Fast LED on an Adafruit Jewel with a Gemma2 - the pixels appear to

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(Patty L) #1

Fast LED on an Adafruit Jewel with a Gemma2 - the pixels appear to flicker. Are there parameter tweaks or timing tweaks needed?

(Daniel Garcia) #2

you may very well be running at a low enough frame rate that you’re seeing dithering - add .setDither to your addLeds line(s), for example:

FastLED.addLeds<NEOPIXEL,4>(leds,NUM_LEDS).setDither(0);
(Erin St. Blaine) #3

I’ve been noticing the same problem. Gonna try this…thanks!!

(Patty L) #4

Thanks for the suggestion. I still see the flickering as the LEDs fade in/out. At 5238 bytes/5310 (98%).

(Stuart Taylor) #5

hi @Patty_L how are you powering this?

(Evan Bruno) #6

I have seen flickers in a few different applications that I have tried. And each time a ground wire running from the end of the line running back to the beginning solved it every time. Also make sure that your ground is shared between the power source and the arduino or whatever you are controlling the array with.

(Patty L) #7

I powered using microUSB and also a LiPoly. I had to reprogram the bootloader on my Gemma2 and then re-upload the Jewel program. Now the flickering is gone! Thanks for the suggestions.