Sean Meighan

Welcome => Do You Need Help? Post it here => Topic started by: dave21w on December 21, 2021, 06:43:18 AM

Title: Number of strings / pixels per output ?
Post by: dave21w on December 21, 2021, 06:43:18 AM

Hi, new here and as usual leaving everything till the last minute  :D
Anyway i'm building a small megatree, 18 strips of WS2812bs, each strip will be 1.5M long with 90 pixels, I have all my wiring sorted and mounting frame etc but before I begin I have a couple of questions.
Going to be running it using an ESP32 with WLED installed, can I have one single string of pixels which would be 1620 (power injection is sorted) or should I be breaking it up into 2, 3 or 4 seperate strings, obviously I can enable more outputs in the hardware setup on the ESP but need to make sure I get the hardware setup and build right before moving on to xlights integration.

Thanks
Dave

Title: Re: Number of strings / pixels per output ?
Post by: Gilrock on December 21, 2021, 06:53:31 AM

I'd say the more outputs the better.  How many pixels do you want to die if one goes bad?  Also there is a mathematical limit to the number of pixels that can be sent data during a time slice depending on the frame rate you are running.  I seem to remember somewhere around 600-700 pixels a Falcon board would have to drop from 25ms to 20ms updates and I can't believe an ESP32 could outperform an FPGA device.

Title: Re: Number of strings / pixels per output ?
Post by: dave21w on December 22, 2021, 01:12:25 AM

Thanks for the info