Light Dice

This project can be found at https://hackaday.io/project/183942-light-dice

The logic circuit drawing.

Light Dice, Where Light Logic learns how to roll....

Enhanced led display. Yes, the board is printed like that :-D

Putting a ring oscillator, some D latches, a few Nand gates and a dice display together and using only Vactrols. A video and a circuit will be forth coming.

Discussions

Tim wrote 02/14/2022 at 18:49

I think you should be able to shorten your ring oscillator to three inverters :)

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Dr. Cockroach wrote 02/14/2022 at 19:51

I need to tweak on the circuit more. As it is, its output is sequential so three inverters would only give me 3 outcomes that I can see.... Or am I having a senior moment? ;-)

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Tim wrote 02/14/2022 at 20:27

I had an Eureka moment when I wrote the part on the bipolar dice ;) .

(The "fully inverted johnson counter" is actually equivalent to a ring oscillator)

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Dr. Cockroach wrote 02/15/2022 at 12:08

The idea of full inverting was rolling around in my dreams last night.... Going to have to check out that direction :-)

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Dr. Cockroach wrote 02/15/2022 at 15:56

Ahh haa, I did get a three latch Johnson Counter to give me six output states on Logisim. Now to see if I can get it to work with actual LL. Getting a clean enough clock has been the issue till now so wondering if I can make use of a relay oscillator as the clock.... If that works then the LL gate count will drop by a lot.

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Tim wrote 02/15/2022 at 17:17

A three stage ring oscillator will give you a six state output.

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Dr. Cockroach wrote 02/15/2022 at 18:11

Yup, I see the six states, now to get LL to work using a cleaner clock signal. Going to try a relay oscillator for that.

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Tim wrote 02/11/2022 at 16:50

Impeccable schematics again :)

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Dr. Cockroach wrote 02/11/2022 at 17:28

Thanks but I really do need to find a easy and basic cad type program. I actually hate hand drawing but learned it back in aviation school ;-)

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Tim wrote 02/11/2022 at 17:30

I like to (ab)use LTSpice for that. EEschema is also not bad, especially with the new update.

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Ken Yap wrote 02/11/2022 at 11:12

Is there a reason you mirrored the photo?

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Dr. Cockroach wrote 02/11/2022 at 11:47

Might not believe me but that is actually how the board was printed :-)

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Ken Yap wrote 02/11/2022 at 11:49

I hope you got a discount for that. 😉

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Tim wrote 02/11/2022 at 04:55

Really looking forward to the circuit. Your ring oscillator trick is really neat, I am still trying to figure it whether it is possible to freeze the state of a ring oscillator somehow without having to add additional latches.

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Dr. Cockroach wrote 02/11/2022 at 11:01

IDK, With my ring oscillator circuit there are fairly large caps in series with all seven Not gates with their charge states constantly in motion so that would be a tough nut to crack on my end. I am almost finished drawing the circuit.

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#001 - A classic 74XX TTL implementation

#003 - Dice10: ATtiny10 and only two GPIO!

Discussions

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