circuit mainly by the pulse generator and a decade counter circuit. Pulse generator and external elements by NE555 multivibrator, when you press the button S1 when Q1 turns on, the output pulse NE555 3 feet, then five turns the output CD4017 output high, resistors and transistors by different combination, can drive seven LED light to indicate the number of points 1-6 points.
5.Component list:
serial number |
Component |
Value |
Label |
serial number |
Component |
Value |
Label |
01 |
resistance |
470R |
R8 R9 R10 |
11 |
audion |
S8050 |
Q2 Q4 Q5 |
02 |
|
1K |
R7 |
12 |
|
S8550 |
Q1 Q3 |
03 |
|
10K |
R3--R6 R12--R16 |
13 |
IC socket |
8PIN |
U1 |
04 |
|
3.3M |
R2 |
14 |
|
16PIN |
U2 |
05 |
|
4.7M |
R11 |
15 |
IC |
NE555 |
U1 |
06 |
|
10M |
R1 |
16 |
|
CD4017 |
U2 |
07 |
capacitance |
104P |
C2 |
17 |
Terminal |
XH2.54 2P |
J1 |
08 |
|
1uF/50V |
C1 |
18 |
Power line |
XH 2P |
1 |
09 |
LED |
Ф5Red |
D1--D7 |
19 |
PCB |
FR-4 |
74*35mm |
10 |
touch touch switch |
6*6*5 |
S1 |
20 |
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