I’m trying to whip up a little LEDness this evening for a Halloween weekend night hike. Running the current FastLED, a 32 pixel LPD8806 strip, and a Teensy 3.0.
If the Teensy is plugged into/powered by:
a) my computer, everything is normal. Reading volts across Teensy GND and Vin pins shows 4.9V.
b) a XTG Technology battery (5V 1A 1500mAh), everything is normal. Volts across Teensy GND and Vin pins reads 4.9V.
c) an Anker Power Bank battery (5V 1A 4500mAh), the displayed pixels are incorrect and animations don’t move. Reading volts across Teensy GND and Vin pins shows 5.2V. If I unplug/plug power in about 1 out of 10 times the pixels are correct for about 2 seconds and then they are drawn incorrectly and animations don’t move.
So… I’m wondering what could be the difference between these batteries and why might the larger mAh one not work with the setup? 4.9V vs 5.2V doesn’t seem like it would be the issue as Teensy should be able to run on 3.7-5.5V range.
Surprisingly this is actually the first time I’ve ever tried to run on batteries so it’s new to me. I’d love to hear what sort of similar simple battery packs you all have had success with and like to use.