What is SpaceFN and why you should give it a try
The SpaceFN concept - setting up your space key as a layer switch when held - is probably one of the most useful tweaks in the keyboard hobby. Let me explain how it works. My SpaceFN article on kbd.news made some rounds recently - quite surprisingly given the age of this concept. This piece you're reading is a condensed version of the full post. If you're left with unanswered questions, you'll most likely find the info you're looking for in the original write-up. On my imaginary top list of the most useful keyboard features, tweaks and hacks, SpaceFN would deserve a podium finish for sure. But what makes it so special? In short: SpaceFN is easy to implement, easy to learn, costs nothing, can be used with any keyboard, and can improve your productivity instantly. I will list its benefits below, but can state right at this point that the SpaceFN concept, setting up your space key as a layer switch when held, is clearly one of the most useful tweaks in the keyboard hobby....
Apr 30, 2024
[Note to Linux users] I noticed if I unplugged the keyboard then plugged it back into my Arch Linux machine it started acting strange, for example pressing "l" resulted in "jkl". After a bit of tinkering it seems the easiest solution is to press "Fn + F12" (I believe this toggles Apple/Windows mode). Doing "rmmod hid_generic; modprobe hid_generic" is the other alternative, besides rebooting.. It doesn't exhibit this behavior in my Windows 8.1 machine.
Now to find a pack of LEDs and ponder O-rings as well as keycap sets that either include "00" or can make some kind of nice combo with the originals in-place..
On another note, could you help us figure out the addition of LEDs? I put my multimeter across a few of the the LED holes on the PCB and it saw no voltage. What I assumed was the LED-on/off toggle (Fn + F7) didn't change that.