TRIG
2
OUT
3
RST
4
CVOLT
5
THR
6
DISC
7
VCC
8
GND
1
U2
NE555P
TRIG
2
OUT
3
RST
4
CVOLT
5
THR
6
DISC
7
VCC
8
GND
1
U1
NE555P0.01uF
C3
100pF
C2
P0
3
P1
4
P2
5
P3
6
Q0
14
Q1
13
Q2
12
Q3
11
TC
15
CEP
7
CET
10
CLK
2
PE
9
MR
1
U3
74LS161
1 2
U8A
74LS04
1 2U7A
74LS04
f
6
g
8
e
5
d
4
c
3
DP
b
2
a
1
DS1
A
7
B
1
C
2
D
6
LT
3
BI/RBO
4
RBI
5
a
13
b
12
c
11
d
10
e
9
f
15
g
14
U5
74LS47
1
R10-17
2
3
4
5
6
7
200 . 7
+5V
X0
12
X1
14
X2
15
X3
11
Y0
1
Y1
5
Y2
2
Y3
4
INH
6
A
10
B
9
VEE
7
X
13
Y
3
U4
4052
2
3
1
A
411
U6A
10K
R2
100K
Rp1
VCC
10K
R3
S1
39K
R1
100pF
C1
0.01uF
C4
+5V
+5V
+5V
-5V
100K
R4
1K
R5IN
OUT
100KR7
200KR8
300KR9
-5V
