HT7612/HT7612B
R10
D
S
R1
56K
C3
R2
2
OP1N
ZC
15
R9
1M
14
W1
13
Buzzer
Jumper
C12
2.2uF
D2
D3
2
3
Rfb
10
MODE
12
GND
6
Vref
R6
1M
C4
1uF
C8
3nF
8
VSS
VDD
9
1
7
TD
TRIAC
10
VCC
RELAY/LED
11
R7
1M
3
OP1O
BUZ/LVD
C6
0.02uF
22K
R3
22K
4
OP2N
R5
1M
C7
0.02uF
5
OP2O
22uF
C2
22uF
G
PIR
C1
0.02uF
CDS
D1
D4
1N5819
L1 10uH
OP1P
TEST/SC
1
16
R8
680K
1M
1
SW
GND
FB
HT7939
VIN
OVP
EN
6
5
4
Rsh
100K
C11
22uF
GND
BUZB/CDS
HT7612/HT7612B
ON
AUTO
2
3
OFF
C10
0.1uF
C9
100uF
4.5V
Battery
4.5V DC Power Application Circuit
GND
Adjust R9 to fit various CDS.
Adjust R6 to obtain the desired output duration.
Adjust R5 to change PIR sensitivity.
Rev. 1.50
Note:
12
February 21, 2011