Velleman 4-Digit Display Schematic

C1 10uF C2 100nF
C3 100pF C4 100pF
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
J1
P1
*
P2
*
R1 10k R2 10k
GND
4-Digit Display
1/1Sheet:
TITLE:
Design: Check:
Date: Vision:
*
A
11
B
7
C
4
COM1
12
COM2
9
COM3
8
COM4
6
D
2
DP
3
E
1
F
10
G
5
U1
CLK
18
DIO
17
GND
1
GRID1
15
GRID2
14
GRID3
13
GRID4
12
GRID5
11
GRID6
10
K1
19
K2
20
SG1/KS1
2
SG1/KS2
3
SG1/KS3
4
SG1/KS4
5
SG1/KS5
6
SG1/KS6
7
SG1/KS7
8
SG1/KS8
9
VDD
16
U2
A
A
A1
A1
A2
A2
A3
A3
A4
A4
B
B
C
C
CLK
CLK
D
D
DIO
DIO
DP
DP
E
E
F
F
G
G
GND
GND
VCC
VCC
VCC
Fred.Chu
06/19/2013 v0.9b
CATALEX