Audio Switchbox
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
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Component list
R1,R4,R7,R10 = 330kOhm
R2,R5,R8,R11 = 15kOhm
R3,R6,R9,R12 = 22kOhm
R13 = 120Ohm
Capacitors:
C1-C4 = 1µ F 63V radial
C5 = 1000µ F 16V axial
Semiconductors:
D1,D2 = BAT85
D3-D6 = 1N4148
T1-T4 = BC547B
Miscellaneous:
K1-K8 = cinch (RCA) socket, chassis mount
S1,S2,S3 = pushbutton
Re1,Re2 = RALD12W-K (12 V/960 Ohm ) Takamisawa (Conrad # 50 33 98-60)
BT1 = 9V battery with clip
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