Relay clock with flip-flop segment display

Relay clock with 7-segment HH:MM flip-flop display

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Another relay htonic device - relay-based "Secondary" clock


Everybody should make his own clock. 


flip-flop 7- segment are used to show time. 

Relay-based T-triggers would be used to count time. RES-9 is good enough to do this.

"One primary clock - many Secondary clock" system

Secondary HH:MM clock have STOBE input and each minute receive impulse from a "Primary" clock(in the middle of the picture). This system was widely used to cover huge region with precise time - all secondary clocks (on the left and on the right on the picture) ever shows the same time because all of them connected to one primary clock source.

Incidator schematic

Each digit have 7 magnets. For opening segment we need to connect magnet to DC for a short time. If we want to switch segment - We need to change polarity and send impuls again.

My first idea is to use Diode selector and relays for selecting segments. Two relays should change polarity for appropriate segments

Next step  - to decode 8421 signal from T-triggers into 7-segment data.#Numitron Hexadecimal display module  by @Yann Guidon / YGDES  fits perfectly for this.

I want to use #Relay Logic Clock by @Dave Gönner  schema as a reference for this clock.

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Yann Guidon / YGDES wrote 04/19/2019 at 08:47 point

"Everybody need to make his own clock."

You got it wrong. Here is the correct version:

"Everybody should make his own clock."


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Artem Kashkanov wrote 04/19/2019 at 09:03 point

Yep!) It's more precise definition :)

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Yann Guidon / YGDES wrote 11/12/2018 at 07:39 point

For the decoder : do you think you could reuse #Numitron Hexadecimal display module  ? :-D

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Artem Kashkanov wrote 11/12/2018 at 07:44 point

It's depending on what I will use in counter block - if I'l use relay counters - I'l reuse your schematic, if there would be stepper switch, which generated binary signal from 0 to 9 I'l have to use my own decoder.

But I already have more that 100pcs or RES9 relays, so I'm thinking about relay counters first.

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Yann Guidon / YGDES wrote 11/12/2018 at 07:47 point

I'm curious about "stepper switch" !

Creating a binary counter with relays is too easy for me now, I want to learn something new :-P

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Artem Kashkanov wrote 11/12/2018 at 11:27 point

Counter on stepper switch much more easier than on relays, because stepper switch is already a counter :)

But I have 25- positions stepper switches, and for clock I need 10-positions switch.

Look at this clock on stepper switch:

This is a prototype for my clock, but I want to create a little bit more accurate device :D

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