The TM1814 supports setting the driving current per Channel between 6,5mA and 38mA. Because of that for higher power applications i chose exactly this IC. But i found out in the wrapper.h that WLED sets it constant to 22,5mA. Would be great to make this available to the settings. Otherwise i need to change Source Code and compile on my own. Which is very inconvenient.
my new driver supports that, you can compile this PR New LED hardware driver: WLED Pixel Bus by DedeHai · Pull Request #5704 · wled/WLED · GitHub
Thank you! Perfect! Does it also Support asigning the 4 Channels for example as one White Channel?
Currently i dont have the time for setting up the environment and compile. But maybe next months. Iam a hardware power electronics engineer, so i dont have the tools directly on hand.
If you are interested and/or the community i might also provide the gerber files etc. The PCBA uses 9V 2835 LEDs and parallels the Outputs of the TM1814 to increase current. This makes 1 Watt White Pixels in high Quality high CRI possible. The beam can be focused to 10 degree. I tested at least 10 different chinese optic suppliers. Currently a new revision is in work.
The old Version down below ist realized with WS2811 parallel 3 CH, which also works fine, but current is just enough for 0.5W. this works fine on a double sided Common FR4 PCBA, the TM1814 Pixels will be Aluminium Substrate single sided PCBAs.
not yet. it can do that for standard types but the TM1814 requires a special prefix of 64bits and uses a special formula to calculate that prefix from brightness setting. This is not supported for custom color channel config. The driver has most of the underlaying structure to add support but I need to think about what the best way to implement it would be to get this flexibility without overcomplicating things.
Got it!
If you need any advice or review or any Support in hardware testing, Just ask for it.
In the meantime i can Just use it as rgbw 4ch and Set it to White, which should also drive all 4 Outputs at the Same 8bit value. Thats not perfect but works.
By the way, Titan Micro also mentions what iam doing to increase current in their Datasheet.
I updated the driver and the UI, it now supports customizing any LED type