New Precise Nixie Clock
A GPS synchronized clock with seconds display
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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Extra info / Update
Full time display including seconds
Internal reference clock bridges GPS signal dropouts
Automatic switching between summer and winter time
Components
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.
Component list
Resistors
Default: 5%, 250 mW
R1,R2,R4,R5,R6,R7,R9,R10,R11,R14,R15,R18,R19,R20,R21,R22,R25,R26 = 10kOhm
R3,R13,R24 = 470kOhm
R8,R23 = 3.3kOhm
R12 = 1kOhm
R16 = 150Ohm
R17 = 5.6kOhm
P1 = 500kOhm preset
Capacitors
C1 = 2.2µF, 50V, 2mm lead pitch
C2,C4,C5,C6,C7,C13–C17 = 100nF, 50V, 20%
C3 = 470pF, 50V, Y5P, 2.5mm lead pitch
C8,C9 = 22pF, 50V, C0G/NP0, 2.5mm lead pitch
C10 = 10µF, 250V, 20%, radial, 5mm lead pitch
C11,C12 = 100µF, 50V, 3.5mm lead pitch
Inductors
L1 = 330µH, 900mA, radial, 10x15mm
Semiconductors
D1 = BYV26
D2 = 1N4007
LED1 = LED, flat head, red, 3mm
T1,T2,T3,T4,T8 = MPSA42
T5 = IRF820
T6,T7 = 2N7000
IC1,IC2,IC3,IC8,IC9 = K155ID1 (74141)
IC4 = PIC18F4420, programmed, Elektor Store # 150189-41
IC5 = LP2950
IC6 = 7805
IC7 = MC34063
Miscellaneous
JP1 = 2-pin pinheader
K1 = 6-pin pinheader, 0.1’’ pitch
K2 = 2-way PCB screw terminal block 0.2’’ pitch
K3,K5,K7,K9,K11,K13 = 10-way (2x5) pinheader receptacle, vertical
K4,K6,K8,K10,K12,K14 = 10-way (2x5) pinheader, right angled
LA1,LA2 = neon lamp, wired, T1.1/4
MOD1 = A2035H GPS module with internal antenna
S1 = SPDT rocker switch, 20V, 0.4VA
V1–V6 = IN-12 Nixie-tube
X1 = 22.1184MHz quartz crystal
Jumpers for JP1
PCB no. 150189-1 V1.1 (Elektor Store)
DC-connector for in-case mounting: PC-010 (www.tme.eu/en/details/pc-010/dc-power-connectors)
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