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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 13 of 478.
The threads with the newest articles are listed first.
Quick Test for Optocoupler needed [5 articles]
bobjbecker - 2010-05-19 14:40:00
I need to test a Sharp PC817 Optocoupler.
Can I apply a 1.5 volt AA cell to pins 1 and 2 (pin 1 the positive side)...
then simply check the change in resistance with a VOM on the output side
(pins ...
How can a Philips AC-DC transform make so much noise? [15 articles]
Merciadri Luca - 2010-05-19 11:59:00
Hi,
I am using a Philips HQ 8000 100-240V /D 50-60 Hz, 9W, shaver charger
and transformer. I always let it plugged in, and then, to charge the
shaver, I plug the shaver in the charger, and everyt...VCC width [21 articles]
aleksa - 2010-05-18 18:52:00
When I started designing PCBs, I was given an advice
to route GND with 50mils and VCC with 25mils.
But now I read on the net that VCC should be wide, also.
I make two-layer digital boards only....How can I know the maximum magnetic field a device can cope with? [16 articles]
Merciadri Luca - 2010-05-18 15:44:00
Hi,
I would like to know, for some devices that I have (e.g. PDA,
calculator, etc.), the maximum magnetic field they can cope with. How
can I know it, without testing (obviously), and if no such ...How do GPS tracking devices work? [16 articles]
Fester Bestertester - 2010-05-16 16:25:00
Specifically, how do they transmit if they are, for example, inside a
shipping container?
Is there a hole drilled for an antenna? Or a fiberglas patch made to replace
some of the steel top or ...Pulse transformers [8 articles]
Sherlock Holmes - 2010-05-14 15:46:00
As i understand, transformers are meant to pass A/C currents, and
block DC currents. How then is a pulse transformer created that passes
digital pulses through.
...Voltage controlled oscillator question [21 articles]
Daku - 2010-05-14 09:01:00
Could someone please clarify the following ?
Consider a LC-tank and a ring oscillator based voltage controlled
oscillator. In a LC-tank, the control voltage influences the
oscillation frequency - h...current conveyor [3 articles]
Michael Robinson - 2010-05-13 22:53:00
I was reading this article
http://electronicdesign.com/article/power/design-a-differential-voltage-controlled-current-s.aspx
and looking at the accompanying diagram
http://archive.electronicd...EPE Mag July 1998 [9 articles]
Periproct - 2010-05-13 19:00:00
Don't suppose anybody here would know how I could get hold of a copy of an
article in Everyday & Practical Electronics, July 1998. The Greenhouse
computer.
I'm guessing this is a lost cause as ...Best Light for reading? [5 articles]
don - 2010-05-13 16:01:00
When choosing a Flourescent Bulb for a Task Light what is the best for
reading.......my choices are 2700 Kelvin, 3000, 3500, or 4100.....
...