Hitachi RAS-E10H2 - Page 34

Q141
L201
12V
IRR
VDD
Fig.2-1
Fig.3-1 Buzzer circuit
2.
Receiver Ci
rc
ui
t
IRR
(light
receiv
er
unit)
receiv
es
the
infrared
signal
from
the
wireless
remote
controlle
r.
The
receiv
er
amplifie and shapes the signal and outputs it.
3.
Buzzer Ci
rc
ui
t
When
the
b
uzz
er
sounds
,
an
appro
x
3.9kHz
square
signal
is
output
from
b
uzz
er
output
pin
30
of
the
microcomputer
.
After
the
amplitude
of
this
signal
has
been
set
to
12Vp-p
by
IC711,
it
is
applied
to
the
b
uzz
er
.
The
piez
oelectr
ic
elemen
t
in
the
b
uzz
er
oscillates
to
generate the
b
uz
ze
r’
s
sound.
GND
VOUT
C212
C211
R212
0V
0V
0V
R211
0V
ZD141
R141
R611
C611
0V
RECEIVER I/P
Microcomputer
13
BZ1
R721
12V
IC711
Microcomputer
Buzzer output
16130
BZ
Sound wave
Metal diaphragm
V
Pizoelectric element
V
Fig. 3-2 Buzzer Operation
Auto sweep motor for
horizontal air defectors
Micro computer pins
Step width : 10ms
Horizontal air deflectors
15
16
17
18
1 2 3 4 5 6 7 8
Table 4-1 Auto sweep Motor Rotation
Rotation angle per step (˚ ) Time per step (ms.)
0.0882 10Horizontal air deflectors
Fig.4-2 Microcomputer Output Signals
Fig.4-1
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