ICStation CAI-201 Installation Tutorial

Installation of the circuit
The components are installed from size short to high. Install size short component such as electrical resistor first and then install size high
component. When a part of the components are installed, cut off pin of the component and then install the next part of the component.
There are no positive and negative poles in electrical resistor, light sensitive resistor, thermal resistor, crystal oscillator and ceramic capacitor.
When light sensitive resistor and thermal resistor are installed, height of 1cm should be reserved and bend it.
There are positive and negative poles for buzzer, the location with plus sign on the buzzer should be face with the location with plus sign on
PCB.
After all the installation of the components are finished, and then install the integrated circuit into the tube socket, the gap location of
integrated circuit and tube socket shall be aimed at PCB marked location of the gap.
When triode, tact switch, power socket and battery holder are installed, they should be installed correspondingly according to the shape.
After all the installation of components are finished, check again if there is any mistake in the installation, check if there are phenomena such
as solder skips, cold solder joint and short circuit in the welding spot.
Connect pin header with numerating tube first and then weld numerating tube with PCB.
After making sure that there is no problem with the circuit, and then put the circuit into the shell, fix the shell with screws.
Scan the QR code to watch the video tutorial, graphic tutorial and electronic manual.
About faults
If there is a fault, please first judge whether the components are installed incorrectly, whether there is missing welding, false welding or short
circuit at the welding point. The power supply shall not exceed 5V, otherwise the IC will be damaged. Special note: acid flux cannot be used for
welding, otherwise the time will not run. Please use rosin flux. There is a drive IC inside the digital tube. It cannot be displayed when it is
directly powered on. It needs to receive a complete signal from the control board to display normally. Therefore, the pins must be firmly welded
and cannot be falsely welded. If there is false welding, the display will be missing strokes or random code, uneven brightness and other
phenomena. If the time does not run: check whether it is reset, whether DS1302, crystal oscillator and 22P capacitor are installed incorrectly, and
whether there is false welding.
Electric schematic diagram
+5V
GND
Installation tutorial of seven color digital clock（CAI-201）
http://www.diyleyuan.com/jc/201C.html
+5V +5V
GND
R_P R_T
10K 10K
R-P R-T
RT
GND
RP
GND GND
U1 STC8G1K17 DIP16
SDI 1
P1.0/ADC0/CCP1/RxD2
EN 2
P1.1/ADC1/CCP0/TxD2
R-T 3
P1.6/ADC6
R-P 4
P1.7/ADC7
D0 5
P5.4/RST/MCLKO
C02
6
Vcc
D1 7
0.1uF
P5.5
8
Gnd
+5V
Q1
R2
8550
R-B
LS1
Buzzer
10K
GND
+5V
CR1220
BT1
VBAT
3V
U2
1
8
DS1302
C1
22P
2
X1
RST
I/O
Y1
SCLK
32768
GND
X2
C2 3
22P
+5V
JK1
3
VCC
2
GND
C01
1
0.1uF
GND
USB-5V GND
GND
+5V
P2
R1 EN
10K
D0
5 D1
RST
6 SDI
IO
7
SCLK CLK
4 LE
GND
8Pin
16
P3.7/INT3
15
P3.6/ADC14/INT2
14
P3.5/ADC13/T2
13
P3.4/ADC12/T0
12
P3.3/ADC11/INT1
11
P3.2/ADC10/INT0
10
P3.1/ADC9/TxD
9
P3.0/ADC8/RxD/INT4
+5V P1
S2
GND
S2
S2
S1 S1
S1
+5V
4Pin
+5V
GND
CLK
LE
RST
IO
SCLK
R-B
S2
S1
Up
Set
GND