- on Audio/Video/Photography
- Published in issue 12/2001 on page 0
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CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor 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. Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.
R1,R4,R7,R10 = 1MOhm
R2,R5,R8,R11 = 3kOhm 9
R3,R6,R9,R12 = 1kOhm 2
C1 = 4µF7 63V radial
D1-D4 = 1N4148
T1-T4 = BC547B
JP1 = wire link (see text)
K1-K5 = cinch socket, PCB mount, e.g., Monacor/Monarch # T-709G
Re1-Re4 = mini relay, 2 c/o contacts, e.g., Conrad Electronics # 505170-24 (12V, 720Ohm )