Today's Message Index:
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1. 07:26 AM - Re: Speaking of physics . . . (Eric M. Jones)
2. 07:49 AM - Re: Speaking of physics . . . (Robert Borger)
3. 09:25 AM - Re: Re: Speaking of physics . . . (Robert L. Nuckolls, III)
4. 09:38 AM - Re: Speaking of physics . . . (Jeff Luckey)
5. 11:47 AM - 5 Meter LED String Info (Robert Borger)
6. 12:12 PM - Re: 5 Meter LED String Info (chris Sinfield)
7. 12:28 PM - Re: Re: 5 Meter LED String Info (Robert Borger)
8. 02:30 PM - Re: 5 Meter LED String Info (Werner Schneider)
9. 02:33 PM - Re: 5 Meter LED String Info (Robert L. Nuckolls, III)
10. 04:47 PM - Re: 5 Meter LED String Info (Sauli Aalto)
11. 06:25 PM - Re: 5 Meter LED String Info (donjohnston)
12. 11:50 PM - Re: 5 Meter LED String Info (depiazza)
Message 1
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| Subject: | Re: Speaking of physics . . . |
For anyone who thought HS or college physics was incomprehensible, and apropos of this group, look at this page: http://amasci.com/wing/airgif2.html
For those who want to experience physics without math, Buy a few copies of "Conceptual
Physics" by Paul Hewitt. It is great to start students off on the right
track. Not too late for Xmas.
There's lots of great stuff on the Internet.
I write on subjects related to physics on "Perihelion Science Fiction". Perihelion
Design is the name of my website. Yes, I named them both...but it's a long
story. I should be driving rivets....
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=415608#415608
Message 2
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| Subject: | Re: Speaking of physics . . . |
Fred,
Glad you put a do not archive on that one ;^)
Bob
On Dec 15, 2013, at 12:02 AM, Fred Klein <fklein@orcasonline.com> wrote:
OK...so a robot walks into a bar, hops on a stool, and turns to the guy next to
him..."So whazz' happenen man?..."
And the guys goes into a long rant about his troubles w/ his self-centered sweetie...
The robot responds, "Man...I know just how you feel...I tried to have a relationship
with a MacBook...just couldn't make it work...all I ever got was 'iThis',
'iThat', 'iThis', 'iThat'..."
do not archive
Message 3
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| Subject: | Re: Speaking of physics . . . |
At 09:25 AM 12/15/2013, you wrote:
>
>For those who want to experience physics without math, Buy a few
>copies of "Conceptual Physics" by Paul Hewitt. It is great to start
>students off on the right track. Not too late for Xmas.
Agreed. I've given away a number of these
books. Highly recommended ESPECIALLY
for grandparents looking for interesting
things to do with grandchildren not
completely distracted/disoriented by
the chaotic input of 'data' in their
daily lives.
Bob . . .
Message 4
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| Subject: | Re: Speaking of physics . . . |
=0Awhile the grown-ups are talking, can the eight-year-olds go play in the
=========================0A
=====================
Message 5
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| Subject: | 5 Meter LED String Info |
Friends,
Last month I ordered a 5 meter string of white LEDs ($9.25), a power
pack/dimmer unit ($2.97) and a pack of 4 extra connectors ($6.50) on
Amazon. Needless to say, they shipped from China and they took about 2
1/2 weeks to arrive here. The LED string is supposed to be weatherproof
and it has an adhesive backing with peel-off cover/protector. One end
is provided with red/black pigtails for connection to the power
pack/dimmer:
The string may be cut to length every three LEDs. You can see the
scissor symbols where cutting is permitted. Also available are
connectors to attach to the end of the cut-off section of string to
allow them to be used. I have a pack of those connectors on order but
they have not arrived yet.
The connection to the power pack/dimmer is simple and I connected the
power pack to my power supply for testing. The power pack/dimmer is for
use with 12v-28v DC. I set my power supply to 12v to check it out.
With the power pack/dimmer set to minimum power there was a surprising
output of light with a current draw of 0.1A.
With the dimmer turned to max brightness the light output was impressive
and only 1.5A of current draw.
My initial plans for the string were to backlight the fuel sight gage
which I believe will work quite well. But that will only take about 1 -
1.5 meters of string. I=92m thinking about running the remainder inside
the center tunnel of the Europa for lighting when I=92m working inside
there. I think my biggest problem will be mounting that funky, big
power pack/dimmer in an unobtrusive location.
