Foto update (nov 2018)

A project log for Relay Logic Clock

A digital 24 hour clock using only relays and diodes for the counting logic.

Dave GönnerDave Gönner 11/19/2018 at 15:585 Comments

The last PCB, fresh off the mill. This is the lower decoder board. It replaces the two separate decoders I made earlier, because I had to add extra circuitry for the carry logic.

Here it is after soldering.

Those diodes are a real challenge to do consistently. Here is a view from the back of the clock. I had to transfer all the PCBs to a new carrier board (the piece of MDF), without disturbing the delicate wiring. I removed the flip-flop boards to make it easier to handle. You can see I just started wiring in the new lower decoder board.

And there it is, in all it's warm glowing glory. Completely functional, although the wiring needs some work. This is a major milestone for me. The first time all the components are in place and everything seems to be working. Now I can start designing the plexiglass frame that it will be mounted in.

That's it for now. Thanks for reading! Cheers.


Phil Zucarelli wrote 12/04/2018 at 23:05 point

Nice looking clock!

Are you planning on making the design files available? Artwork, source code, etc.?

I would be interesting in making one of these.

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Dave Gönner wrote 11/20/2018 at 19:22 point

It sure is fantastic to look at, and to listen to. Nice to hear that you like it. The horrible camera doesn't do it justice in high-res ;-)

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Yann Guidon / YGDES wrote 11/19/2018 at 23:42 point

I had to dig into the HTML to find the large-size picture of the whole clock, it's a crazy sight !

Great job !

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Yann Guidon / YGDES wrote 11/19/2018 at 23:38 point


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