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by jimallyn
Tue Feb 24, 2015 8:10 pm
Forum: Beginners
Topic: Using Raspberry Pi for Folding @ Home?
Replies: 3
Views: 2012

Re: Using Raspberry Pi for Folding @ Home?

It will be slow on compute-hungry applications, but it can be done:

http://www.linuxuser.co.uk/tutorials/bo ... spberry-pi
by jimallyn
Sat Feb 21, 2015 8:29 am
Forum: General discussion
Topic: Raspberry Pi 2 as Intercom
Replies: 7
Views: 2220

Re: Raspberry Pi 2 as Intercom

The RPi has a rather high output impedance, 50 ohms, so it isn't really intended to drive speakers. It might drive high impedance headphones OK. You're going to have to use an amplifier to drive your speakers.
by jimallyn
Sat Feb 21, 2015 8:11 am
Forum: Beginners
Topic: How to connect RPi A+ to MacBook Pro?
Replies: 14
Views: 2402

Re: How to connect RPi A+ to MacBook Pro?

PC stands for Personal Computer. A Mac isn't a Personal Computer?
by jimallyn
Sat Feb 21, 2015 6:17 am
Forum: Beginners
Topic: How to connect RPi A+ to MacBook Pro?
Replies: 14
Views: 2402

Re: How to connect RPi A+ to MacBook Pro?

I bought an RPi kit that included a wifi dongle, and that's what I use to connect it to the network. I have no monitor, mouse, or keyboard on the RPi, so I access it from my desktop computer via ssh and VNC. The RPi has ssh enabled by default, and you can connect to it via another computer on the ne...
by jimallyn
Sat Feb 21, 2015 12:31 am
Forum: Beginners
Topic: Compatible Electric Sensor With Raspberry Pi
Replies: 1
Views: 339

Re: Compatible Electric Sensor With Raspberry Pi

If all you want to do is determine how much current is flowing in a wire, the usual way to do that is put a ferrite core with a gap cut in it and a hall effect sensor in the gap.
by jimallyn
Fri Feb 20, 2015 8:36 pm
Forum: Beginners
Topic: GPIO + CCTV
Replies: 14
Views: 1534

Re: GPIO + CCTV

Doing it this way would definitely be a learning experience. That's what we used to call it at the TV repair shop I used to own when we weren't making any money.
by jimallyn
Fri Feb 20, 2015 8:15 pm
Forum: Beginners
Topic: i am a beginner ,am i going on the right track ?
Replies: 5
Views: 707

Re: i am a beginner ,am i going on the right track ?

Learning Python is a good start. I'm working on that now, too. Python works well with the RPi, and there are libraries to do just about anything you could want to do.
by jimallyn
Fri Feb 20, 2015 8:13 pm
Forum: Beginners
Topic: GPIO + CCTV
Replies: 14
Views: 1534

Re: GPIO + CCTV

How to use IO ports, C, and assembly language is a bigger topic than can be covered here. I would start by seeing what format the video source you have uses, and do some Googling (and asking here on the RPi forums) on how to convert that to something you can save to a USB drive.
by jimallyn
Fri Feb 20, 2015 8:10 pm
Forum: Raspbian
Topic: MP3 player with GUI
Replies: 7
Views: 1885

Re: MP3 player with GUI

I installed VLC on my RPi, seems to work fine. I don't know if it will automatically find your USB drive, but you can certainly point it to your USB drive.
by jimallyn
Fri Feb 20, 2015 8:34 am
Forum: Graphics, sound and multimedia
Topic: Windows Media Player
Replies: 9
Views: 2521

Re: Windows Media Player

Codecs are available for the RPi for just about every A/V format you could imagine, as well as players, format converters, and so on.
by jimallyn
Fri Feb 20, 2015 6:42 am
Forum: Advanced users
Topic: Fun with underclocking
Replies: 10
Views: 9218

Re: Fun with underclocking

Might draw a bit less power when underclocking, too.
by jimallyn
Fri Feb 20, 2015 6:37 am
Forum: Beginners
Topic: GPIO + CCTV
Replies: 14
Views: 1534

Re: GPIO + CCTV

Technically, almost anything is possible to do with the GPIO port. If you wanted to use most of the GPIO pins, and write your code in C or assembly language, I'm pretty sure you could interface a CCTV camera. But that's definitely not the easy way to do it!
by jimallyn
Tue Feb 17, 2015 7:14 pm
Forum: General discussion
Topic: Remote Desktop to a Raspberry Pi
Replies: 9
Views: 2325

Re: Remote Desktop to a Raspberry Pi

I'm using TightVNC to access my RPi. There is no keyboard, mouse, or monitor on the RPi itself, everything is done through VNC.

