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Two LEDs let you know when its charging and done
the battery will slowly drain since the charge rate is less than the dis-charge rate
only 20 mA during navigation
The OLED and driver require a 3
plus 4 or 5 control lines (12 pins minimum) or SPI mode with 4 or 5 SPI data/control lines (4 pins minimum) - not including the touch screen
Adafruit Feather 32u4 Bluefruit LE PWM Drivers Two LEDs let you knowThis is the Adafruit Feather 32u4 Bluefruit our take on an 'all in one' Arduino compatible + Bluetooth Low Energy with built in USB and battery charging. Its an Adafruit Feather 32u4 with a BTLE module, ready to rock! We have other boards in the Feather family, check'em out here. Bluetooth Low Energy is the hottest new low power, 2. 4GHz spectrum wireless protocol. In particular, its the only wireless protocol that you can use with iOS without needing