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ATTiny555

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What, you're using a 555? I could've done that with a microcontroller!

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Titoxi wrote 12/16/2021 at 13:37 point

Interesting, especially if it can exceed the operating characteristics of a 555. For example, what is the maximum frequency at which it could oscillate?

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Shranav Palakurthi wrote 12/17/2021 at 06:01 point

This thing can't oscillate any higher than 10 kHz realistically, assuming you clock the ADC at 500 kHz like it is right now. However, with an ADC clock speed bump to something like 1 MHz, you could double that bandwidth to about 20 kHz, which still isn't good at all.

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Matthias Urlichs wrote 12/27/2021 at 13:00 point

No you cannot exceed the 555's speed. Quite the contrary.

The beauty of this hack is that you can add features. For instance I have this old setup where the 555 is used as a delayed-on-off controller (controllable with a bunch of potentiometers). I now need to also limit the total on-time. To do that I'd need another 555 with its assorted components … or I simply replace it with this hack.

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Shranav Palakurthi wrote 12/28/2021 at 00:30 point

Wow, I'm impressed that you've found a use for this project! I hope the documentation is detailed enough to help you get your idea working :D

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