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The (long) story of the relay clock
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edavid:

--- Quote from: Spemo on July 27, 2019, 08:35:38 pm ---
--- Quote from: edavid on July 27, 2019, 05:36:51 pm ---
--- Quote from: Spemo on July 26, 2019, 07:27:31 pm ---As promised, here is the "Schematic" I use to build this monster - maybe one of you can find some use with this.

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That is a "pictorial diagram" rather than a schematic.  Is it possible to create a schematic?


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something like this?

(Attachment Link)

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Yes, exactly, although it turned out to be only slightly more comprehensible than the pictorials  :P
Thanks...
Spemo:

--- Quote ---
Yes, exactly, although it turned out to be only slightly more comprehensible than the pictorials  :P
Thanks...

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Well here you go, I drew something up in tinyCad with the right values. I did this quickly, so this is only the 3 digit version with startup circuit.

edavid:
Thanks, much easier to understand!
maxwell3e10:
Now a really crazy idea would be to make a "digital" clock without any semiconductors. Use a mechanical pendulum for timing, relays for counting, and small incandescent lightbulbs. I wonder if such a thing was ever made during the early electric era.

I find it curious that most popular wrist watches use the opposite approach now, a quartz oscillator but mechanical hands. They have never appealed to me.
texaspyro:

--- Quote from: maxwell3e10 on July 28, 2019, 12:51:25 am ---Now a really crazy idea would be to make a "digital" clock without any semiconductors.

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I've seen a digital clock where all the counting, display, etc was done with neon lamps. 
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