Prev: Trigonometry Tutorial
Next: using two LTC3780 in parallel
From: Archimedes' Lever on 3 Apr 2010 15:25
On Sat, 03 Apr 2010 10:49:21 -0700, John Larkin
<jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:

>
>I'm simulating a digital control loop, essentially a constant-voltage
>current-limited power supply using an ARM cpu with adc/dac, until the
>half-day tickets go on sale at Tahoe Donner. $8.
>
>John


It comes down to the tolerances of the discrete components used to test
for the voltage set-point in the feedback loop that the adc gets fed
from, and any components downstream from that, if any prior to the
output, if you were dumb enough to take the test from other than the
output taps.
From: Archimedes' Lever on 3 Apr 2010 15:26
On Sat, 03 Apr 2010 11:08:26 -0700, hamilton <hamilton(a)nothere.com>
wrote:

>On 4/3/2010 9:40 AM, John Larkin wrote:
>>
>> ftp://jjlarkin.lmi.net/Curvies_1.jpg
>>
>> ftp://jjlarkin.lmi.net/Curvies_2.jpg
>>
>>
>> John
>>
>LOL, how did you get them to do that ??
>
>;-)
>

It has to be a function of the prevailing wind current at that location
on the house.
From: Archimedes' Lever on 3 Apr 2010 15:37
On Sat, 03 Apr 2010 14:20:50 -0500, "krw(a)att.bizzzzzzzzzzzz"
<krw(a)att.bizzzzzzzzzzzz> wrote:

>On Sat, 03 Apr 2010 09:40:57 -0700, John Larkin
><jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote:
>
>>
>>ftp://jjlarkin.lmi.net/Curvies_1.jpg
>>
>>ftp://jjlarkin.lmi.net/Curvies_2.jpg
>>
>
>You must get some wind up there.


At that side of the house, and blowing the same way for hours on end.

That is a function of the structure position and shape, and the wind
direction that day. Wind alone is never that continuously laminar, so it
is definitely a function of the house itself creating the needed wind
current with the non-laminar normal surface flow as the feeder. It is a
'natural' wind tunnel.
From: J.A. Legris on 3 Apr 2010 15:44
On Apr 3, 1:49 pm, John Larkin
<jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
> On Sat, 3 Apr 2010 10:06:22 -0700 (PDT), "J.A. Legris"
>
> <jaleg...(a)sympatico.ca> wrote:
> >On Apr 3, 12:40 pm, John Larkin
> ><jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote:
> >>ftp://jjlarkin.lmi.net/Curvies_1.jpg
>
> >>ftp://jjlarkin.lmi.net/Curvies_2.jpg
>
> >> John
>
> >Where do you live to get such nice snow and ice? We're dying up here
> >in Ottawa, Ontario. Dry and warm (25° C).
>
> Did you get the rain that hit the US northeast?
>

We only caught the edge of it. It's been like that most of the winter,
and now a very early "spring".

--
Joe
From: John O'Flaherty on 3 Apr 2010 15:48
On Sat, 03 Apr 2010 11:08:26 -0700, hamilton <hamilton(a)nothere.com>
wrote:

>On 4/3/2010 9:40 AM, John Larkin wrote:
>>
>> ftp://jjlarkin.lmi.net/Curvies_1.jpg
>>
>> ftp://jjlarkin.lmi.net/Curvies_2.jpg
>>
>>
>> John
>>
>LOL, how did you get them to do that ??
>
>;-)
>

It looks as if the edge of the snow curves down as it slowly slides
off the roof, and since it never quite melts, it curves right around.
--
John
First  |  Prev  |  Next  |  Last
Pages: 1 2 3 4 5
Prev: Trigonometry Tutorial
Next: using two LTC3780 in parallel