namke
wonkystuff
electronics and sound, what's not to like?!
Posts: 686
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Post by namke on Nov 10, 2023 18:02:48 GMT
The module count increases! (Over 20 wonkystuff modules if I counted correctly)   shop will be updated once I’m back in the UK 🙂 |
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Post by pt3r on Nov 10, 2023 19:05:54 GMT
Ooh a micro resistor ladder. And the other one is clearly 2 nibbles whose outputs get set by their respective c and r inputs. What do i win?
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namke
wonkystuff
electronics and sound, what's not to like?!
Posts: 686
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Teaser
Nov 16, 2023 13:22:32 GMT
via mobile
pol likes this
Post by namke on Nov 16, 2023 13:22:32 GMT
Ugh, sorry — website *will* get updated soon; life, eh?!
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namke
wonkystuff
electronics and sound, what's not to like?!
Posts: 686
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Post by namke on Nov 19, 2023 22:03:27 GMT
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Post by leethargo on Nov 20, 2023 11:35:54 GMT
Nice, I've been trying (but failing) to make my own counter based on LOGIC and S&H, so I definitely want one.
I just have two questions:
1) You mention that this is a prototype and future versions will be improved. Can you hint at the issues that you currently observe?
2) Will the counter work at/near audio rates as well, so that it could be used as a kind of suboscillator, similar to the MM-DIV?
I assume these new modules will become available via Lectronz as well? (I'd also be interested in a t-shirt).
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Post by pt3r on Nov 20, 2023 11:58:59 GMT
my guess is you only have to provide a trigger at audio rate (sqr) to get bits generated at audio rate (or a division thereof depending on the chosen bit).
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namke
wonkystuff
electronics and sound, what's not to like?!
Posts: 686
|
Post by namke on Nov 20, 2023 13:14:04 GMT
Nice, I've been trying (but failing) to make my own counter based on LOGIC and S&H, so I definitely want one. I just have two questions: 1) You mention that this is a prototype and future versions will be improved. Can you hint at the issues that you currently observe? 2) Will the counter work at/near audio rates as well, so that it could be used as a kind of suboscillator, similar to the MM-DIV? I assume these new modules will become available via Lectronz as well? (I'd also be interested in a t-shirt). Hi, thanks for the questions! 1) Yeah, that was a bit vague! I'll improve the description, but basically I need to add 'pull down' resistors to the inputs so that if no cable is connected the inputs drop to ground. This is only really a problem when the inputs are not connected and momentarily connect a 'high' logic signal to the input and then disconnect... what happens in that case is that the input stays at the high level (this is most obvious on the reset (r) inputs as the counter will refuse to count until the 'r' input is connected to ground again (but it is OK to not be connected in that case!) 2) I just checked the data sheet (the counter is simply a 74HC393 IC -- it is rated into the MHz range, so it should easily handle audio rates  3) Yes, I'll add them to Lectronz shortly... |
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namke
wonkystuff
electronics and sound, what's not to like?!
Posts: 686
|
Teaser
Nov 20, 2023 13:16:03 GMT
Post by namke on Nov 20, 2023 13:16:03 GMT
my guess is you only have to provide a trigger at audio rate (sqr) to get bits generated at audio rate (or a division thereof depending on the chosen bit). Exactly. Each output is a octave down from the previous stage. (So, a 440Hz Square wave input would create 220, 110, 55 and 27.5 Hz output square waves.) |
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Teaser
Nov 20, 2023 13:58:56 GMT
pol likes this
Post by feijai on Nov 20, 2023 13:58:56 GMT
Surely a pull-down resistor could be hacked in with a green wire solution?
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namke
wonkystuff
electronics and sound, what's not to like?!
Posts: 686
|
Teaser
Nov 20, 2023 14:20:09 GMT
pol likes this
Post by namke on Nov 20, 2023 14:20:09 GMT
Surely a pull-down resistor could be hacked in with a green wire solution? Yes, this is how I know the pull down will fix it. However, apart from this edge case, the module functions 'as is'. It's also a big PITA to actually do the fix (scrape away solder resist and solder the SMD parts onto the board). |
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Teaser
Nov 20, 2023 14:31:54 GMT
Post by feijai on Nov 20, 2023 14:31:54 GMT
Oh, I'd just hack a through-hole resistor in there... :-)
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