Difference between revisions of "User talk:Brian"

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<ref>Phoenix: The Peoples of the Hills: Ancient Ararat and Caucasus by Charles Burney , David Marshall Lang, Phoenix Press; New Ed edition (December 31, 2001)</ref>
 
<ref>Phoenix: The Peoples of the Hills: Ancient Ararat and Caucasus by Charles Burney , David Marshall Lang, Phoenix Press; New Ed edition (December 31, 2001)</ref>
 +
 +
http://brems.iac.isu.edu/mrtg/cleantemp1-day.png <br/>
 +
<!-- http://134.50.3.81/image.png -->
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 +
 +
 +
===Odds===
 +
Finally, <math>\{u_1, u_2, u_3\} = \{ 1, 2\sqrt{3}(t-1/2), 6\sqrt{5}(t^2-t+1/6) \}</math>.
 +
 +
(b) Let <math>B = \{u_1,u_2,u_3\}</math> be the orthonormal basis found above.
 +
For any <math>f(t) = at^2+bt+c \in U</math>
 +
<br/>
 +
<math> f(t) = \sum_{i=1}^3 a_iu_i(t)
 +
= \left( \frac{a}{3}+\frac{b}{2}+c \right) + \left( \frac{\sqrt{3}}{3}(a+b) \right) 2\sqrt{3} \left( t-\frac{1}{2} \right)
 +
  + \left( \frac{\sqrt{5}}{30}a \right) 6\sqrt{5} \left( t^2-t+\frac{1}{6} \right)
 +
</math>
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<br/>
 +
<math>
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= \frac{a}{3}+\frac{b}{2}+c
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  - a - b + 2at + 2bt 
 +
  + at^2 - at + \frac{a}{6}
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</math>
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<br/>
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<math>
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= at^2 + t (a+2b) -\frac{1}{2}(a+b-2c)
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</math>
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[[Micro_Cluster]]<br/>
 
[[Micro_Cluster]]<br/>
  
=VFAT Stuff=
 
 
==ToDo list==
 
* Create PCB Layout
 
* Order misc parts from digikey
 
* Compare Breakout-vx vs. 24-pin flex cable vs. console boards
 
* Add functionality to the web interface
 
* Trace I2C freezing problems on gumstix
 
* Program Digital I/O on Gumstix (for buttons/LEDs)
 
* Specify NIM module for gumstix housing
 
* Combine Gumstix Read/Writes into one transaction
 
 
==Shopping List==
 
* lots of LED's
 
* LED sockets?
 
* 3-bit I2C address selectors
 
* I2C expanders [http://rocky.digikey.com/scripts/ProductInfo.dll?Site=US&V=296&M=PCF8574N 8574]
 
* Sockets for I2C expanders
 
* I2C EEPROM (for testing)
 
* TTL/LVDS converters
 
* LEMO bulkheads
 
* Bulkheads for CLOCK/TRIGGER LVDS (same ribbon type as 34-pin LVDS?)
 
* Hard Reset buttons
 
* Scan mode selector switch
 
* RJ-45 bulkheads
 
* Serial Port bulkheads
 
* TTL - RS232 converter chips
 
* Power regulators (2.5V for VFAT)
 
* caps for power regulators
 
* Gumstix boards
 
* Gumstix mounting screws
 
* Gumstix network adapters
 
* CF cards
 
* 43-pin ribbon cable connectors
 
* VFAT ribbon cable
 
* .1 socket crimp-on pins
 
* .1 crimp tool
 
* various .1 housings
 
* connectors for Gumstix power
 
 
* Breadboard
 
* Power supply
 
* Jumper cables
 
* breadboard - BNC connectors
 
* Resistor kit
 
 
== VFAT connector ordering info ==
 
=== Board connector ===
 
Vertical Male Type Q Standard Height, 50 pin
 
* ERNI 063210 reel, 280 pieces
 
* ERNI 054029 tube w/ cover
 
* ERNI 054021 tube w/o cover
 
* '''Replaced by ERNI 154786?'''
 
 
=== Cable Connectors ===
 
IDC Female Type B with Locking Latches, 50 pin
 
* ERNI 124262 150 pieces/pack
 
* '''Replaced by ERNI 214347?'''
 
