27
Beeper
The Figure below lists the Beeper driver circuit. The BUZZ signal is from the pin 9.
2N3904
Q8
AS903Q
LS1
1
2
R5
10
R6 10
R7
10K
VDD
BUZZ
BAT760
D2
Figure 4-7
Trigger
The Figure below lists the Trigger driver circuit. The nTRIG signal is from the pin 12.
Figure 4-8