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《Protel DXP 2004 SP2原理图与PCB设计（第2版）》范例源文件

[
C1
CAPPR1.27-1.7x2.8
Cap Pol1



]
[
C2
CAPR2.54-5.1x3.2
Cap



]
[
C3
CAPR2.54-5.1x3.2
Cap



]
[
LS?
PIN2
Speaker



]
[
Q1
BCY-W3/B.7
NPN1



]
[
R1
AXIAL-0.3
Res1



]
[
R2
AXIAL-0.3
Res1



]
[
R3
AXIAL-0.3
Res1



]
[
R4
AXIAL-0.3
Res1



]
[
Rw
VR3
Res Tap



]
[
U1
DIP8
NE555N



]
[
V1
DSO-C2/X3.3
2AP9



]
(
NetC1_1
C1-1
R4-1
U1-2
U1-6
)
(
NetC2_2
C2-2
U1-5
)
(
NetC3_1
C3-1
LS?-1
)
(
NetC3_2
C3-2
U1-3
)
(
NetR3_1
R3-1
R4-2
U1-7
)
(
VCC
R2-2
R3-2
Rw-2
U1-8
)
(
NetQ1_2
Q1-2
R1-1
V1-2
)
(
NetR1_2
R1-2
Rw-1
Rw-3
)
(
NetQ1_1
Q1-1
R2-1
U1-4
)
(
GND
C1-2
C2-1
LS?-2
Q1-3
U1-1
V1-1
)