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by ajford
Tue Dec 20, 2011 5:57 am
Forum: Other projects
Topic: Passively Cooled Web-Server
Replies: 112
Views: 12060

Re: Passively Cooled Web-Server

<t>@obarthelemy: While I agree with the fact that it can be dangerous, it's equally as dangerous checking the transmission fluid on your car! I find telling someone to NEVER do something to be opposite the purpose of RasPi: getting people interested in hardware and electronics.<br/> <br/> I successf...
by ajford
Wed Nov 02, 2011 12:29 am
Forum: Staffroom, classroom and projects
Topic: RasPi for Higher Ed Radio Astron
Replies: 17
Views: 4912

Re: RasPi for Higher Ed Radio Astron

Yeah, I'd have to look into using the GPU to do some preliminary processing. If I could use the GPU to FFT the data, that would be fantastic. I still have a lot to learn about DSP and the various techniques possible using the GPU.
by ajford
Tue Nov 01, 2011 1:17 am
Forum: Staffroom, classroom and projects
Topic: RasPi for Higher Ed Radio Astron
Replies: 17
Views: 4912

Re: RasPi for Higher Ed Radio Astron

<t>@WizardOfOz: Yeah, I goofed and left off the zeros on my first request, but realized that a 2-2.5MSa/s sampler would be good enough for classroom purposes, as you could pick up AM radio stations and process data from it. As well as source simple AM transmitters to encode anything you want for cla...
by ajford
Sun Oct 30, 2011 3:48 pm
Forum: Staffroom, classroom and projects
Topic: RasPi for Higher Ed Radio Astron
Replies: 17
Views: 4912

Re: RasPi for Higher Ed Radio Astron

<r>Quote from Gert van Loo on October 29, 2011, 18:26<br/> Check out the ADC website. They have them up to 250MSPS 16 bits wide. Your talking 1.5Gbits/sec of data. You will definitely need the Raspi CSI port for that. But then what do you do with all that data...<br/> I am just joking. I assume with...
by ajford
Fri Oct 28, 2011 1:40 pm
Forum: Staffroom, classroom and projects
Topic: RasPi for Higher Ed Radio Astron
Replies: 17
Views: 4912

Re: RasPi for Higher Ed Radio Astron

Hey Gert,
Thanks for the info, I'll look into Analogue's ADC.
Any chance you know of any 200MSa/s ADCs? I figure it might work as a cheap(price) radio astronomy receiver for a new telescope array design I'm looking into.

Thanks a lot!
by ajford
Thu Oct 27, 2011 4:15 pm
Forum: General discussion
Topic: raspberrypi.COM
Replies: 28
Views: 2975

Re: raspberrypi.COM

I\'m in for a sticker... or two... maybe 5 ;)
by ajford
Thu Oct 27, 2011 3:40 pm
Forum: Staffroom, classroom and projects
Topic: RasPi for Higher Ed Radio Astron
Replies: 17
Views: 4912

Re: RasPi for Higher Ed Radio Astron

<r>Quote from Gert van Loo on October 27, 2011, 09:47<br/> 2-2.5MSa/s<br/> Are you talking samples of 8 or 16 bits wide? 2.5MHz at 16 bits wide would be 40Mbits/sec. You are at the limit of our SPI capabilities there. (You need good quality I/O, the data rate itself is not the problem.)<br/> Theoret...
by ajford
Thu Oct 27, 2011 2:00 am
Forum: General programming discussion
Topic: Lets get a beginner programing thread in here!
Replies: 56
Views: 10723

Re: Lets get a beginner programing thread in here!

<r>Quote from Bacan on October 27, 2011, 01:36<br/> Quote from Beakster on October 26, 2011, 23:44<br/> I'm probably in the minority here, but I'm most interested in programming the R-Pi in Assembler and executing my code directly from the boot loader without Linux or any other operating system gett...
by ajford
Wed Oct 26, 2011 11:32 pm
Forum: Staffroom, classroom and projects
Topic: RasPi for Higher Ed Radio Astron
Replies: 17
Views: 4912

Re: RasPi for Higher Ed Radio Astron

I'm at the University of Texas at Brownsville (USA), and I'm also a Research Assistant at the Center for Radio Astronomy within the Physics and Astronomy Department here at UT Brownsville.
by ajford
Wed Oct 26, 2011 9:58 pm
Forum: Staffroom, classroom and projects
Topic: RasPi for Higher Ed Radio Astron
Replies: 17
Views: 4912

Re: RasPi for Higher Ed Radio Astron

<r>Hey all,<br/> Looking for some help on an idea I've got. I'm currently an undergraduate student in Radio Astronomy. When paired with an ADC, it seems like the RasPi would make an excellent instrument for education in the radio astronomy field.<br/> <br/> While not quite research level, if the sys...
by ajford
Wed Oct 26, 2011 9:26 pm
Forum: General programming discussion
Topic: Lets get a beginner programing thread in here!
Replies: 56
Views: 10723

Re: Lets get a beginner programing thread in here!

<r>Quote from MarkSmith on October 16, 2011, 16:15<br/> Depends on the age of the kid. 16+, I would be tempted to say just learn C/C++ and stop your whining and do it properly. <E>;)</E><br/> <br/> <br/> If it weren't for the fact that I started with C++, I'd be offended <E>;)</E><br/> <br/> I vote ...
by ajford
Wed Oct 26, 2011 9:19 pm
Forum: Staffroom, classroom and projects
Topic: Pygame
Replies: 29
Views: 6294

Re: Pygame

Even as 'Legacy', I vote Python 2.X, or even both. With VirtualEnv, you can run both side by side with out any troubles if needed.

In short, why not both?
by ajford
Thu Oct 20, 2011 1:46 am
Forum: Other projects
Topic: Using a Rasberry Pi as part of a cosplay prop
Replies: 13
Views: 7882

Re: Using a Rasberry Pi as part of a cosplay prop

<r>For FM, you can use <URL url="http://www.sparkfun.com/products/10344">http://www.sparkfun.com/products/10344</URL> if you want to implement a serial interface to it, or this parallax module if you want i2c: <URL url="http://www.parallax.com/Store/.....roductName">http://www.parallax.com/Store/......
by ajford
Wed Oct 19, 2011 4:19 am
Forum: Other projects
Topic: Suggestions for pre-release tutorials required!
Replies: 15
Views: 2272

Re: Suggestions for pre-release tutorials required!

<r>Quote from PiOfCube on October 18, 2011, 11:32<br/> ....<br/> I'll be using stripboards to begin with and may also at a later point show how to design PCB layouts and (if I can find a reliable and cheap PCB prototyping company) get them produced for those that want a professional finish or would ...
by ajford
Wed Oct 19, 2011 4:09 am
Forum: Other projects
Topic: Raspberry Pi Pad
Replies: 6
Views: 1943

Re: Raspberry Pi Pad

<r>Honestly, SMD work isn't that difficult. While some SMD can be insane (0402 and smaller), most can be soldered by hand if you have a good soldering iron and some solder wick. Stick to 0805 or greater (1210 and greater is really nice when you're just starting) if you can manage, and avoid QFP when...

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