[time-nuts] Non electrical time-nuttery

[J. Forster]

I don't think MagAmps were much used for logic, but Di-an made a family of
core logic that would certainly work for the counters in a clock.

-John

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> No one has remembered the magnetic amplifiers (C1960) that were
> considered reliable enough for control avionics.
> Vacuum tubes and semiconductors were not considered reliable.
>
> Back to the IC-less clock, I recently constructed a LED clock for a
> TBolt.
> To avoid the flicker effects and to get control of the LED intensity
> I used BCD counters and
> transistor drivers without multiplexing. BCD to hexadecimal was
> arranged with diode decoding.
> It looks half as big as the IC-less clock board with row after row of
> transistors and resistors.
> At least it will always show the correct time in a photograph.
>
>
> cheers, Neville Michie
>
>