This is my first Raspberry Pi project that involves an LED ring with button control, and I have some very basic questions.
I am making a halloween costume with a Raspberry Pi and this SparkFun Lumenati 8-Pack LED. I don't really need it to be perfect, and am not too worried about dim LEDs, so my question is, can I power it directly from the Pi's 5v pin and ground? In a tutorial I found, they use a PCA9306 Level Translator Breakout, in this configuration. Should I bite the bullet and buy the breakout?
Additionally, I want to use a portable phone charging pack to power the RPI. It is 5V so I feel like it should work. I would plug it directly into the USB so I don't think I would need a voltage regulator. Thoughts?
Lastly, I'd like to have a button connected to the RPI that cycles the LED ring between 3 modes: flashing blue, flashing green, and flashing red. Should I connect the button to certain GPIO ports?
Thanks so much in advance.