Hi all,
I'm new here, great forum/software here!
After some research I decided to buy components to build a HDMI source ambilight add-on for my TV.
Had a PI 3 already, so bought the following:
- 5V 10A power supply
- HDMI Splitter
- HDMI2AV converter
- USB 2.0 video grabber (chip: UTV007)
- 5m 6 LED per meter WS2813 LED strip
- Level Shifter (3V to 5V) 74AHCT126
As you can see I want to drive the strip directly from the PI.
Most projects use the WS2812B or earlier, but I wanted to have the advantages of the WS2813.
They seemed to be interchangeable, but after some testing this does not seem to be the case entirely.
Current setup:
- PI 3 with raspbian
- Strip cut a 188 leds
- PC (win10 HyperCon) > HDMI2AV > Grabber > PI
- Power supply > Level shifter / WS2813 (power on one side for now)
- PI GPIO18 > Level shifter
- Level shifter > WS2813 DI
Results so far:
- Connection with PI is working
- Installed Hyperion on PI using HyperCon
- Without the level shifter I got some colors, but not the right ones and something that looks like the booteffect.
- With the level shifter I usually get "white" light with some colored leds and no boot effect.
- Can grab screen, seems OK.
Current problems:
- Can't get any logical colors from the strip, tried different byte orders.
- Some leds are flickering.
- Can't get static color by use of color picker.
Question:
Is it possible to drive the WS2813 by using the Hyperion PWM driver? I did (eventually) read soms hints in a few threads stating the SPI driver should be used for the WS2318, is this true?