sci.electronics.design Google Group

Re: Accelerometer + Tilt compensation

2008-08-22T05:08:16Z

No, I don't think this works. Your readings are the sum of the acceleration
in one direction and the earth gravitation, which gives a vector, which is
not in the direction of the accleration. But when subtracting the earth
gravitation, you can rotate it. If you rotate it before, I think you'll get
the wrong result.

Re: switching regulator questions

2008-08-22T04:46:08Z

Ah. Thanks. Requires two coils, sets of diodes, ... but more
stable...
Thanks to all who replied
Michael

Re: Polish jokes

2008-08-22T04:41:19Z

On Thu, 21 Aug 2008 18:11:45 -0700, "Paul Hovnanian P.E."
I like that. The real acronym is:
"Phased Array Tracking Radar to Intercept Of Target"
No missile system or product can be considered successful without a
catchy acronym, or clever name. I've heard it called "Pat's Riot" or
"Parts Riot".
The Wikipedia article covers the accuracy issues. Not great accuracy

Re: OT Windmills on skyscrapers.

2008-08-22T04:34:33Z

Already under construction in Bahrain.
[link]

Re: A serious threat to our national security

2008-08-22T04:17:46Z

Bullshit.

Re: A serious threat to our national security

2008-08-22T04:16:15Z

Word games.

Re: Accelerometer + Tilt compensation

2008-08-22T03:54:22Z

I need to read your post 10 times before I comment on it... but I'll
answer this quickly. If I could orient the accelerometer such that it
is perfectly flat (ie: perpendicular to gravity), meaning X and Y read
0 and Z reads 1 at steady-state... AND... if I could orient it such
that movement of the vessel in a perfectly straight line only results

Re: need fast switching transistor

2008-08-22T03:33:13Z

Check out the NTE64. Silicon NPN high-speed switching transistor. UHF.
For some reason I can't get to the datasheet at the moment, but it might be
worth looking at.
Dave

Re: Does this sound a little fishy? (Noise currents, split planes, etc.)

2008-08-22T03:30:06Z

On Aug 22, 12:59 am, "Joel Koltner" <zapwireDASHgro...@yahoo.com>
wrote:
The ideal situation is that the electronics has no connection at all
to any exposed metal and that all shielding and ground be done inside
the product. Sometimes you have to put a capacitor between the
chassis and the electronics ground to meet the EMI restrictions.

Re: A serious threat to our national security

2008-08-22T03:17:23Z

you dont buy software. you license it, and the license agreements
clearly state that it doesnt have to work. therein lies the rub.
Cheers
Terry

Intel claims wireless electric power transmission

2008-08-22T03:08:27Z

[link]
Nothing here that Tesla didn't already try, but it was unfeasible due
to inneficiency then, not sure how they claim to solve that hurdle..
and not cause cancer to boot...

Re: OT: electric landing

2008-08-22T02:53:26Z

So was the plane just left there?
And why wasn't the power turned off (or was it?)

Re: A serious threat to our national security

2008-08-22T02:45:10Z

On Thu, 21 Aug 2008 19:08:20 +0000, Guy Macon
I mean a seller killing off competiton by various illegal means, so
that you as a buyer have little choice. The courts should have broken
Microsoft up into separate OS and applications companies.
Selling Word is, because they deliberately and illegally boogered

Re: Accelerometer + Tilt compensation

2008-08-22T02:37:08Z

You must calibrate it out in some way. You must somehow measure the axis
then use that.
You don't realize that rotating the axis will fix it up properly.
Take 2D for example.
The transformation equations are
r = x*cos(t) - y*sin(t)
s = x*sin(t) + y*cos(t)
suppose they are depenent on time(t is angle of rotation between axis)

Re: Electronics manufacturer puts schematics on website

2008-08-22T02:34:54Z

"Ross Herbert"
** Copyright is not lost because you PUBLISH something !!!
** These days, I can find most of the schematics I need on the net - from
the equipment maker's site or from sites that have collected older and /or
hand drawn schems.
Normally, one phone call or email to an importer gets me a PDF of the needed