8 Channel D/I Card for RS232
Materials
Gerber file
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Component list
R1 = 10k? 8-way SIL array
R2-R9 = 1k?
R10,R12 = 10k?
R11 = 4k?7
P1 = 25k? preset H
Capacitors:
C1 = 100pF
C2-C5,C11 = 100nF
C6-C10 = 10 µF radial
C12 = 330nF
Semiconductors:
D1-D8 = 1N4148
D9 = 1N4001
IC1 = 4060
IC2 = 4040
IC3 = 27C256 (see text for programming)
IC4 = 74HC151
IC5 = MAX232
IC6 = 7805
IC7-IC14 = 4N28 of CNY17-2
Miscellaneous:
K1-K8 = 2-way PCB terminal block, raster 5mm
K9 = 9-way sub-D socket (female), PCB mount
S1 = 8-way DIP switch
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