[time-nuts] Digital Clock kit - no Integrated circuits!

[J. Forster]

HP made one with a sync motor running a Veeder Root counter. Something
like a 115A. Runs off 100 KHz from their crystal oscillator.  Neet unit.
It does "sing" a bit.

-John

================


> In message <15F711F4-5F3D-4CB3-8745-34806A416CC9 at cq.nu>, Bob Camp writes:
>>Hi
>>
>>Maybe a system using a rotary electrical machine synchronous to the power
>> line driving a system of gears. and pointers on a dial
>
> That is what was known as a "synchronous clock".  Tom has one running
> off his atoms on his web-page...
>
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by
> incompetence.
>
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