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Page 6
1. Power supply
Figure 1-2:
Battery power supply
Figure 1-3:
Screw terminals power supply
Figure 1-1:
USB power supply
The mik for STM32 ARM
®
board can be powered in three different ways: via USB connector using MINI-B USB cable provided
with the board
(CN4)
, via battery connector using Li-Polymer battery
(CN5)
or via screw terminals using laboratory power supply
(CN3)
. After you plug in the appropriate power supply turn the power switch ON
(SW1)
. The USB connection can provide up to 500mA
of current which is more than enough for the operation of all on-board modules and the microcontroller as well. If you decide to use
external power supply via screw terminals, voltage values must be within
2.5-12V DC
range. Power
LED ON (GREEN)
indicates the
presence of power supply. On-board battery charger circuit
MCP73832
enables you to charge the battery over USB connection or via
screw terminals.
LED diode (RED)
indicates when battery is charging. Charging current is ~250mA and charging voltage is 4.2V DC.
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