LED choices for the bottom of the Infinity Ergodox PCB?

[roblikesbrunch]

Hi there,

I'm going to be receiving an Infinity Ergodox kit soon, and wanted to order some LEDs for it. I'm building it with ALPS (Matias) switches, so mounting round LEDs on top of the PCB is not an option. However,
I saw here https://www.keychatter.com/2016/01/26/featurette-first-impressions-of-the-infinity-ergodox/ that you can mount the LEDs on the bottom of the PCB. Can anyone confirm this (although I can't imagine it not to be the case, given that you just put the LED through the holes the other way around...)

This is my first time building a keyboard, so I'm not exactly sure what I need to be wary for in terms of buying LEDs and whatnot. I looked at the data sheet for the LED controller (http://www.issi.com/WW/pdf/31FL3731C.pdf) and it just states that the voltage requirements for the LEDS have to be in the 2.7 - 5.5 V range, and that the typical current it supplies is 3.2 mA. I don't think I need any resistors or anything like that, but would appreciate confirmation.

Now, what I'd like to do is get a few different colored LEDs and set-up a sort of "rainbow" effect with each column being a different color, as you see often with winkeyless keyboards. What I'm concerned about is differences in brightness outputs between the different colors. Is that an actual issue or should I be okay?

Finally, I don't know where to buy 2x3x4 LEDs. Can anyone recommend a good source? Is there a "series" of 2x3x4 LEDs that just vary in color but not in brightness?

Thanks!

Edit: Can anyone comment on using cycling RGB LEDs for underlighting on keyboards? I imagine that after a short while they quickly get out of phase with each other, seems like it might looks pretty neat.

[roblikesbrunch]

Bump

[Gatix]

I bought my 2x3x4 LEDs from Aliexpress but I'm from Asia.. There's a few in Amazon.

[Data]

I get mine from AliExpress too.  /shrug

Search for OVTAI and they'll come right up.  Shipping takes a few weeks but it's worth it, and if you're in the same Infinity Dox drop as I am, you've got time.

You won't be able to use RGB LEDs in this build.

[tacnificent]

through hole RGBs has 4 leads (one for ea. color and ground) so not sure you're able to add RGB in that sense and I don't believe there are pads to solder in SMD either.

Also not sure the LED controller can facilitate multiple colors/resistances or just able to accommodate any one color. I'd be curious to find out myself as I'm also in that drop.

[Gatix]

Based from their FAQs it's single color only.

https://input.club/knowledgebase/infinity-ergodox-faq