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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 4623 threads in our archives.
You are looking at page 16 of 463.
The threads with the newest articles are listed first.
How supply power for changing number of LED? [12 articles]
-dave- - 2009-11-13 23:59:00
A friend wants to use some LEDs in something she is designing. She
may use 5 LEDs or she may use 20 LEDs. It may even turn out she uses
50 LEDs.
Would the resistence of the dropping resistor ne...
AC DC Power supply [5 articles]
Uriah - 2009-11-13 13:39:00
I need to power a Bill Changer acceptor. This is just the part the
accepts the bills. It requires +5VDC, +12VDC, -12VDC AND 6VAC. These
voltages all have the same single ground wire. How do I rec...Did a BT135 SCR exist? [8 articles]
pimpom - 2009-11-13 03:51:00
I live in a remote place where it's often impractical to try to
get the exact part I want, either for replacement or for a new
project, and that was even more so 15-20 years ago when I was
still...SMPS for audio amps [13 articles]
pawihte - 2009-11-12 20:10:00
This is probably a silly question with an obvious answer to those
who know: Why are audio amplifiers seldom powered with
switched-mode power supplies? The common exceptions I know of are
in case...Ultra-powerful headlamp using LEDs? [11 articles]
John Doe - 2009-11-12 00:45:00
I am looking to make or buy an ultra-powerful head/helmet lamp for
nighttime in-line skating. It requires lots of light for safety
reasons and because skate wheels are small and tend to trip on
...Design of Electronic Vehicle Anti-theft Gadget
Dan - 2009-11-11 17:46:00
See http://www.youtube.com/watch?v=FFb5_mKfnR8 for details
...Connect 36 volt battery to an ordinary 120V household lightbulb? [8 articles]
John Doe - 2009-11-10 23:26:00
Should a 36 volt lithium-ion battery be connected to an AC
lightbulb? Will that produce a dimmer light? Will it use less
electricity than a normal 36 volt flashlight bulb? I have some 36
volt co...What is the symbol for a mic? [51 articles]
Eddie - 2009-11-10 20:53:00
I want to write (by hand) if some voice recordings of mine are in
mono or stereo.
Are there some standard symbols used for a mono mic and a stereo
mic?
Are there mono/stereo mic symbols us...PG&E Wants Rate Hike for Efficient Energy Users [6 articles]
Michael - 2009-11-09 22:59:00
It's a little early for April Fools jokes...
http://www.sfgate.com/cgi-bin/blogs/inthemission/detail?entry_id=51129&tsp=1
--
Darrett Computer Repair
Serving the Sacramento area.
Free estimate...Connect microphone to powered computer speakers? [3 articles]
John Doe - 2009-11-09 17:00:00
Is there a low noise (not necessarily audiophile quality) OEM
amplifier that can be used to power an electret microphone for
connecting to powered computer speakers? Are there other solutions
fo...