Arduino

SET_MAX_POWER_IN_VOLTS_AND_MILLIAMPS(5, 500);               // FASTLED POWER MANAGEMENT SET AT 5V, 500MA. TO CAP THE POWER USAGE AT 500MA. BUT THEN, IN YOUR LOOP YOU HAVE: FASTLED.SETBRIGHTNESS( BRIGHT ); FASTLED.SHOW(); ///// BPM CODE END //// SHOW_AT_MAX_BRIGHTNESS_FOR_POWER();                         // POWER MANAGED DISPLAY YOU ARE CALLING BOTH FASTLED.SHOW() AND SHOW_AT_MAX_BRIGHTNESS_FOR_POWER.  I CAN GUARUNTEE YOU THAT SHOW_AT_MAX_BRIGHTNESS_FOR_POWER IS GOING TO PULL THE BRIGHTNESS DOWN PRETTY FAR FOR 300 LEDS WITH A 500MA CAP. SO, AS YOUR BRIGHT VALUE GOES UP - YOU WILL HAVE A CALL TO SHOW WHERE THE BRIGHTNESS WILL BE HIGH, SAY, 200, OR 240, OR SUCH.  THEN IMMEDIATELY AFTER THAT YOU HAVE A SHOW_AT_MAX_BRIGHTNESS_FOR_POWER WHICH WILL BE A LOT LOWER - AND THERE'S YOUR FLICKERING.

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SET_MAX_POWER_IN_VOLTS_AND_MILLIAMPS(5, 500);               // FASTLED POWER MANAGEMENT SET AT 5V, 500MA.   TO CAP THE POWER USAGE AT 500MA.   BUT THEN, IN YOUR LOOP YOU HAVE:   FASTLED.SETBRIGHTNESS( BRIGHT ); FASTLED.SHOW(); ///// BPM CODE END //// SHOW_AT_MAX_BRIGHTNESS_FOR_POWER();                         // POWER MANAGED DISPLAY   YOU ARE CALLING BOTH FASTLED.SHOW() AND SHOW_AT_MAX_BRIGHTNESS_FOR_POWER.  I CAN GUARUNTEE YOU THAT SHOW_AT_MAX_BRIGHTNESS_FOR_POWER IS GOING TO PULL THE BRIGHTNESS DOWN PRETTY FAR FOR 300 LEDS WITH A 500MA CAP.   SO, AS YOUR BRIGHT VALUE GOES UP - YOU WILL HAVE A CALL TO SHOW WHERE THE BRIGHTNESS WILL BE HIGH, SAY, 200, OR 240, OR SUCH.  THEN IMMEDIATELY AFTER THAT YOU HAVE A SHOW_AT_MAX_BRIGHTNESS_FOR_POWER WHICH WILL BE A LOT LOWER - AND THERE'S YOUR FLICKERING.