virtualdave
Well-known member
Hi all,
Need some advice, and curious if it's even feasible. I'm working on a project with a t3.2 at the center, using the fastLED library to drive a bunch of ws2812 LED's. No issues controlling the LEDs as needed via the Teensy. I believe my issues are electrical. I have 8 "clusters" of LEDs, with 16 LEDs in each cluster. D-out from 1 cluster connects to D-in of the next cluster (i.e. daisy chained). There's roughly 12' of cable between clusters. Power is injected separately into each cluster. Ground is shared among all components. Using a 74HCT245 Level Shifter at the Teensy. Issue: by the time I get to the 7th or 8th cluster, I start to get flicker. Plenty of power in each cluster, so guessing the issue is that the digital signal isn't "strong" enough by the time it gets to the last couple clusters.
Question: would it be possible to amplify the digital signal just before it leaves each cluster to help ensure a good signal by the time it gets to the end? Or does anyone have any pointers on how best to ensure the signal gets all the ways to the end? My hope was that it would get a boost of some sort leaving each LED, but doesn't appear to the be the case (at least with these LEDs).
Thanks in advance for any pointers,
David
P.S. currently using 28awg wire for data signal. Thinking of going to 26awg. Will certainly test, but curious if smaller gauge wire could theoretically help as well.
Need some advice, and curious if it's even feasible. I'm working on a project with a t3.2 at the center, using the fastLED library to drive a bunch of ws2812 LED's. No issues controlling the LEDs as needed via the Teensy. I believe my issues are electrical. I have 8 "clusters" of LEDs, with 16 LEDs in each cluster. D-out from 1 cluster connects to D-in of the next cluster (i.e. daisy chained). There's roughly 12' of cable between clusters. Power is injected separately into each cluster. Ground is shared among all components. Using a 74HCT245 Level Shifter at the Teensy. Issue: by the time I get to the 7th or 8th cluster, I start to get flicker. Plenty of power in each cluster, so guessing the issue is that the digital signal isn't "strong" enough by the time it gets to the last couple clusters.
Question: would it be possible to amplify the digital signal just before it leaves each cluster to help ensure a good signal by the time it gets to the end? Or does anyone have any pointers on how best to ensure the signal gets all the ways to the end? My hope was that it would get a boost of some sort leaving each LED, but doesn't appear to the be the case (at least with these LEDs).
Thanks in advance for any pointers,
David
P.S. currently using 28awg wire for data signal. Thinking of going to 26awg. Will certainly test, but curious if smaller gauge wire could theoretically help as well.
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