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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 = 3kOhm 3
R2 = 4kOhm 7
R3 = 470Ohm
R4 = 4-way SIL array 4kOhm 7
Capacitors:
C1 = 47µF 16V radial
C2,C4,C5 = 100nF
C3 = 100µF 25V radial
C6 = 27pF
Semiconductors:
D1 = 1N4148
D2 = LED
T1 = BD139
IC1 = PIC16F84-04/P, programmed, order code 006501-1
IC2 = 78L05
Miscellaneous:
S1-S12 = pushbutton, 1 make contact, e.g. ITT/Schadow type D6
K1,K2,K3 = 2-way PCB terminal block, lead pitch 5mm
JP1,JP2 = jumper
Re1 = 12V relay, e.g., Siemens V23057-B0002-A201
Bz1 = buzzer 5VDC
K4,K5 = 7-way SIL pinheader
Disk, source code files, order code 006001-1
PCB, order code 004003-1
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