Schematics

7/65
/0
2
4
31
;7
0
1
7(67
/('
%
/
X+
1
*1'
1
9
1
1
2
2
4
5
6
73
MIC2
MIC4013
1
3
2
4
67$1'%<
KEYB
1
TXD0
2
RXD0
3
GPIO5
4
GPIO4
5
GPIO0
6
GPIO2
7
GPIO15
8
GND
16
RST
15
ADC
14
EN
13
GPIO16
12
GPIO14
11
GPIO12
10
GPIO13
9
VCC
TUYA1
TYWE3S
1
2
3
4
5
6
18
17
16
15
14
13
19 20 21 22 23 24
12 11 10
9 8 7
8
5
EN
3
IN
6
BS T
2
SW
4
FB
1
GND
8
MP1470
1
VOUTA
2
VINA-
3
VINA+
4
VS S
5
VINB+
6
VINB-
7
VOUTB
8
VDD
U3
C1
22uF/16V
R1 .
&
22uF/16V
5
.
R3
.
5
.
5 N
5 
&

&

5N
5N
5.
5
100K
&

5
0
5
N
&

1
2
3
6:6
SIP-3
'
796Y
55
1
2
3
4
0
CN1
SIP-5
55
&

&

&

1
3
2
4
02'(
KEYB
1
3
2
4
/0
KEYB
1
3
2
4
&2/25
KEYB
1
3
2
4
/0
KEYB
&

&

&

&

+3.3V
+3.3V
AUDIO
+3.3V
DOUT
+12V
3:0
AUDIO
TX
RX
7;
5;
+3.3V