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