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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 15 of 463.
The threads with the newest articles are listed first.
Question for the gurus [9 articles]
Dave - 2009-11-18 20:43:00
I have a friend in a wheelchair who has a home automation system that does
things like opening doors on voice command and such, to make his life easier
(he's parallyzed from the neck down.) Unfor...
override timer in bathroom fan [4 articles]
Nigo - 2009-11-18 17:06:00
Hi there
I have a bathroom fan which turns on whenever the lights turned on.
After the lights is off again it continues for 2-32 minutes (can be
adjusted on a small potmeter). It also turns on if...Gerber files [6 articles]
pawihte - 2009-11-17 20:10:00
I've been designing and making PCBs for my own use for almost 40
years now. The few times I needed more than a couple of units, I
had the pattern printed by local silk-screen printers. It's only
...Trying to identify a chip... [6 articles]
Dave - 2009-11-17 11:07:00
Suspect it is a MC145155-2 in the 18-pin DIP package. Datasheet for this
chip shows pin 5 as VDD, and I am wondering, isn't VDD usually the same as
GND? (Don't see any pins labled as GND, although..."6000 count" display? [7 articles]
Gloria West - 2009-11-17 10:55:00
Some DMM manufacturers state that the display of a meter is "6000 count"
capacity.
With all those 4 digits, the display could show 9999.
Why is it called "6000 count"?
Thank you.
...120 volts ok in 100 volt extension cord? [9 articles]
2009-11-16 21:06:00
I bought a 100 volt/120 volt step up/down transformer for some
equipment I have in Japan. There is only one outlet on the
transformer. The extension cords here say '100 volts' on them. It is
okay t...Signal Integrity Quiz [14 articles]
Additya - 2009-11-16 15:42:00
Here are some set of signal integrity quiz taken from the book
"Signal Integrity for PCB Designers" . See How many you get correct.
http://ezdia.com/Signal_Integrity_Quiz_/Content.do?id=719
...Home made PCB's. [9 articles]
Richard - 2009-11-16 12:50:00
Hi,
I produced a little guide on making PCB's at home, if anyone finds it
any use here it is.
http://www.synios.com/files/hpcbp.pdf
Richard
...$5,000 Retro Fit Hybrid Kit [42 articles]
Bret Cahill - 2009-11-15 19:59:00
Even the prototype is only $100K.
http://www.planetanalog.com/showArticle.jhtml?articleID=218400113&cid=NL_planet
Leave the big engine in there for the road trips.
The unsprung weight doubles...Need a quick inductive ignition tester [15 articles]
Michael - 2009-11-14 09:34:00
To test a non-starting vehicle's distributor, I need an inductive
ignition tester to see if the central high voltage wire is getting
juice.
Can I whip one up with a simple coil of electromagnet w...