Schematics

1
1
2
2
3
3
4
4
D D
C C
B B
A A
A NTENNA
C1
68P
C2
47P
C3
201
C6
47P
Q1
C94 5P
Q2
C94 5P
L3
6.8uH
L2
2.2uH
L1
2.2uH
R4
22K
R1
100
R3
150K
TX1
27.145MHz
LED
9V
R
1
NC
2
GND
3
B
4
F
5
T
6
SC
7
SO
8
V DD
9
PC
10
OS CO
11
OS CI
12
NC
13
L
14
IC1 977
R6
220K
R5
330
C4
103
C9
104P
C7
68P
ZD1
3.3V
K1
SW SPST
R7
3.9K
T1
15.5T
C8
68P
R2
100
C5
103
C10
104
27.145MHz
SW 1
SW 2
SW 3
SW 4