hhoanganh, we do have program like Teamviewer, it's called VNC.
by jimallyn
Tue Feb 17, 2015 7:11 pm
Forum: Python
Topic: keyboard recognition by pygame
Replies: 16
Views: 2671

Re: keyboard recognition by pygame

Are you using that code in a loop? You have to run a loop in pygame, and look for keypresses every time you go through the loop. Or at least that's the way it's shown in the Python book I'm working through.
by jimallyn
Mon Feb 16, 2015 8:37 pm
Forum: General discussion
Topic: Power
Replies: 6
Views: 930

Re: Power

sdcruze, if you haven't yet purchased a Raspberry Pi, you might think about buying a kit containing the RPi, a power supply, a case, a wifi dongle, and so on. I bought one from Canakit, and the power supply is rated at 2.5 amps if I remember correctly, great plenty of power to run the Pi and any acc...
by jimallyn
Mon Feb 16, 2015 8:10 pm
Forum: General discussion
Topic: Which wifi "out of the box " for Pi2
Replies: 3
Views: 859

Re: Which wifi "out of the box " for Pi2

I bought my RPi from Canakit, with the wifi dongle. They sell the same dongle separately:

http://www.canakit.com/raspberry-pi-wifi.html
by jimallyn
Mon Feb 16, 2015 7:07 pm
Forum: Troubleshooting
Topic: Canakit 8gb micro-sd card busted after just 2 days
Replies: 4
Views: 964

Re: Canakit 8gb micro-sd card busted after just 2 days

If you graph the failure rate of electronic devices over time, it generally follows a "bathtub" curve: high infant failures at first, low failure rate for a long time, then rising failure rates as things just plain wear out. You were one of the "lucky" ones to get an infant failure.
by jimallyn
Mon Feb 16, 2015 7:19 am
Forum: Python
Topic: Compiller for Python
Replies: 5
Views: 1092

Re: Compiller for Python

I take that back. 'apt-cache search nuitka' does turn it up. I did not try to install it.
by jimallyn
Mon Feb 16, 2015 7:13 am
Forum: Python
Topic: Compiller for Python
Replies: 5
Views: 1092

Re: Compiller for Python

You might have a look at nuitka. You'll have to compile it from source, I'm sure.

http://nuitka.net/
by jimallyn
Mon Feb 16, 2015 12:00 am
Forum: Graphics, sound and multimedia
Topic: How to stream Pi audio over the internet?
Replies: 12
Views: 10269

Re: How to stream Pi audio over the internet?

Cool! Thanks very much. I'll give that a try. I bought this RPi to learn on, and I am definitely learning a few things!
by jimallyn
Sun Feb 15, 2015 10:14 pm
Forum: Graphics, sound and multimedia
Topic: How to stream Pi audio over the internet?
Replies: 12
Views: 10269

Re: How to stream Pi audio over the internet?

Thanks for the information, ragnarjensen, but that still doesn't accomplish what I want to do. I think it gives me a step in the right direction, though. I don't want to stream a playlist from one application, I want every sound from every application on the Pi to be streamed. Do you know of a way t...
by jimallyn
Sun Feb 15, 2015 4:51 am
Forum: Graphics, sound and multimedia
Topic: How to stream Pi audio over the internet?
Replies: 12
Views: 10269

Re: How to stream Pi audio over the internet?

I have done a bunch of Googling, and have come up with several methods to stream audio over the network, as long as the audio is coming from an external source. Most of them use something like this: arecord -f cd -t raw | oggenc - -r | ssh <user>@<remotehost> mplayer - I have tried variations on tha...
by jimallyn
Sat Feb 14, 2015 10:25 pm
Forum: Advanced users
Topic: Separate Switching Regulator for Pi Power?
Replies: 4
Views: 850

Re: Separate Switching Regulator for Pi Power?

Also, some power supply circuits can be unstable with too much capacitance on them.
by jimallyn
Sat Feb 14, 2015 10:20 pm
Forum: Troubleshooting
Topic: Canakit 8gb micro-sd card busted after just 2 days
Replies: 4
Views: 964

Re: Canakit 8gb micro-sd card busted after just 2 days

I would let Canakit know that it failed. I think the RPi has a one year warranty, but I have no idea what Canakit's warranty on the SD card might be. I also bought my RPi from Canakit and have had no problems with it. Any product will have failures now and then; I guess you're just the lucky one.
by jimallyn
Sat Feb 14, 2015 9:09 pm
Forum: Beginners
Topic: Is Geany on Raspbian? ...
Replies: 19
Views: 5192

Re: Is Geany on Raspbian? ...

Entering 'apt-cache search geany' in terminal shows that not only is geany available, but a bunch of plugins for it, too.

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