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Oof. My electronics stopped before GCSEs, and even I know about 555s.

I can believe someone might prefer software for prototyping, but manufacturing? Well, I've seen prototypes enter production, so yes, but still, ugh.




A attiny might not make sense, but you can get something like the PMS150C for around ~5ct, where it makes more sense to use a single MCU than a 555 with all the extra needed BOM Items.


Well, you can always choose this: https://www.hwlibre.com/en/troll-duino/




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