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geekhack Community => Keyboards => Topic started by: TioSolid on Thu, 12 January 2017, 10:11:38

Title: Fixing Chatter in a Noppoo Mini with a TMK firmware
Post by: TioSolid on Thu, 12 January 2017, 10:11:38

Hi guys, I have a Noppoo choc mini with red mx switches and I love it, but from the past months this keyboard is having heavy chatter. Typing passwords become pure hell. The chatter only happens in some keys, but it just disappears after a while and comes back again for no apparent reason.

Since TMK firmware has a debouce setting and this noppoo has a serious problem with its NKRO over USB, I tried to kill two birds with one stone and made an adapter using a teensy, effectively creating an PS/2 > USB (via TMK) adapter to remove all the problems the original noppoo controller has (desoldering the original controller and soldering the TMK directly is a no go since I dont have the schematics for the keyboard pcb).

Thing is, since I used the TMK as an adapter, the PS2 adapter firmware does not have a debonce setting (as far as I know) and the problem is persists. So, does anyone could help me trying to fix my keyboard? Is there anything else I could do or any setting I could use in the TMK firmware to fix this? I did not try cleaning the keyboard yet, so any suggestions for this is welcome too!

Title: Re: Fixing Chatter in a Noppoo Mini with a TMK firmware
Post by: stakiman on Thu, 12 January 2017, 13:46:00

Hey! I've had two Choc Noppoo Mini's (MX Red) and both had this exact issue :(( Never found a fix, and have since desoldered and repurposed almost everything there... :/

Good luck!

Title: Re: Fixing Chatter in a Noppoo Mini with a TMK firmware
Post by: henz on Thu, 12 January 2017, 13:48:39

i have heard this about noppo keyboards before. Not sure what to do about it though. Think the guy stopped using it.

Title: Re: Fixing Chatter in a Noppoo Mini with a TMK firmware
Post by: TioSolid on Thu, 12 January 2017, 16:12:34

Quote from: henz on Thu, 12 January 2017, 13:48:39

i have heard this about noppo keyboards before. Not sure what to do about it though. Think the guy stopped using it.

yea, I had done that, and even bought a keycool 84 to replace it, but for some reason I keep coming back to my choc mini, sentimental value I guess haha

Title: Re: Fixing Chatter in a Noppoo Mini with a TMK firmware
Post by: davkol on Fri, 13 January 2017, 05:47:53

I don't see how that would solve the problem. Either hardware, or Noppoo's firmware is at fault.

I've considered rewiring my Choc Mini to a Teensy (as a controller) and reflowing joints on the PCB while at it (because the factory soldering is quite bad)... although I'd probably rather ditch the PCB altogether.

Title: Re: Fixing Chatter in a Noppoo Mini with a TMK firmware
Post by: TioSolid on Wed, 18 January 2017, 11:28:48

I wanted to do that too but without the wiring scheme to solder the teensy I guess that would be quite a challenge