 
=== Ribbon Cable ===
 
AWG30, 0.635mm (0.025") spacing
 
* ERNI 034575
 
* Widely compatible
 
 
=== Force Electronics ===
 
[http://www.force-elec.com/ http://www.force-elec.com/ ] <br/>
 
1-800-400-7041
 
* ERNI 063210 $2.70 each, but must buy a reel (280 for $784 total)
 
* ERNI 154786 $6.42 each, 280 min amount
 
** 60 day lead time
 
* ERNI 124262 out for bid
 
* ERNI 214347 $9.92 each, can but individually?
 
 
=== Ad-Tech ===
 
[http://ad-techcci.com http://ad-techcci.com]
 
* ERNI 063210, 054029, 054021 replaced by ERNI 154786
 
** 280 pieces min
 
** $2.71 each
 
** 14-15 week leadtime
 
* ERNI 124262 is replaced with ERNI 214347
 
** 112 pieces min
 
** $5.11 each
 
** 3-4 weeks
 
 
=== Arrow ===
 
[http://www.arrownac.com/aws/pg_welcome http://www.arrownac.com/aws/pg_welcome ]
 
* ERNI 063210 $3.19 each, min qty??
 
** 10 week lead time
 
* ERNI 124262 $4.12 each, min qty??
 
** 8 week leadtime
 
 
=== Hammond Electronics ===
 
[http://www.hammondelec.com/ http://www.hammondelec.com/ ] <br/>
 
1-800-275-2935 main (need to call)
 
1-800-263-5758 Texas
 
* ERNI 063210 listed, but none in stock
 
* ERNI 124262 listed, but none in stock
 
 
=== Mast Distributors ===
 
[http://www.mastd.com/index.html http://www.mastd.com/index.html] <br/>
 
submitted web quote 7/18/07
 
* ERNI 063210 listed, but none in stock
 
* ERNI 124262 listed, but none in stock
 
 
=== PSC Electronics ===
 
[http://www.pscelex.com/index.html http://www.pscelex.com/index.html ] <br/>
 
submitted web quote 7/18/07
 
* ERNI 054029 in stock
 
** 100 pieces
 
** $2.70 each
 
* ERNI 214347
 
** 112 min
 
** 7-10 weeks leadtime
 
** $6.38 each
 
  
=== Sager Electronics ===
+
[[Brian Articles]]
[http://www.sager.com/ http://www.sager.com/] <br/>
 
submitted web quote 7/18/07
 
* ERNI 054029 (min qty 18)
 
* ERNI 124262 (min qty 138)
 

Latest revision as of 23:05, 26 May 2010

<ref>Phoenix: The Peoples of the Hills: Ancient Ararat and Caucasus by Charles Burney , David Marshall Lang, Phoenix Press; New Ed edition (December 31, 2001)</ref>

http://brems.iac.isu.edu/mrtg/cleantemp1-day.png


Odds

Finally, [math]\{u_1, u_2, u_3\} = \{ 1, 2\sqrt{3}(t-1/2), 6\sqrt{5}(t^2-t+1/6) \}[/math].

(b) Let [math]B = \{u_1,u_2,u_3\}[/math] be the orthonormal basis found above. For any [math]f(t) = at^2+bt+c \in U[/math]
[math] f(t) = \sum_{i=1}^3 a_iu_i(t) = \left( \frac{a}{3}+\frac{b}{2}+c \right) + \left( \frac{\sqrt{3}}{3}(a+b) \right) 2\sqrt{3} \left( t-\frac{1}{2} \right) + \left( \frac{\sqrt{5}}{30}a \right) 6\sqrt{5} \left( t^2-t+\frac{1}{6} \right) [/math]
[math] = \frac{a}{3}+\frac{b}{2}+c - a - b + 2at + 2bt + at^2 - at + \frac{a}{6} [/math]
[math] = at^2 + t (a+2b) -\frac{1}{2}(a+b-2c) [/math]


[math]\sqrt{1-e^2}[/math]

Gumstix Crapola

Origin licensing

Brian test.png

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Micro_Cluster


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