3
Power Management
3.1 5V DC Supply
There are multiple
5V
DC
supply available on the board, which one can use to power
multiple devices easily and there will be no need to divide the supply further.
3.2 3.3V header
This header is a group of pins that provide
3.3V
DC
supply. Maximum of
800 mA
current
can be drawn from these pins, but if high current is drawn from these pins, it will also
affect the power delivered to ESP32 and will reduce its Wi-Fi signal strength.
3.3 EXT_PWR header
This header is a group of pins where the eYFi-Mega board can be powered by an External
DC Supply. These pins are divide into
VIN
and
GND
each having
four
pins. The
positive
terminal of External DC Supply should be connected to any of the four
VIN
pins and the
negative
terminal should be connected to any of the four
GND
pins. The External DC
Supply Voltage should strictly be within the range
7.0 V
DC
to 21.0 V
DC
.
When the board is powered from External DC Supply, typically
1A
and maximum
2.5A
current can be drawn from the
5V
pins. But if current more than
1.5A
is drawn from the
5V pins, one has to use cooling mechanism as the board will become hot on drawing
larger currents.
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