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PDF DE-DP004 Data sheet ( Hoja de datos )
| Número de pieza | DE-DP004 | |
| Descripción | 4 inch Character Height 7-segment LED Information Board | |
| Fabricantes | Sure Electronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DE-DP004 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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4 inch Character Height
7-segment LED Information Board
User’s Guide
© 2004-2008 Sure Electronics Inc.
DE-DP004-Ver1.0
1 page  
Overview and Main Feature
1-2. Part Layout
Figure Top Part Layout
DE-DP004-Ver1.0-page 2
Figure 1 Bottom Part Layout
© 2004-2008 Sure Electronics Inc.
5 Page 
Hardware Detail
74HC595 is used as shift register in this board. They are U3 and U6, the parallel output of
those 74HC595 is connected to the base of ULN2003, and the collector of those ULN2003
is connected to the LED segments. CLK_OUT is driven by a buffered output from CLK_IN
with 74HC00. DATA_IN is data input pin of the first 74HC595, then all 74HC595 of
cascaded boards will be serialized. All those pins receive only CMOS signals. DIMM_IN
signal is for brightness control usage, you could add simple on/off or PWM signal on this
signal, when this signal is set to low, all segments will be lighted on if valid data is shifted out
from the 74HC595 chip. If you change the data in the 74HC595 driven chip, you should set
this pin to low in order that the hash signal will not affect the display. Of course if you want to
adjust the brightness of those LEDs, PWM signal could be applied on the DIMM_IN pin. It is
buffered with a 74HC00, and DIMM_IN signal will drive this board and next. Once you clock
in correct data through these 2 pins, and ensure that PWM signal or ON/OFF signal is
applied correctly on the DIMM_IN pin, the board will begin to display.
Correspondence between Character Codes and Character Patterns:
Character
Patterns
0
1
2
3
4
5
6
7
8
9
Character
Codes
0xfc
0x6
0
0xd
a
0xf2
0x6
6
0xb
6
0xb
e
0xe
0
0xfe
0xf6
Character
Patterns
a
b
c
d
E
f
g
h
i
j
Character
Codes
0xe
e
0x3
e
0x1
a
0x7
a
0x9
e
0x8
e
0xf6
0x6
e
0x6
0
0x7
0
Character
Patterns
l
n
o
pQ
r
s
t
u
y
Character 0x1 0x2 0x3 0xc 0xe 0x0 0xb 0xe 0x3 0x7
Codes
caae6a6086
2-5-3. Data Ports Definition
+12V
DIMM_IN
DATA_IN
J1 CON10B
16
27
38
49
5 10
+12V
CLK_IN
+12V
J2 CON10B
1
2
DIMM_OUT
DATA_OUT
3
4
5
6
7
8
9
10
+12V
CLK_OUT
Figure 8
2 IDC sockets are located on the board. They are data input and output interface, marked
as J1 and J2. The definition is shown in Figure 11. When the board is working separately,
connect J1 to the Microcontroller board and leave J2 open. If lots of same boards are in
series, connect next board’s input to previous one’s output. Then you could connect up to
DE-DP004-Ver1.0-page 8
© 2004-2008 Sure Electronics Inc.
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet DE-DP004.PDF ] | |
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