20250802_120236.mp4

Video showing the completed and working end product

MPEG-4 Video - 25.64 MB - 08/02/2025 at 14:25

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No-Si-Digital-Clock.zip

KiCad schematic files, updated at end of project

x-zip-compressed - 148.68 kB - 08/02/2025 at 14:24

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20250727_164507.mp4

Another milestone: the units seconds section is working. 1Hz is given to the third dekatron, which makes one step per second and takes ten seconds for a full rotation. This dekatron is a GS10C, a type with all 10 outputs available. Each output is connected to a triode to invert the signal and drive one nixie figure. It takes 5 E90CCs to drive one nixie tube. This is a temporary set-up; because I have only 4 nixie tubes, there will be no seconds in the end solution. On the other hand, it might be a useful feature for setting the time.

MPEG-4 Video - 25.39 MB - 07/27/2025 at 14:58

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20250726_161645.mp4

Major milestone: I have the 1 Hz working. Mains frequency is given to the rightmost dekatron, which spins with 50 steps per seond, that gives 5 full rotations per second. The outputs from states 0 and 5 are taken, inverted by an E90CC triode. This gives a 10Hz pulse train, which is given to the second dekatron, which makes 10 steps per second and therefore one full rotation in a second.

MPEG-4 Video - 10.87 MB - 07/26/2025 at 14:37

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No-Si-Clock.FCStd

This is the FreeCad 1.0 file containing the design of the aluminium front plate with drill holes for the tubes and screws

x-zip-compressed - 108.33 kB - 07/26/2025 at 14:35

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