Schematics
1 2 3 4
A
B
C
D
654321
D
C
B
A
U2
1
2
3
4
5
6
7
8 9
10
11
12
13
14
15
16
CH4
R4
100R
R5
100R
R13
1K
R3
100R
DW2
SW-PB
K8
SW-PB
K3
SW-PB
K1 -10
K1 -10
3.3V
1
2
3
J1
1
2
3
J3
1
2
3
J4
1
2
3
J6
3.3V
3.3V
3.3V
3.3V
CH1
CH1
CH2
CH2
CH3
CH4
BUZZ
R17
1K
Q1
8050
BATT
BUZZ
BUZZ
BATT
KG1
BT1
C8
106P
3.3V
GND
E
Vi
B
Vo
C
U1662K/3V3
K9
SW-PB
K1 0
SW-PB
K4
SW-PB
R6
100R
R10
200R
R7
100R
CH3
R2
10R
C6
104P
K5
SW-PB
C5
104P
C7
106P
NY8B062D
3.3V
R8
100R
R9
200R
DW1
SW-PB
K2
SW-PB
R1
2R2
R14
1K
K7
SW-PB
R15
1K
R12
1K
LED1
C2
0.5P
L1
4.7NH
CSN
SCLK
MIOS
ANT
R11
510R
C2
33pF
C3
33pF
2
1
3
4
Y1
16MHZ
1
2
3
4 5
6
7
8
297L
C4
104P
U3
CSN
SCLK
MIOS
K6
SW-PB
R16
1K
K1
SW-PB
3.3V