- on Hobby & Modelling
- Published in issue 7/2014 on page 44
“Old riddles never die”
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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.
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
R1,R8–R13 = 270Ohm
R2–R5,R7,R14–R19 = 10kOhm
R6 = 100Ohm
C1 = 1nF
C6,C7 = 100nF
C3 = 100µF 50V radial
C5 = 1µF 50V radial
IC1 = ATtiny2313-20PU, programmed, Elektor Store # 130354-41
IC2 = 74HC138N
IC3 = SN74HC148
IC4 = MC78L05Z
LED1–LED14 = LED, 3mm
D1 = 1N4148
T1 = BC547
BZ1 = buzzer, Kingstate (15027377)
S1–S7 = pushbutton, PCB mount, Omron B3F-1070, 6x6x9.5mm (959698)
S8 = slide switch, SPDT, PCB mount (674357)
K1 = 2-pin pinheader
K2 = not used, optional
9V battery clip + wires
PCB # 130354-1
Numbers in round brackets are Newark/Farnell order codes