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A project log for Single Comparator Toggle-Flip-Flop

Imagining a pen-clicker, had to test my analogish-skills...

esot.ericesot.eric 5 days ago7 Comments

Here it is, in all its glory!

First, the audio is converted to PWM.

Then both PWM edges are converted to falling-edge pulses.

This, then, could be fed directly into a floppy drive's "write data" input, storing the PWM on-disk.

When read-back from the disk, the floppy drive will give these same falling-edge pulses to indicate each edge of the recorded PWM.

That, then, gets fed into my single-comparator T-Flip-Flop, to convert those falling-edges back into PWM, then directly drives a speaker.

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Ahh, right... So, this video was recorded months ago... long before I ran the 500KHz simulations. I can't recall the frequency this is running at, but it's surely slower than 500KHz, otherwise, as my conclusions, after running the sims... concluded... This system probably won't run at 500KHz, with the LM311's I used.

I do have faster (2ns!) comparators in the ol' storage-unit... but haven't really decided to go that route, much easier to use a 7474... and, realistically, I only need 500KHz for the *image* portion of #Floppy-bird, which wouldn't benefit from a T-FF at all, being that it'd still have to go into the uC for processing...

However, (wee, look at this link go!) it would be an interesting thing to try, some day, maybe... 500KHz...

Discussions

Dr. Cockroach wrote 5 days ago point

I knew you would figure it out :-) Oh BTW this is the first I have heard your voice :-)

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esot.eric wrote 5 days ago point

Heh, well, actually, this video was recorded months ago... I've only just downloaded all the stuff off my camera and found that gem I'd completely forgotten. There were others, a little better, maybe, but in serious need of editting. This take, well, I sound a bit sarcastic. Ah well.

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Dr. Cockroach wrote 5 days ago point

Oh, I don't know. You sounded fine to me and the vid did give me a different angle of how you are set up in your secret lab ;-)

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esot.eric wrote 4 days ago point

Heh, well, the secret lab has been reverted mostly to 'home'... The lab part took a major hit with the broken-glass-everywhere incident, requiring removal of all non-essentials... still finding glass 'in home' from time-to-time. And the lab-stuff... well, I haven't been able to clear the glass outta all that... That'd be a big ordeal, hard to vaccuum around resistors and such, and the 'workbench' was set atop some drawers which really just aren't conducive to being cleaned in this way. Little nooks and crannies that are perfect for storing a large stockpile of glass-shards to be released a few at a time at every pot-hole. :/

But I've cleaned and restocked some essentials for the latest projects, and now I'm leaning *way* over using a tote-bin shorter than my knees as a work-surface/desk/table. Weee! Though I did finally invest in dry-erase markers... Three for One Dolla!

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Dr. Cockroach wrote 4 days ago point

My hats off to what you are able to do. If I ever hit the big lotto then it's R/V, home..you name it for you :-)

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Dennis wrote 5 days ago point

Very cool! Great work!

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esot.eric wrote 3 days ago point

thankya, sir!

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