phillipps76
Member
I would like to run between 14 and 20 1 meter strands of 144 APA102s in spectrum display and am not sure how many strands I can chain together. I will inject power as often as needed, power isn't the issue. I already bought 14 of the strands and prefer to use them as opposed to tossing them out.
There are posts that say 260 LEDs is as long as one sting of APA102s should be due to prorogation delays. And there are posts that say thousands are OK.
Here Paul highlights the problem: https://www.pjrc.com/why-apa102-leds-have-trouble-at-24-mhz/
Maybe that was not known when this was written saying it's not an issue: https://forum.pjrc.com/threads/27975-OctoWS2811-and-APA102-LED-strips
I am using the 74HCT245 for level shifting and a teensy 3.6 with an audio adaptor board and a teensy breakout board.
My plans are based on what I've been reading but hope someone can offer feadback
* It may make my life easier but I've decided to not use the OctoWS2811. I am also not sure how the OctoWS2811 would work with a Audio Adaptor, it looks like Paul is not suggesting doing so:
https://forum.pjrc.com/threads/4797...eactive-LEDs?highlight=OctoWS2811+audio+board
* I plan on using 40 pins for the clock and data over 20 strands to keep the length down to under 260 LEDs per given strand. I plan on testing before going to the trouble of soldering up 5 74HCT245
I'll keep reading and will do my own tests but I think I've scrubbed through every post on how long an APA102 strand can be before there are problems so any advice would be highly welcome.
Thanks!
There are posts that say 260 LEDs is as long as one sting of APA102s should be due to prorogation delays. And there are posts that say thousands are OK.
Here Paul highlights the problem: https://www.pjrc.com/why-apa102-leds-have-trouble-at-24-mhz/
Maybe that was not known when this was written saying it's not an issue: https://forum.pjrc.com/threads/27975-OctoWS2811-and-APA102-LED-strips
I am using the 74HCT245 for level shifting and a teensy 3.6 with an audio adaptor board and a teensy breakout board.
My plans are based on what I've been reading but hope someone can offer feadback
* It may make my life easier but I've decided to not use the OctoWS2811. I am also not sure how the OctoWS2811 would work with a Audio Adaptor, it looks like Paul is not suggesting doing so:
https://forum.pjrc.com/threads/4797...eactive-LEDs?highlight=OctoWS2811+audio+board
* I plan on using 40 pins for the clock and data over 20 strands to keep the length down to under 260 LEDs per given strand. I plan on testing before going to the trouble of soldering up 5 74HCT245
I'll keep reading and will do my own tests but I think I've scrubbed through every post on how long an APA102 strand can be before there are problems so any advice would be highly welcome.
Thanks!