Path: csiph.com!eternal-september.org!feeder.eternal-september.org!nntp.eternal-september.org!.POSTED!not-for-mail From: "Don" Newsgroups: sci.electronics.design Subject: Re: CoB LED filament analysis Date: Thu, 23 Apr 2026 17:15:48 -0000 (UTC) Organization: A noiseless patient Spider Lines: 56 Message-ID: <20260423a@crcomp.net> References: <20260411a@crcomp.net> <20260421a@crcomp.net> <2mqhuk9stmli0ql43nkg8tl62r14cj2eq3@4ax.com> <20260422a@crcomp.net> <10schc3$2qlkn$7@dont-email.me> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Date: Thu, 23 Apr 2026 17:15:48 +0000 (UTC) Injection-Info: dont-email.me; posting-host="273f82e167e614b55ee2b9aaec6e9f78"; logging-data="3368409"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19e1Nice4G1ShhD2JIl+znK" Cancel-Lock: sha1:kdwCswM7pR/zzZL/YwTWpVEszSk= Xref: csiph.com sci.electronics.design:743273 john larkin wrote: > Bill Sloman wrote: >> john larkin wrote: >>> JM wrote: >>>> Don wrote: >>>> >>>>> What does a forking fantasy about faffing have to do with your bright >>>>> idea to use a series resistor to create a current curve? 1, 10, 100, >>>>> 10K, 100K, 1M series resistors all show slightly attenuated 320 VAC. >>>>> What do you think about that? >>>> >>>> So you think you see 320V ac across a 1 ohm resistor. >>>> >>>> Think about it. >>> >>> Very bright flash? >> >>There's not a lot of intellectual brilliance on show in this thread. > > There are a lot of people who are interested in electronics - the > curiosity about the COB LED is admirable - but don't have good > quantitative instincts for it. > > I went to a hardware pitch meeting last night. There were three VCs > with money, and five startups making pitches for same. We, the > audience, were there to applaud or something. The beer and pizza were > free. > > What impressed me was that the pitched ideas were so goofy, but more > impressive was that they were all electronic intensive and the people > obviously weren't very good with electronics. > > Two things are crazy fads here now: AI and robotics. The robotics that > I'm seeing are clumsy toys with about nine times more klugy > electronics and wiring than they need. Most would do fine with a DIN > rail PLC. > > Strange times. This thread turned too treacherous. It's time for a brain teaser to get things back on track. Put on your quantitative instincts hat and take a good long look at all of the images shown at: Now put on your thinking cap. There's something glaringly wrong (so to speak) with the experiment. It may explain the phase difference discrepancy. Stay tuned. Danke, -- 73, Don, WD7Q veritas _|_ liberabit | https://www.qsl.net/wd7q vos |