it looks like you might have a small conflict at SW4 unless one LED is rotated 180.The Circle marked in dark Blue is the Clearance Marker, the one in light Blue is the actual Copper.
That being said, the Green and Blue channels are swapped on my variant.Thank you for the Heads-up.
Currently there are'nt any Open Source RGB-Backlit Keyboards out there and no 60% RGB Keyboards in general (at least none that I am aware of).Hi there,I see that you are drawing more than 2 layers right?
Project-Aurora is an attempt at fixing both of these issues.
https://github.com/Project-Aurora/Project-Aurora (https://github.com/Project-Aurora/Project-Aurora)
Since I lack the resources and experience required to go the more traditional "test first, publicise later" approach I don't have much to show right now except for some Screenshots of the PCB.
(Attachment Link)
Before ordering prototypes I would like some feedback about the Design, Error-Sources, Improvements, Suggestions, that sort of stuff.
If you have any Questions feel free to ask them, you can open Issues/Pull-Requests on Github as well.
Just an FYI for everyone that's going to be designing RGB LED boards:Hey bro,how much does it cost per unit ya? MOQ?
The 4 pin RGB LEDs I had custom ordered are different from the ones that Kailh/Razer use. Mine are lower profile and don't interfere with Cherry profile keycaps. That being said, the Green and Blue channels are swapped on my variant.
I do plan on stocking this variant of 4pin RGB LED in the long run, so I hope there won't be confusion when designing PCBs.Show Image(http://puu.sh/nSqBz/cda870fe24.jpg)Show Image(http://puu.sh/nSqD3/0d075ed183.png)
I will take comparison pictures later.
Where can you get the LED driver IS31FL3732 in a quantity less than 2,500?I contacted the Manufacturer and asked for samples, they sent some to me without any further Complications.
Any plans to offer this as a group buy? I'd buy this in a heartbeat.Not sure if it' even going to work, I will probably have all the components in about 2 Weeks.
have you tested whether it is possible to get everything in two layer instead of 4-layers? as 4-layer board cost twice the amount of a 2-layer boardYes, it's possible. Problem is that you would need an enormous amount of Vias, I'm not really a fan of them.
How about to add load capacitors to lines for the crystal. See chapter 25 Ocillator of the K20 reference manual.Input Club is using the same MCU without Capacitors on the Oscillator, seems to work fine for them.
You can refere the circuit diagram of FRDM-K20D50M board from NXP. Its MCU is little bit different from the one you have choosen but its from the same MCU family.
I'm also very interested in a 65% (68-key) version of this board. I suppose I could take a crack at modifying the PCB myself, but I've never worked on anything this complex before.
Someone mentioned a limit of 32 LEDs per chip. I guess that means I'd need to add a 3rd for those last 4 switches? Or is there maybe some kind of workaround?