The instructions on four digital clock:
The clock will display 12:59 when it is electrified,two alarm clock will be opened by
default and the first alarm clock set at 13:01,the second alarm clock set at 13:02.
Short press S2 can switch the timing interface between hour-minute and
minute-second after it is electrified;long press S1 enter the system setting menu which
have 9 submenus(A,B,C,D,E,F,G,H,I),submenu will transform between A to I when
short press S1 and will turn back to the timing interface in the end.
A Submenu
Correction for hours
Press S2 plus one,after
adjusted,short press S1
save
and
exit
this
submenu,at the same time
enter B submenu
B Submenu
Correction for minutes
Press S2 plus one,after
adjusted,short press S1
save
and
exit
this
submenu,at the same time
enter C submenu
C Submenu
Hourly chime switch
The default state is
ON(8:00~20:00),Press S2
can switch between ON
and OFF(turn off the
hourly chime switch),after
adjusted,short press S1
save
and
exit
this
submenu,at the same time
enter C submenu
D Submenu
The first alarm switch
E Submenu
Set the hour of the first
alarm
F Submenu
Set the minute of the first
alarm
G Submenu
The second alarm switch
H Submenu
Set the minute of the
second alarm
I Submenu
Set the minute of the
second alarm
The default state is
ON,Press S2 can switch
between ON and OFF(turn
off
the
first
alarm
switch).If set to ON,short
press S1 save and exit this
submenu,at the same time
enter E submenu;If set to
OFF,short press S1 save
and exit this submenu,at
the same time enter G
submenu
Press S2 plus one,after
adjusted,short press S1
save
and
exit
this
submenu,at the same time
enter F submenu
Press S2 plus one,after
adjusted,short press S1
save
and
exit
this
submenu,at the same time
enter G submenu
The default state is
ON,Press S2 can switch
between ON and OFF(turn
off the second alarm
switch).If set to ON,short
press S1 save and exit this
submenu,at the same time
enter H submenu;If set to
OFF,short press S1 save
and exit this submenu,at
the same time turn back
to the timing interface
Press S2 plus one,after
adjusted,short press S1
save
and
exit
this
submenu,at the same time
enter I submenu
Press S2 plus one,after
adjusted,short press S1
save
and
exit
this
submenu,at the same time
turn back to the timing
interface
Second correction: short press S2 enter minute-second timing interface,long press S2
can make second return to 0,after returning second to 0,short press S2 twice to check
whether second is on time.
Attention: PR1 Resisters Packs has direction,a sense of words in the direction of
the single chip microcomputer.Please note that during installation!
Four digital clock component list and schematic diagram and a description
NO.
Name
Type/sp Serial
NO.
Name
Type/sp
ecificati number
ecificati
on
on
01
resistan 10K
R1
10
Tact
6*6
ce
switch
02
10K
R2
11
6*6
03
capacit 30P
C2
12
IC
20PIN
ance
socket
04
30P
C3
13
SCM
AT89C
2051
05
104P
C4
14
Buzzer 5V
active
06
10uF
C1
15
Nixie
Four
tube
bits
(red)
07
Resister 1K
PR1
16
binding 2 core
s Packs
post
08
crystal
12MHz Y1
17
PCB
52*42
oscillat
board
mm
or
09
triode
8550
Q1
18
instruct
ions
Serial
number
S1
S2
U1
U1
LS1
DS1
J1
1
1