Schematics

+12V
Y1
26MHZ
1
XTAL
2
GND
3
DATA
4
SCL
5
TX
6
VCC
U4
CMT2110A
C10
2.5P
L2
68nH
C11
12P
L3
68nH
C12
6P
L4
39nH
L5
NC
C9
105
1
2
3
4
P2
1.25-4PIN
1
2
3
45
6
7
8
U2
R2
27K
R3
1K
Q1
M6
C1
104
R1
5.6K
D1
LED-R
S3
SW-PB
C14
104
1
P1
P3
1
P3
P3
1
P4
P3
1
P5
P3
L1
100nH
R6
270K
S2
SW-PB
R5
4.7K
TXD
SCL
TXD
SCL
+3V
+3V
TXD
301