These LED strings are available in single color red, green or blue sets
as well as white. They are also available in multi-color LED=92s with
programmable power supply to do visually interesting things with the
string. I haven=92t gotten up the courage to tackle the multi-color
string yet. And the prices are very affordable for the tinkerer.
The mind boggles at the potential interior and exterior uses of these
lights!
Blue skies & tailwinds,
Bob Borger
Europa XS Tri, Rotax 914, Airmaster C/S Prop.
Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP
3705 Lynchburg Dr.
Corinth, TX 76208-5331
Cel: 817-992-1117
rlborger@mac.com
Message 6
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| Subject: | Re: 5 Meter LED String Info |
I am tinkering with the same idea but will use the smaller dimmer from aircraft
spruce.. Saved money on the lights and will use it to spend on the dimmer.
Cris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=415615#415615
Message 7
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| Subject: | Re: 5 Meter LED String Info |
Chris,
Which dimmer from ACS? Can you give a link or P/N?
Thanks,
Bob
On Dec 15, 2013, at 2:12 PM, chris Sinfield <chris_sinfield@yahoo.com.au> wrote:
I am tinkering with the same idea but will use the smaller dimmer from aircraft
spruce.. Saved money on the lights and will use it to spend on the dimmer.
Cris
Message 8
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| Subject: | Re: 5 Meter LED String Info |
Bob,
that is what is lighting up my new house, impressive the white strip
gives around 1900 lm/m the load being 18W/m
The RGBW is used as well however stays mostly white
The pool is on the plan for next year with RGB fully enclosed in that
silicon tube you show. There are ample differences in the kind you can
buy (quality etc.)
Cheers Werner
do not archive
> The mind boggles at the potential interior and exterior uses of these
> lights!
Message 9
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| Subject: | Re: 5 Meter LED String Info |
At 01:46 PM 12/15/2013, you wrote:
>Friends,
>
>Last month I ordered a 5 meter string of white LEDs ($9.25), a power
>pack/dimmer unit ($2.97) and a pack of 4 extra connectors ($6.50) on
>Amazon. Needless to say, they shipped from China and they took
>about 2 1/2 weeks to arrive here. The LED string is supposed to be
>weatherproof and it has an adhesive backing with peel-off
>cover/protector. One end is provided with red/black pigtails for
>connection to the power pack/dimmer:
This is the same class of lighting strip I mentioned
about a year ago. I'm using these for under the cabinet,
over the counter lighting in the kitchen. I'll be using
them for general room illumination in the upgraded
kitchen and a bathroom project.
Eric has a dimmer suited to these lights in airplanes.
http://tinyurl.com/mmuvz7z
His design allows customizing min-max voltage
to accommodate the unique dimming nature of
series-string leds. Your max dim is about 7
volts while max bright is full bore.
I'm planning on putting segments of these strips
in polycarbonate tubing for gee-whiz and general
work light on Dr. Dee and Son Zach's cotton candy
and shaved ice concessions.
These are exceedingly versatile products. The
only shortcoming I've identified so far is the
grade of peel-n-stick adhesive supplied. DOES
NOT stay put with temperature effects outdoors
and in vehicles. Get some 3M mounting tape of
appropriate width and use it to attach these
strips down in a high temperature environment.
Bob . . .
Message 10
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| Subject: | Re: 5 Meter LED String Info |
Robert Borger skrev 2013-12-15 20:46:
> le the multi-color string yet. And the prices are very affordable for
> the tinkerer.
>
> The mind boggles at the potential interior and exterior uses of these
> lights!
These are very nice things to play with indeed.
The weak point is the cheapy dimmer that is very noisy (electrically) if
you are going to use it in the aircraft.
There are better ways to control these strings.
I am going to make some "ultralight" versions with non-weatherproof and
spray with a plastic film used on circuit boards.
You should try playing with the multicolor and start with a cheap
controller it's no more than three slings together.
My wife loves it! 5 meters in the bathroom and shower with a cheap and
simple controller "making waves" with colors.
You get all from slow ambient-hypno-color-fading to total
alien-disco-flashing!
Cheers from
Sauli
Message 11
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| Subject: | Re: 5 Meter LED String Info |
This looks similar to the products that I've been getting from superbrightleds.com
(They're located in St. Louis and I typically get the products within two
or three days. )
I'm using a strip in my glareshield with one of Eric's dimmers.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=415633#415633
Message 12
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| Subject: | Re: 5 Meter LED String Info |
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