Article
Binary Clock
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This design is based on the binary clock on display in a German museum the author happened to visit. It functional replica is based on a PIC microcontroller.
Materials
Gerber file
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PCB
Component list
Resistors:
R1-R4,R12 = 220?
R5-R10 = 1k?
R11 = 390?
R13,R14,R15 = 4k?7
R16 = 10k?
Capacitors:
C1,C2,C5 = 100nF
C3 = 470?F 25V radial
C4 = 47?F 16V radial
C6 = 10?F 16V radial
C7,C8 = 15pF
Semiconductors:
B1 = B80C1500 (80V piv, 1.5A)
D1-D20 = LED, low current, colour to personal taste
D21 = LED
D22,D23 = 1N4148
D24 = zener diode 4.7V, 0.5W
IC1 = LM7805
IC2 = PIC16C54-04/P (programmed, order code 020390-41)
T1-T6 = BC550C
Miscellaneous:
K1 = 2-way PCB terminal block, lead pitch 5mm
S1,S2 = pushbutton, 1 make contact
X1 = 4MHz quartz crystal
Project software on disk: order code 020390-11 or Free Download
PCB, order code 020390-1 from The PCBShop
R1-R4,R12 = 220?
R5-R10 = 1k?
R11 = 390?
R13,R14,R15 = 4k?7
R16 = 10k?
Capacitors:
C1,C2,C5 = 100nF
C3 = 470?F 25V radial
C4 = 47?F 16V radial
C6 = 10?F 16V radial
C7,C8 = 15pF
Semiconductors:
B1 = B80C1500 (80V piv, 1.5A)
D1-D20 = LED, low current, colour to personal taste
D21 = LED
D22,D23 = 1N4148
D24 = zener diode 4.7V, 0.5W
IC1 = LM7805
IC2 = PIC16C54-04/P (programmed, order code 020390-41)
T1-T6 = BC550C
Miscellaneous:
K1 = 2-way PCB terminal block, lead pitch 5mm
S1,S2 = pushbutton, 1 make contact
X1 = 4MHz quartz crystal
Project software on disk: order code 020390-11 or Free Download
PCB, order code 020390-1 from The PCBShop
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