Hardware Reference
In-Depth Information
MADE
IN I TALY
DIGITAL
(PWM
~
)
-
+
1
5
10
15
20
25
30
L
UNO
A
B
C
D
E
TX
RX
ON
ARDUINO
RESET
ICSP
F
G
H
I
J
1
5
10
15
20
25
30
POWER
ANALOG
IN
Figure 9-15
SonMicro RFID reader attached to an Arduino
via I2C, normal position on the breadboard. The
module sits in the same position on the board for
the USB-to-Serial adapter circuit as well.
+5V
+5V
+5V
RF Vcc
Vcc
RF GND
ANT2
RF GND
ANT1
RF GND
O2
O1
I2
I1
RESET
ERROR
OK
Antenna
4.7k
Ω
SonMicro
RFID reader
to A5
I2C SCL
I2C SDA
UART RX
UART TX
to A4
Figure 9-16
SonMicro RFID reader schematic. The I2C con-
nections need pullup resistors. These resistors
are built into the TinkerKit shield and the Spark
Fun shield.
GND
