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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 4626 threads in our archives.

You are looking at page 11 of 463.

The threads with the newest articles are listed first.

Discharging a lithium-ion battery, what is the third wire for? [25 articles]

John Doe - 2009-12-22 19:58:00
I have some Bosch BAT411 lithium-ion 10.8 V batteries. One of the tools is a flashlight. It includes a small circuit board between the battery and the light bulb. The battery plug has three wires. ...Discharging a lithium-ion battery, what is the third wire for?

diode temperature model [21 articles]

Michael Robinson - 2009-12-22 18:57:00
in eq'ns (10.23), (10.24) and (10.27) in the "temperature model" section of http://qucs.sourceforge.net/tech/node68.html Does what do B and ni mean? ...diode temperature model

PV Freeways

Bret Cahill - 2009-12-22 17:31:00
They might have to get rid of the crank case oil first. http://www.scientificamerican.com/article.cfm?id=driving-on-glass-sol... An interesting idea can sometimes lead to other even better solu...PV Freeways

Check frequency [40 articles]

ClueLess - 2009-12-21 11:11:00
Hi all I have a requirement to exactly adjust the frequency of a microcontroller system (8051) that works with the 32768 Hz watch crystal. I am not an electronics engineer but a hobby type. I...Check frequency

Does an USB stick gain weight when you put files on it? [12 articles]

Bert Harleman - 2009-12-19 10:45:00
Does an USB stick gain weight when you put files on it? or to put it a different way: Are electrons from outside used to store data on an USB stick? Since I'm quite new to electronics I cannot ...Does an USB stick gain weight when you put files on it?

component tester, transistors and diodes / LEDs [4 articles]

Shaun - 2009-12-19 01:32:00
Hello, I'm looking for a transistor tester that tests gain and leakage of transistors, also tests diodes and has enough current to light up an LED. Would prefer if it would identify leads and t...component tester, transistors and diodes / LEDs

Power supply unit and ramping [4 articles]

Rob - 2009-12-18 05:00:00
Hello all! First off, I would like to apologize if I'm in the wrong group. This is my first time doing anything with electronics (and I'm not even sure if it qualifies as electronics). I lear...Power supply unit and ramping

Cooky: Small Robots That'll Make Your Dinner [2 articles]

jenneylist - 2009-12-17 16:14:00
Cooky: Small Robots That'll Make Your Dinner http://www.techespot.com/2009/12/cooky-small-robots-thatll-make-your.html ...Cooky: Small Robots That'll Make Your Dinner

What's the output voltage of full wave rect? [8 articles]

DaveC - 2009-12-17 02:01:00
A full-wave rectified 32vac voltage without filtering or smoothing components. Just a bridge rectifier connected across a transformer 32v secondary (no center taps) without a load connected to the...What's the output voltage of full wave rect?

Use 14.4V NiCad battery through a L7812 regulator? [23 articles]

John Doe - 2009-12-16 23:49:00
I need to power three Cree XLamp XRE LEDs. The standard sealed lead acid battery is 12 V, but it is heavier than I would like to carry. I have some spare rechargeable 14.4 V DeWalt tool batteries....Use 14.4V NiCad battery through a L7812 regulator?
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