SCL
SDA
AREF
GND
13
12
~11
~10
~9
8
7
~6
~5
4
~3
2
1
0
IOREF
RESET
3.3V
5V
GND
GND
VIN
A0
A1
A2
A3
A4
A5
DIGITAL (PWM ~)
POWER
ANALOG IN
UNO
CH340G
ATMEGA328P
−
−
+
+
−
−
+
+
1
1
5
5
10
10
15
15
20
20
25
25
30
30
j
j
i
i
h
h
g
g
f
f
e
e
d
d
c
c
b
b
a
a
TH1 · 10 kΩ NTC
U1 · Arduino UNO
R1 · 10 kΩ
U1 · Arduino UNO
TH1 · 10 kΩ NTC
R1 · 10 kΩ
2
2
4
4
6
6
8
8
f
f
h
h
i
i
j
j
MODEL · DC simulation
USB 45.1 mA
249 µA
249 µA
4.99 V
2.49 V
0 V
0 V
0 V
−
−
+
+
−
−
+
+
1
1
5
5
10
10
15
15
20
20
25
25
30
30
j
j
i
i
h
h
g
g
f
f
e
e
d
d
c
c
b
b
a
a
SCL
SDA
AREF
GND
13
12
~11
~10
~9
8
7
~6
~5
4
~3
2
1
0
IOREF
RESET
3.3V
5V
GND
GND
VIN
A0
A1
A2
A3
A4
A5
DIGITAL (PWM ~)
POWER
ANALOG IN
UNO
ATMEGA328P
CH340G
U1 · Arduino UNO
R1 · 10 kΩ
TH1 · 10 kΩ NTC
U1 · Arduino UNO
TH1 · 10 kΩ NTC
R1 · 10 kΩ
2
2
4
4
6
6
8
8
f
f
h
h
i
i
j
j
MODEL · DC simulation
USB 45.1 mA
249 µA
249 µA
4.99 V
2.49 V
0 V
0 V
0 V
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