Table of Contents
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1. Power supply
Figure 1-1: Connecting USB
power supply
USB
power supply
You can supply power to the board with a micro USB cable provided
in the package. On-board voltage regulators provide the appropriate
voltage levels to each component on the board. Power LED (GREEN)
will indicate the presence of power supply.
NOTE
Some click boards need more current than the USB connection can supply. For 3.3V clicks, the upper limit is 750 mA; for 5V clicks, it's 500
mA. In those cases you would need to use the battery as the power supply, or the vsys pin on the side of the board.
Battery power supply
You can also power the board using a Li-Polymer battery, via onboard
battery connector. On-board battery charger circuit enables you
to charge the battery over USB connection. LED diode (RED) will
indicate when battery is charging. Charging current is ~300mA and
charging voltage is 4.2V DC.t
Figure 1-2: Connecting
Li-Polymer battery
Page 7
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