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Sci.Electronics.Basics


Sci.Electronics.Basics is a worldwide Usenet news group that is used to discuss basic electronics questions.

There are 4775 threads in our archives.

You are looking at page 10 of 478.

The threads with the newest articles are listed first.

Amplifier with higher OIP3/IIP3 the more linear it is? [4 articles]

G Patel - 2010-06-14 16:56:00
Does higher OIP3/IIP3 mean more linearity? ...Amplifier with higher OIP3/IIP3 the more linear it is?

Electric scooter motor reversible? [5 articles]

John Doe - 2010-06-14 08:55:00
I have not found it on the web, but the part number is XYDJ09072117 It uses this controller. http://www.curriestore.com/731-ezip-controller.html "Controller, 24v30a BG 5pin, TO/Charge Cut, (08A ve...Electric scooter motor reversible?

Strange behavior driving a relay from a 555 time in monostable mode [9 articles]

Rocky Stevens - 2010-06-11 11:19:00
I've set up a 555 timer to put out a pulse of about 2 seconds, and have confirmed it works with an led. However, when I replace the led with a relay, the 555 outputs positive voltage indefinitely, k...Strange behavior driving a relay from a 555 time in monostable mode

NEC 870 for Lighting on the Web? [2 articles]

W. eWatson - 2010-06-10 18:00:00
Supposedly the NEC 870 book on lighting codes is on the web I've seen references to it, but no pdf? Anyone know? ...NEC 870 for Lighting on the Web?

Sealed lead acid battery maintenance? [19 articles]

John Doe - 2010-06-09 16:43:00
I would like to learn something about proper care of sealed lead acid (SLA) batteries. Is there any good authoritative science on how SLA batteries should be cared for? I am searching... I suppose ...Sealed lead acid battery maintenance?

TDS410 questions [6 articles]

Gary Walters - 2010-06-09 14:17:00
Once an event is captured (trigger has come and gone), I see a waveform fixed on the display. I presume this is the digitized waveform now in memory. I want to view forward and backward in the e...TDS410 questions

Looking for PS glitch with Tek scope? [6 articles]

Gary Walters - 2010-06-09 09:50:00
I have a machine in that I suspect the PS (+24vdc) is sagging under load which is causing all kind of havoc with the digital circuits. The load is brief, so I've not been able to capture it with a...Looking for PS glitch with Tek scope?

Why are my LEDs still glowing...? [12 articles]

Ade - 2010-06-08 12:27:00
Now, there's a question to keep you up at night.... Hi group - electronics noob here, although I've been hanging around t'interweb (and Usenet) for many years, so apologies if this Q is in the ...Why are my LEDs still glowing...?

Difficulty identifying SMD semis via markings [16 articles]

DaveC - 2010-06-08 04:39:00
I've never had to look up a SMD semi before now. Unlike JEDEC codes, these less-than-brief alphanumeric codes have no standard that I can find. And if there's no manufacturer mark (or it has bec...Difficulty identifying SMD semis via markings

basic TV question [13 articles]

default - 2010-06-06 06:10:00
Do all TV's have built in degaussing coils these days? I have a CRT style TV that's been in service for ~ 4 years and it has been gradually losing "color purity" mostly on the bottom edges in a ...basic TV question
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