same digits, I can't put them in faster than about 5 per second and wouldn't expect to be reliably able to do so.

It's not a desire to press the same key 8 times in a second (8 times averaging under 143ms apart), but rather to press the same key twice at that speed (2 times under 143ms apart).

(08-07-2024 01:15 AM)Dave Britten Wrote:  Something I just noticed: the 15C CE debouncing logic seems to be imposing a minimum amount of time between successive key presses. But if you press and hold a key briefly (a second or two), then very quickly release it and press it again, it will still register the second keystroke even if you release and press again much quicker than 120 ms. It seems to me that the debouncing logic should be changed to impose a minimum elapsed time between the previous key *release* and the next press, which would possibly allow decreasing this debouncing delay, and improve reliability of detecting quick - but intended - repeated keystrokes. It's the unintended break-make cycles that need to be filtered out.

That's a brilliant discovery. If true, it probably explains why there is so much variation between different users' experiences, and if fixed as you suggest, I suspect we'd have a much more reliable keyboard for more users.