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To: Frank A. Coluccio who wrote (46022)8/28/2017 4:15:14 PM
From: Mchristian
   of 46079
 
Hello Frank A. Coluccio, Thanks for the warm welcome and sharing a nice community.

Yeah, I hope too, someone will answer me and at the same time, I'm also discussing there which is you share here for me.

Thanks again.

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From: Frank A. Coluccio8/28/2017 4:47:32 PM
   of 46079
 
NASA Has a Way to Cut Your Flight Time in Half

The space agency’s supersonic plane design could be quiet enough to lift the long-standing ban on overland travel, if it makes it to production.

By Thomas Black | Bloomberg Business | July 24, 2017

bloomberg.com

------

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To: Frank A. Coluccio who wrote (46020)8/28/2017 9:26:27 PM
From: P2V
   of 46079
 
Your "twitter" reference brings to mind tweeters,sans abusive twits who tweet.
A fine source for tweeters, woofers, and midrange drivers
And the passive R C L crossover networks available for those with a desire to learn, build, and enjoy

Sound systems of your own making
I suggest www.parts-express.com

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To: Mchristian who wrote (46021)8/28/2017 11:23:38 PM
From: P2V
   of 46079
 
HI ,
My first and probably totally ignorant thought is that you may have created a ground loop. between the two assemblies.
ground loops (twin ground connections make fine 60 hz hum pickups .Our surroundings are saturated with 60 HZ sine waves.

going back to audio days .... such problems were eliminated by connecting all device grounds to one common point.(ground) or earth

I once made the mistake of looping a ground from one device to another (in a string of devices)
Believe it or not it happened to be an old IBM Selectric printer (flying ball) to which I affixed a printed circuit board of my own making.

Nothing worked , as stray pulses, as detected with a hand held pulse detecting tool, abounded at all points on my ground wires


A quick look at an Arduino controller + 3 phase servo /motor ... shows that the common point of the 3 coils ,
is completely isolated from the controller's ground..(external earth connection)

Am not a software guy but I date back to machine language routines,
but I would guess that if your software routines worked OK before, they should be working OK now

Hope this is not totally off the wall

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To: Mchristian who wrote (46023)8/29/2017 9:27:13 AM
From: P2V
   of 46079
 
BTW have you looked at: WWW.ELABZ.COM/BRUSHLESS-DC-BLDC-MOTOR-WITH-ARDUINO/ ??

(either directly into your browser of google)

I would look at part two.... circuits and software.

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From: elmatador9/5/2017 6:53:34 AM
1 Recommendation   of 46079
 
We do for retailing what Amazon cannot do


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From: ftth9/5/2017 3:22:20 PM
1 Recommendation   of 46079
 
Voyager 1, Humanity's Farthest Spacecraft, Marks 40 Years in Space

: Article

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From: axial9/6/2017 12:04:34 PM
1 Recommendation   of 46079
 
Sun Unleashes Monster Solar Flare, Strongest in a Decade



'Early this morning (Sept. 6), the sun released two powerful solar flares — the second was the most powerful in more than a decade.

At 5:10 a.m. EDT (0910 GMT), an X-class solar flare — the most powerful sun-storm category — blasted from a large sunspot on the sun's surface. That flare was the strongest since 2015, at X2.2, but it was dwarfed just 3 hours later, at 8:02 a.m. EDT (1202 GMT), by an X9.3 flare, according to the National Oceanic and Atmospheric Administration's Space Weather Prediction Center (SWPC). The last X9 flare occurred in 2006 (coming in at X9.0).

According to SWPC, the flares resulted in radio blackouts: high-frequency radio experienced a "wide area of blackouts, loss of contact for up to an hour over [the] sunlit side of Earth," and low frequency communication, used in navigation, was degraded for an hour. [ The Sun's Wrath: Worst Solar Storms in History]'

Jim

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To: axial who wrote (46030)9/6/2017 5:42:36 PM
From: ftth
1 Recommendation   of 46079
 
Thanks for posting. Here's a time-sequence animation from still pics:
LINK


Probably caused by North Korea ;o)


Difference between solar flares and coronal mass ejections (CME): LINK

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To: axial who wrote (44934)9/7/2017 1:24:00 PM
From: axial
1 Recommendation   of 46079
 
Hurricane Irma boosts downloads of walkie-talkie app Zello

Does Zello Work Without Internet?
— The Zello app can be useful in an emergency situation, it still requires the internet to function.

Jim

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