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by yv1hx
Thu Nov 22, 2012 6:45 pm
Forum: Español
Topic: 64 Raspberry y piezas de Lego = Supercomputadora
Replies: 3
Views: 1416

Re: 64 Raspberry y piezas de Lego = Supercomputadora

Yo estoy armando mi cluster basado en este proyecto...Pero claro, con solo dos R-Pi...aaahhh...y sin legos...Aqui son carisimos!!!
by yv1hx
Thu Nov 22, 2012 6:39 pm
Forum: Español
Topic: Hacer Backup de SD, tipo clonezilla
Replies: 4
Views: 6064

Re: Hacer Backup de SD, tipo clonezilla

Puedes usar win32 disk imager si deseas guardar tu imagen en alguna maquina Güindows que dispongas ;) lo puedes descargar desdehttp://www.softpedia.com/get/CD-DVD-Too ... ager.shtml

Suerte...
by yv1hx
Thu Nov 22, 2012 6:36 pm
Forum: Español
Topic: Cómo averiguar remotamente la IP pública de tu RasPi
Replies: 9
Views: 16442

Re: Cómo averiguar remotamente la IP pública de tu RasPi

Hola a todos,

Yo recomendaria el uso de la plataforma http://www.no-ip.com que dispone de fuentes para su cliente de monitoreo de IP local en su pagina.

Suerte...
by yv1hx
Sat Nov 10, 2012 5:51 pm
Forum: Other programming languages
Topic: WRF & NetCDF on Raspberry-Pi
Replies: 24
Views: 9864

Re: WRF & NetCDF on Raspberry-Pi

@yv1hx: It seems you have not installed the netcdf library or at least not the development headers for it. The package name for the headers should be `libnetcdf-dev`. Dear BlackJack, I have this project in the freezer for now, a bunch of bad things have occurred to my and my parents in the last mon...
by yv1hx
Thu Oct 04, 2012 11:01 pm
Forum: Other programming languages
Topic: WRF & NetCDF on Raspberry-Pi
Replies: 24
Views: 9864

WRF & NetCDF on Raspberry-Pi

Hi R-Pi fanatics! I´m trying to build the Weather forecasting model (WRF) on my R-Pi, towards to build a two nodes cluster when my second R-Pi arrives at some point, but I cannot build the NetCDF package because i´m always getting the message: <snip> checking for ptrdiff_t... yes checking for stdlib...
by yv1hx
Fri Sep 28, 2012 12:24 am
Forum: Networking and servers
Topic: Web Server running only on Solar Power
Replies: 50
Views: 22520

Re: Web Server running only on Solar Power

Be sure you have a common ground reference between the different power supplies, this can be a lot of source of problems. Also, the power supplies have good regulation? If you have a oscilloscope you might have a look ...
by yv1hx
Sun Sep 16, 2012 8:13 am
Forum: General discussion
Topic: Venezuela - Just got my Raspberry PI
Replies: 8
Views: 1401

Re: Venezuela - Just got my Raspberry PI

[quote="RussoNC"...snip... with UPS, but here in NC this company does not "exist". So I don't know how they will send my PI when it's arrives in NC.
Thanks in advance. :D[/quote]

Be patient, they usually uses a local partner to delivery the parcels..
by yv1hx
Sat Sep 01, 2012 12:39 am
Forum: Español
Topic: SAI para mi raspberry
Replies: 17
Views: 9288

Re: SAI para mi raspberry

Si he hecho algunas pruebas y efectivamente alimentando la pi desde los puertos USB no termina de arrancar, bueno entonces lo que se podría hacer es poner en paralelo la bateria y el alimentador micro USB Aunque eso suena algo mas sensato, debes tener en cuenta que el voltaje de carga de cualquier ...
by yv1hx
Fri Aug 31, 2012 10:39 pm
Forum: Español
Topic: SAI para mi raspberry
Replies: 17
Views: 9288

Re: SAI para mi raspberry

La manera mas sencilla y barata es las siguiente: Accidentalmente descubrí que se puede alimentar a la raspberry por los USB en lugar del micro USB para ello se necesita un cargador con usb macho, pero no son muy habituales, lo que seguro que tendrás es uno con un micros USB que + hub USB hace la m...
by yv1hx
Thu Aug 30, 2012 5:01 pm
Forum: Español
Topic: SAI para mi raspberry
Replies: 17
Views: 9288

Re: SAI para mi raspberry

Hola amigos, La opcion de construir un SAI a partir de componentes electronicos es ciertamente muy interesante, pero deben tener en cuenta que la RPi es muy sensible a las variaciones de voltaje, tecnicamente hablando ir mas alla de mas o menos 5% en el voltaje de alimentacion puede ser catastrofico...
by yv1hx
Thu Aug 30, 2012 3:46 pm
Forum: Automation, sensing and robotics
Topic: Weather Satellite Receiving Station
Replies: 19
Views: 16361

Re: Weather Satellite Receiving Station

Please have a look to this site: http://www.df2fq.de/english_version/r2fx_eng.html, maybe is a bit expensive, but may be worth the effort.
by yv1hx
Thu Aug 30, 2012 3:32 pm
Forum: Automation, sensing and robotics
Topic: Python/PyWeather collaboration??
Replies: 35
Views: 13652

Re: Python/PyWeather collaboration??

