My custom keyboard project

[Yeitso]

So I've decided to go into deep waters and try to create my own keyboard without having any experience in coding at all

My plan is so far:

Tenkeyless keyboard with programmable leds on each key.

So what i want to do is run the Teensy 3.1 for this, dunno if that is smart or has been done at all (not alot about it on the web)

The plan is to do all this with the combination of a 8ch Mux and PWM. I know that the maximum output of the teensy is 3.3V 100mA on all ports, this ofc limits the possiblilty for my leds, but here comes the PWM in place.

Whan i want to do is to run a Led matrix (11x8) and with PWM only run 8 LEDs at the same time, So it would run the LEDs at 1/11 of their power. after one and other. So Row1, Row2, Row3 etc...
This is done by running the 8 colums on the mux and the 11 rows on the Teensy 3.1 PWM ports.

On top of this im going to have ofc a Tenkeyless keyboard on 6x17 matrix. (and thus making me use a total of  37 pins and pads on the Teensy, 39 with the addition of GND and 3.3V to the Mux).
Yes im aware that this is pushing the limits of the Teensy but hey why not?

Ive attached a copy of my scematic of the beast. (there is a 16ch mux on that but i realized that i don't need a 16ch one in the middle of building and cba to change it )
 schematic.png (512.25 kB. 13050x6483 - viewed 156 times.)

My question is this:

Is this PWM config even possible with current libraries?
Where can i find a keyboard config for the Teensy 3.1? Ive found the ones that is used to set the teensy to continously send some keyboard commands, but i want to use it as a normal keyboard.

[joey]

Kiibohd works with Teensy 3.1: https://github.com/kiibohd/controller

[Findecanor]

You could take a look at the Red Scarf III. It is a DIY keyboard kit with backlighting but with an extra column on the right and no extra space between keys. Actually, the three rightmost columns could be snapped off to get a 75% keyboard.
There is a group order on the way, but it ships only to US so you would have to get a proxy.

But of course... that wouldn't be as much of a challenge.

[Yeitso]

Sweet! Thanks joey! That looks like a winner

Yeah what would be the challage

Now im just gonna try to figure out how to program the PWM and we are all good (can you run two programs at once on the teensy?)

[Findecanor]

Nope. You will have to read up on timer interrupts and go from there.
I suppose that the kiibohd already uses one or two.