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WUBBSY / RGBDeck

RGB Lighting for the Valve Steam Deck
MIT License
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SPI points #2

Open The-Synthax opened 2 weeks ago

The-Synthax commented 2 weeks ago

Hello,

I'm interesting in exploring a solution to the power draw issue, but I noticed that the instructions were never updated for doing an SPI install. I may design a QSB for this, but it would be good to know where SPI is for finer control and integration. Maybe tap into the backlight brightness signal as well for optional integrated brightness control.

The-Synthax commented 2 weeks ago

Ah there we are, found them in one of CalcProgrammer1's Reddit posts. I'm thinking about trying to make this solderless, but maintain good integration. image

WUBBSY commented 2 weeks ago

Hi, nice to see some interesst here!

I had to search a bit but I found the original picture with the I2C pinout IMG_0219

I still to this day hadn't had a issue with the power delivery over the controller USB. Even with my 111 LED upgrade. I tinkered with using the Battery directly and using the controller USB only via a MOSFET to switch on the Pololu S13VxF5 voltage regulator Here is also a very simple pinout of the battery. image

This worked somewhat while the Steam Deck was running but it would not wake up again after sleep until everything was disconnected. IMG_2524 image

The-Synthax commented 2 weeks ago

What's the amperage draw of those 111 LEDs if they were to all run white at maximum brightness? I calculated the 15 WS2812s should have been roughly 0.9A, so I imagine 111, even if they used a fraction of the power each, should draw a fair bit more than that. I'm thinking it could have been a false alarm, maybe one of his enameled wires got pinched against a ground point and shorted or one of the voltage pins on the LED strip touched something grounded? Hard to say without doing a post-mortem on it.

WUBBSY commented 1 week ago

I run them pretty low. I think it was something like 5%. And if I remember correctly it only had a total of around 100-150mAh current draw in the Rainbow mode. But it still make for a really nice effect and has a pleasant brightness. The next weeks I'm pretty busy but after that I really have to rewrite the readme and could also retest the current draw etc.

But yes I also suspect that it might have been a different problem that caused the fault since I didn't have any problems. I also shorted some stuff with the constant dis- and assembly as well as soldering directly on the Steam Deck. But the worst that happened was that the corresponding controls didn't work until the short was cleared. But then again the shorts didn't happen on the USB line itself.