Anyone with a reasonable working of Python (and ideally not too far from the GMT timezone) willing to provide some collaboration in the sense of help/assistance in getting an established Python program working? This is a weather-related program called PyWeather which I can't yet get running on the ...
by yv1hx
Fri Aug 24, 2012 4:04 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interfacing Raspberry Pi with RTC1307 without level shifter?
Replies: 31
Views: 5898

Re: Interfacing Raspberry Pi with RTC1307 without level shif

My understanding is that that is usually but not always the case - some slave devices will only work at 5v and also have pull-ups to their own supply :o so be sure to check and if necessary use something like this: http://www.ebay.co.uk/itm/180881703478?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497....
by yv1hx
Fri Aug 24, 2012 3:56 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interfacing Raspberry Pi with RTC1307 without level shifter?
Replies: 31
Views: 5898

Re: Interfacing Raspberry Pi with RTC1307 without level shif

mahjongg: Thanks for your answer, my main concern is the SDA bus, because the DS1307, when "asked" from the R-Pi at 3.3vdc, will "answer" with TTL logic levels (usually 4volts high level) and this voltage exceeds the 3.3v R-Pi spec, then possibly frying my valuable R-Pi :shock: Nope, Mahjongg is ri...
by yv1hx
Thu Aug 23, 2012 3:10 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interfacing Raspberry Pi with RTC1307 without level shifter?
Replies: 31
Views: 5898

Re: Interfacing Raspberry Pi with RTC1307 without level shif

I've done a quick search and found these interesting documents about interfacing 3.3v~5V logic levels: http://www.kip.uni-heidelberg.de/lhcb/Publications/external/AN97055.pdf http://www.nxp.com/documents/application_note/AN240.pdf http://www.newark.com/pdfs/techarticles/microchip/3_3vto5vAnalogTipsn...
by yv1hx
Thu Aug 23, 2012 4:25 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interfacing Raspberry Pi with RTC1307 without level shifter?
Replies: 31
Views: 5898

Re: Interfacing Raspberry Pi with RTC1307 without level shif

ailwyn wrote:.... whether this is recommended or not I don't know.
ailwyn: Good Point! :lol: I should raise my doubt to the R-Pi hardware design team, Anyone knows a way to contact them?
by yv1hx
Thu Aug 23, 2012 4:21 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interfacing Raspberry Pi with RTC1307 without level shifter?
Replies: 31
Views: 5898

Re: Interfacing Raspberry Pi with RTC1307 without level shif

should work, as high levels are only provided by pullups, and pullups to 3V3 levels are built into and enabled on the I2C GPIO's of the PI. Additionally the RTC1307 is comfortable with 3V3 logic levels, as it sees as "high" anything above 2,2 Volt. mahjongg: Thanks for your answer, my main concern ...
by yv1hx
Tue Aug 21, 2012 2:59 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Interfacing Raspberry Pi with RTC1307 without level shifter?
Replies: 31
Views: 5898

Interfacing Raspberry Pi with RTC1307 without level shifter?

Hello everyone, My apologize if this matter has been managed before, but I cannot find any references. This article http://binerry.de/post/26685647322/raspberry-pi-and-i2c the author talks about interfacing directly the DS1307 I2C RTC to the R-Pi without using any level shifters (the R-Pi have 3.3Vd...
by yv1hx
Tue Aug 21, 2012 2:29 am
Forum: General discussion
Topic: Venezuela - Just got my Raspberry PI
Replies: 8
Views: 1401

Re: Venezuela - Just got my Raspberry PI

Great to hear that!

At least my R-Pi is not alone in our beloved country :D
by yv1hx
Wed Aug 01, 2012 5:54 pm
Forum: Networking and servers
Topic: Web Server running only on Solar Power
Replies: 50
Views: 22520

Re: Web Server running only on Solar Power

I guess this link can be useful for you while calculating your Solar Panel:

http://www.davisnet.com/product_documen ... -power.pdf

Best regards,
by yv1hx
Thu Jul 26, 2012 2:17 am
Forum: General discussion
Topic: CentOs on a pi?
Replies: 19
Views: 56015

Re: CentOs on a pi?

CentOS is my favorite linux distribution, so I should test in my RPi at some point :D

(Please Forgive me, I'm a hardware guy :geek: )
by yv1hx
Sat Jul 21, 2012 11:42 pm
Forum: General discussion
Topic: 3rd world and Credit Cards
Replies: 18
Views: 2892

Re: 3rd world and Credit Cards

Only to put some quotes in this thread: My country (Venezuela) is certainly not a third world country, but all Venezuela issued credit cards are limited to 400 US$ year maximum, (or the equivalent in other currency) for electronics transactions (I mean any kind of internet transactions). If any Vene...

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