M I K R O E L E K T R O N I K A S O F T W A R E A N D H A R D W A R E S O L U T I O N S F O R T H E E M B E D D E D W O R L D
EasyAVR
USB
4
EasyAVR4 User
’
s Manual
MikroElektronika
Development
tools
1
10
0
page
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As a power supply source, users can select either a regulated supply from the USB cable
(default) or an external power supply. In case of the USB power supply, the system should
be connected to a PC using the USB programming cable, while the jumper J10 should be
set in the right-hand position.
In the case of an external power supply, the EasyAVR4 board pr5V using an
LM7805 voltage regulator. The external power supply can be AC or DC, with a voltage
between 8V and 16V and the jumper J10 should be set in the left-hand position. In Fig. 7
you can see USB and external power supply connectors.
GND
Vin
Vout
VCC
CN7
8-16V (AC/DC)
+
E1
470uF
C2
100nF
E3
470uF
C9
100nF
1
2
VCC
D-
D+
GND
5V
5V
USB
FP1
1
2
3
USB
y
Power Suppl
External Power Supply
EXT
EXT
USB
USB
REG1
7805
J14
C1
100nF
POWER SUPPLY
J10 in the left-hand
position: system will
take power from the
external AC/DC
power adapter.
J10 in the right-hand
position: system will
take power from the
USB cable.
USB and power supply connectors
Figure 7.
Figure 8.
Power supply select jumper
Figure 9.
J10 is set to USB power supply
EXT
USB
USB
connector
USB
connector
External power
supply connector
POWER SUPPLY
SELECTABLE
POWER SUPPLY
SELECTABLE
