Schematics

GND
GND
GND
GND
GND
GND GND
GND
GND GNDGND
5V
5V
GND
GND
GND
GNDGND
GND
5V
VIN
GND
GND
VIN
ATMEGA328P_TQFP
GND
AP2112-3.3V
1.0uF
GND
5V 3.3V
3.3V
GND
GND GNDGND
0.1uF
VCC VCC VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
5V3.3V
3.3V
GND
3.3V 3.3V
VCC VCC
CH340C
ADJ
IN OUT
1A*2
2A*2
3A*2
4A*2
5A*2
6A*2
7A*2
8A*2
9A*2
10A*2
1
2
3
4
5
6
7
8
1 2
3 4
5 6
1 3
42
1A*2
2A*2
3A*2
4A*2
5A*2
6A*2
7A*2
8A*2
1A*2
2A*2
3A*2
4A*2
5A*2
6A*2
PB5(SCK)
17
PB7(XTAL2/TOSC2)
8
PB6(XTAL1/TOSC1)
7
GND
3
GND
5
VCC
4
VCC
6
AGND
21
AREF
20
AVCC
18
PB4(MISO)
16
PB3(MOSI/OC2)
15
PB2(SS/OC1B)
14
PB1(OC1A)
13
PB0(ICP)
12
PD7(AIN1)
11
PD6(AIN0)
10
PD5(T1)
9
PD4(XCK/T0)
2
PD3(INT1)
1
PD2(INT0)
32
PD1(TXD)
31
PD0(RXD)
30
ADC7
22
ADC6
19
PC5(ADC5/SCL)
28
PC4(ADC4/SDA)
27
PC3(ADC3)
26
PC2(ADC2)
25
PC1(ADC1)
24
PC0(ADC0)
23
PC6(/RESET)
29
U4
IN
GND
OUT
EN
NC
U3
C16
C18
D+
D-
VBUS
GND
ID
SHIELD*10
1
2
3
4
CTS
9
DCD
12
DSR
10
DTR
13
RI
11
RTS
14
GND
1
R232
15
RXI
3
TXO
2
UD+
5
UD-
6
V3
4
VCC
16
U1
USB
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https://creativecommons.org/licenses/by-sa/4.0/
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