NOTES

* After plugging in a brand new Riskeyboard 70 Revision 2 PCB it was using ~340mA.
* With the display plugged in the default configuration (50 brightness) it's ~450mA.
* With the LEDs off (and the MAX7219 display plugged in) it uses 220mA (doesn't go up/down).
* With all LEDS white at max brightness + display it uses 3A.
* At the lowest brightness setting (with display): ~0.300mA.