Block Diagram

1
1
2
2
3
3
4
4
D D
C C
B B
A A
A NTENNA
A
- +
M OTOR S ERV O
A
- +
M OTOR S ERV O
V CC+7 .5V
49.860 MHz
Regulator
circuit
Super-
regenerative
detector circuit
IF amplfier
Decoding
circuit
U1 PT978
The motor drive circuit