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Materials
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,R3 = 10k
R2,R4 = 100k
R5 = 1k
Capacitors:
C1,C3,C4 = 10µF 16V radial
C2 = 220µF 16V radial
Semiconductors:
T1,T2,T3 = BC547B (for T1 also BC549C, see text)
Miscellaneous:
S1 = on/off switch, 1 contact
Bt1 = AA battery (preferably alkali-manganese) with holder
K1 = 3.5-mm jack socket, stereo (see text)
K2 = 3-way PCB terminal block, 5mm lead pitch
PCB, ref. 040424-1 from the PCBShop
L1 = pickup coil, if necessary with ferrite core (see text)
ANT = length of wire (see text)
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