Online Dictionaries Suck

Started by Rick C in sci.electronics.design3 hours ago 17 replies

I was reading about the new coronavirus and the article talked about homologues in the context of the RNA coding for several proteins which have...

I was reading about the new coronavirus and the article talked about homologues in the context of the RNA coding for several proteins which have no known "homologues". I tried looking up the word to understand the precise meaning and found this sort of definition across the board. ho·mo·log /ˈhōməˌlôɡ,ˈhäməˌlôÉ


OT: A Possible Second Disease to be Eradicated from the Earth!

Started by Rick C in sci.electronics.design3 hours ago

I just read about a disease caused by infection by the parasite Dracunculus medinensis, called Guinea worm disease. It infects those drinking...

I just read about a disease caused by infection by the parasite Dracunculus medinensis, called Guinea worm disease. It infects those drinking unfiltered surface water. There is no cure for the disease. As the final stage of the worm's life it emerges from the body through a very painful sore so as to release tens of thousands of larvae. The disease can be prevented by filteri


Ping John Larkin, Phil Hobbs etc. re books

Started by Ivan Vegvary in sci.electronics.design3 hours ago 2 replies

Been lurking on this news group for many years. I thought the two gentlemen mentioned above (and others) could give me advice regarding...

Been lurking on this news group for many years. I thought the two gentlemen mentioned above (and others) could give me advice regarding disposition of technical books. I have probably over a 1000 technical books that I have accumulated over many decades. Just turned 77 and concerned about what to do with my library. I had a Professional Civil Engineering Consulting practice for ove


The x-Chapters: A missing topic!

Started by olaf in sci.electronics.design4 hours ago

I am just reading the first page of the "The x-Chapters" When I read the line: "PWM for dc motors - a myth demolished" a thought pop out of...

I am just reading the first page of the "The x-Chapters" When I read the line: "PWM for dc motors - a myth demolished" a thought pop out of my brain: There is something missing: The peltier element - how to avoid PWM and ripple. Fun with PIR sensors - what you should do and what not. The LM741 - please dont use it anymore. :-) Any other ideas for topics we realy need? Olaf ...


Negative 48 Volts DC

Started by Grant Taylor in sci.electronics.design4 hours ago 23 replies

Is anyone willing to explain Negative 48 Volts DC? I'm trying to learn about it because we're using it for a few things at work (servers and...

Is anyone willing to explain Negative 48 Volts DC? I'm trying to learn about it because we're using it for a few things at work (servers and switch equipment) and I'd like to better understand what we're working with than simply going through the motions that someone else dictates. Read: I want to understand and not simply rely on wrote memory. I've learned that -48 VDC uses what i...


2 component negative feedback oscillator and voltage "multiplier"

Started by Robert Baer in sci.electronics.design5 hours ago 7 replies

Problems are: Spice version does not oscillate, and Spice LED voltage is not 3V. Go buy the Dollar Tree LED Flashlight and Lantern...

Problems are: Spice version does not oscillate, and Spice LED voltage is not 3V. Go buy the Dollar Tree LED Flashlight and Lantern Combination SKU: 286458 and see (do not forget it needs one AA cell). Version 4 SHEET 1 5945676 13421556 WIRE 2080 -592 1648 -592 WIRE 2080 -560 2080 -592 WIRE 2080 -496 2048 -496 WIRE 2176 -496 2080 -496 WIRE 1648 -480 1648 -592 WIRE 2048 -448 2...


OT: Wow, compact fluorescent light bulbs already obsolete

Started by John Doe in sci.electronics.design7 hours ago 169 replies

I bought CFL lightbulbs once. Now I need some more, I turn around and they're gone! Replaced by LED light bulbs. That was a short-lived...

I bought CFL lightbulbs once. Now I need some more, I turn around and they're gone! Replaced by LED light bulbs. That was a short-lived technology.


My own private idaho (self employ)

Started by George Herold in sci.electronics.design9 hours ago 9 replies

So I've been in this kinda dark place... partly due to BS from my PPoE. (need not be discussed) But that looks to finally be behind me! I...

So I've been in this kinda dark place... partly due to BS from my PPoE. (need not be discussed) But that looks to finally be behind me! I went down to visit with Phil H. for a day, (wonderful people!), and when I came back there was all this good news in the mail. One says that I can use my unemployment insurance benefits to apply for the Self-employment Assistance Program. And I'd ...


Tesla vs Edison "current wars" dramatisation

Started by Mike Coon in sci.electronics.design9 hours ago 29 replies

Long-running BBC1 TV sci-fi time-travelling space opera "Doctor Who" episode 4/10 at 19:10 on Sunday 19 January will apparently include actors...

Long-running BBC1 TV sci-fi time-travelling space opera "Doctor Who" episode 4/10 at 19:10 on Sunday 19 January will apparently include actors playing both Nikola Tesla and Thomas Edison. I wonder if they will explain AC/DC without getting into gender considerations... Mike.


OT: Smartphone always charging destroyed battery?

Started by John Doe in sci.electronics.design11 hours ago 39 replies

https://www.flickr.com/photos/27532210@N04/ Another Chinese battery bit the dust here. Noticed my smartphone was bulging, the screen was...

https://www.flickr.com/photos/27532210@N04/ Another Chinese battery bit the dust here. Noticed my smartphone was bulging, the screen was warping. The cause was obvious so, not having a torx t1 screwdriver, I ripped it apart. Tried using a capacitor in place of the stock battery but that didn't work. An 18650 works, but it's charged to 4.36 V. The smartphone is used for Wi-Fi security...


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