המשלוח הוא לנקודת שירות (איסוף מחנות הקרובה לביתך)
2. Parameters:
1>. Power supply voltage: DC3-12V
2>. PCB size: length 13.5CM* width 2.2CM
3. Features:
1>. It is simple and practical, and the power consumption is small, and the circuit is driven by an integrated circuit. The parts are few, and the line is simple and clear.
2>. In the process of debugging, the understanding of the principle of the circuit will be deepened.
4. Component list:
|
Component Name
|
PCB Marker
|
Parameter
|
QTY
|
|
IC Socket
|
U1
|
DIP-8
|
1
|
|
NE555
|
U1
|
DIP-8
|
1
|
|
KF301-2P Connector
|
|
|
1
|
|
Electrolytic Capacitor
|
C4
|
4.7uF
|
1
|
|
Capacitor
|
C1-C3
|
0.1uf 104
|
3
|
|
Metal Film Resistor
|
R1,R2
|
1K
|
2
|
|
Metal Film Resistor
|
R3,R4,R6-R9
|
2K
|
6
|
|
Metal Film Resistor
|
R5
|
10K
|
1
|
|
Cable
|
|
5CM
|
2
|
|
Button
|
S1-S8
|
12*12*7.3mm
|
8
|
|
Button Cap
|
|
|
8
|
|
Battery box
|
|
AA*2
|
1
|
|
Speaker
|
SP
|
8ohm 0.25W 5cm
|
1
|
|
PCB
|
|
22*135mm
|
1
|
