<div dir="auto"><div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, 11 Jun 2024, 19:04 , <<a href="mailto:mskala@northcoastsynthesis.com" target="_blank" rel="noreferrer">mskala@northcoastsynthesis.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Tue, 11 Jun 2024, Didrik Madheden via Synth-diy wrote:<br>
<br>
> Which exact method they use is hard to know, but it could be anything from<br>
> some simple multivibrator to a digital circuit which in turn might have a<br>
> simple RC oscillator on board that feeds a divider. The latter might be more<br>
> likely since the divider circuit can work with an arbitrarily high input<br>
<br>
ZeptoBars has published die photos of a number of different LED flasher<br>
chips. This one uses an LFSR to create pseudorandom flickering:<br>
<a href="https://zeptobars.com/en/read/candle-flicker-LED-LFSR-RC-oscillator" rel="noreferrer noreferrer noreferrer" target="_blank">https://zeptobars.com/en/read/candle-flicker-LED-LFSR-RC-oscillator</a></blockquote></div></div><div dir="auto">Oh, that gave me an idea. I only considered flashing at a set frequency. What might pseudorandom one be used in? Those little battery powered tea light replacements of course. So, again in the interest of being a fun kid's project, I'd suggest to the original question that you go and buy and harvest such a light for an LED. It might work, it might not, but it'll be a little adventure for you and your son.</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
> Here a second tangent. You can make an observation that you need a quite<br>
> high number of components if you're going for absolute minimalism. Even the<br>
<br>
It's a crazy world we live in...<br></blockquote></div></div><div dir="auto">Btw, I stumbled over my words. What I meant to say was that analog circuits, despite being "simpler" than a microcontroller on paper often uses more components and are less flexible than a minimal MCU solution. Which of course can matter for a size constrained project.</div><div dir="auto"><br></div><div dir="auto">/Didrik</div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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