Multi-purpose IC for Modellers(1)
two printed circuit boards and nine functions

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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
Resistors:
R1 = 1kOhm
R2,R3 = see text
R4 = 3kOhm 6
R5 = 1kOhm 3
R6 = 3kOhm 6
R7 = 10kOhm
R8 = 10kOhm
Capacitors:
C1,C2 = 15pF
C3 = 100nF
C4 = 220µ F 16V radial
Semiconductors:
D1 = LED, red, low current
D2 = zener diode 5V1
D3 = BYV32-50
IC1 = 87LPC762BN (programmed, order code 010008-41)*
IC2 = LM2940-5.0
T1-T4 = BUZ71/IRLZ34N
T5 = BC548
T6 = IRF9530
Miscellaneous:
Bz1 = DC buzzer, 5V
X1 = 6MHz quartz crystal
2-way pinheader with jumper
PCB, order code 010008-1*
PCB 010008-3 (hot glow/go-slow, Fig. 4)
Resistors:
R1,R2 = 1kOhm
R3,R4 = 100kOhm
R5 = 1kOhm 3
R6 = 3kOhm 6
Capacitors:
C1,C2 = 15pF
C3 = 220µ F 16V radial
Semiconductors:
D1 = LED, red, low current
D2 = 1N4001
IC1 = 87LPC762BN (order code 010008-41)*
T1,T2 = BUZ71/IRLZ34N
Miscellaneous:
Bz1 = DC buzzer, 5 V
S1 = 4-way DIP switch
X1 = 6MHz quartz crystal
PCB, order code 010008-3*
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