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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 1 of 478.
The threads with the newest articles are listed first.
serial port powered relay. [12 articles]
Jasen Betts - 2010-09-03 13:51:00
Serial port powered relay.
DTR ----------------o----.
| |
| / 10K
100nF === \
| / RL 50...
The proper way to carge a rechargeable battery? [14 articles]
Rui Maciel - 2010-09-03 09:40:00
After searching for information on how to recharge batteries I was left with contradicting
suggestions regarding the proper way to do it and even what to expect from a recharged battery.
So, in o...Flash frequency possible for LED [9 articles]
Charlie+ - 2010-09-02 23:27:00
I have a variable strobe which uses two bright leds in series driven by an
oscillator and a BC547. This is quite effective and will strobe at just
over 60 Hz. Could anyone give me an idea of the m...suggestions for higher power white LEDs to testing? [49 articles]
Jon Kirwan - 2010-09-01 15:57:00
I've stayed completely away from driving the higher powered
white LEDs, so far. But I'm interested in playing with some
various boost driver designs of mine made from spare parts I
make out of dea...Where to buy a small wheel hub motor? [8 articles]
John Doe - 2010-08-31 11:03:00
Specifically, where can I buy a high quality small wheel hub motor
(with wheel) like the one used for powered Trikkes?
http://www.trikke.com/hd_2/Refurbished-Trikkes/Tribred-E-Kit-Upgrade
http...squaring up a sinusoidal signal [20 articles]
Michael Robinson - 2010-08-31 10:45:00
Let's say I have a sinusoidal signal that I put through an RC low pass
filter with the primary goal of shifting the phase.
sine in ---R---+---- out
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...Pinging Jon Kirwan [2 articles]
default - 2010-08-30 12:54:00
Electronics Design has some articles on LED lighting and design this
month
http://enews.penton.com/enews/electronicdesign/edupdate/2010_08_26_ed_update_082610/display
--
...1) Costas Phase Lock Loop + 2) MSK first nulls bandwidth [2 articles]
Dima - 2010-08-27 15:42:00
Hello,
Hopefully this is appropriate place to ask.
1) I'm studying Costas Phase Lock Loop (e.g.
http://zone.ni.com/cms/images/devzone/tut/a/620a9f541484.gif)
And I'm trying to analyse it, an...Kill-a-Watt meter for 110-220 Volts [23 articles]
Joe - 2010-08-27 09:22:00
I'm in California, USA. During the summer, the wall mounted air
conditioner probably consumes around 80 to 90 percent of the electric
power used in my apartment.
This AC unit has a 220 power plu...Why we have Gravity [48 articles]
fitz - 2010-08-27 03:52:00
Why we have Gravity
A correct theory of gravity will show us these four (4) things:
1. It will show us why gravity also acts like acceleration (principle
of equvalence).
2. It will show us the a...