Assembling the Display PCB
Mount resistors R1, R2, R4, R5, R25 and R26,
27k (red – violet – orange – gold)
Mount resistors R3 and R24, 470k (yellow –
violet – yellow – gold)
Mount the angled pin headers K4, K6, K8, K10,
K12 and K14.
If you wish, you can now remove any excess
solder flux from the solder joints as these will
remain visible when the clock is finished. You
can use a commercial flux remover or isopropyl
alcohol (IPA) for this purpose. Make sure this
stuff never comes into contact with the acrylic
parts of the optional enclosure.
Have the IN-12 nixie tubes (V1 ... V6) and
optional tube socket pins ready for the next
step. Before starting the assembly you can put
the IN-12 nixie tubes temporarily on the PCB
(solder side) to see in which order they look
best. IN-12 nixie tubes have quite some
mechanical tolerances. You can mount the IN-12
nixie tubes with or without tube socket pins.
