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by penguintutor
Wed Nov 13, 2013 10:35 am
Forum: Beginners
Topic: Raspberry pi and infrared sensor.
Replies: 5
Views: 5969

Re: Raspberry pi and infrared sensor.

You can get female to female jumpers - eg,

http://www.skpang.co.uk/catalog/jumper- ... -1117.html
by penguintutor
Wed Nov 13, 2013 10:23 am
Forum: Beginners
Topic: Wireless via Cell phone?
Replies: 11
Views: 2054

Re: Wireless via Cell phone?

Sounds like it may be due to the network dropping the connection at some point. The chromium package is a large file so it could be that it is failing on downloading that whereas it is working better on smaller files. You can try to connect to the sources manually through a browser. To view the loca...
by penguintutor
Tue Nov 12, 2013 5:10 pm
Forum: Beginners
Topic: Out Of Troubleshooting Ideas! Need Help! (SOLVED)
Replies: 6
Views: 1046

Re: Out Of Troubleshooting Ideas! Need Help!

How did you reformat the SD Card?

The recommended way to reformat the card (if using Windows / OS X) is the SD card association reformatting tool.

https://www.sdcard.org/downloads/formatter_4/
by penguintutor
Tue Nov 12, 2013 10:27 am
Forum: Beginners
Topic: Wireless via Cell phone?
Replies: 11
Views: 2054

Re: Wireless via Cell phone?

Can you connect to the Internet at all using the Pi? The wireless configuration tool is fairly basic, whilst it's probably easiest to configure wireless using that you may want to use ifconfig to check whether it's been allocated a valid IP address and to see if there is data being transmitted / rec...
by penguintutor
Tue Nov 12, 2013 10:13 am
Forum: Beginners
Topic: Raspberry pi and infrared sensor.
Replies: 5
Views: 5969

Re: Raspberry pi and infrared sensor.

The NOIR camera is not a true Infrared camera it's just a standard camera without the infrared filter (sees some of the infrared end of the spectrum just outside of the normal visible range). If you just want to detect when someone enters a room then a standard PIR sensor could be used eg. http://ww...
by penguintutor
Tue Nov 12, 2013 10:04 am
Forum: Beginners
Topic: Out Of Troubleshooting Ideas! Need Help! (SOLVED)
Replies: 6
Views: 1046

Re: Out Of Troubleshooting Ideas! Need Help!

Have you tried a different SD card? You can sometimes (very rarely in my experience) end up with corrupted data when a Pi is powered down without a clean shutdown, although it sounds like you still had a clean shutdown even though XBMC wasn't responding. Reimaging the SD card should however been eno...
by penguintutor
Tue Nov 12, 2013 9:49 am
Forum: Beginners
Topic: Why won't my Pi boot? (No signal on TV) (solved)
Replies: 3
Views: 1020

Re: Why won't my Pi boot? (No signal on TV)

First thing I would try is a different power supply. I know you said it was working before, but many problems are related to insufficient power and the supply may have only just been sufficient when you tried it before. Ideally you need a power supply that can provide 1A, although 700mA should be su...
by penguintutor
Tue Nov 12, 2013 9:36 am
Forum: Beginners
Topic: Setting up my Raspberry
Replies: 10
Views: 2295

Re: Setting up my Raspberry

As regards Raspbmc - Connecting via FTP, simply to send Music from my Main PC to my Pi-HD. Yes - I use this method to transfer files - Hotplugging (for the HD) Yes - there is a "safe remove" option in the filemanager to ensure that the drive is removed safely. - Sleepmode (optional) No - not support...
by penguintutor
Mon Nov 11, 2013 4:58 pm
Forum: Troubleshooting
Topic: GPIO
Replies: 9
Views: 1680

Re: GPIO

It's still not clear what you are asking .... "Problem with the power" I understand, but you say "no amperage" - whereas your earlier question made it sound like you had too much voltage drop and so didn't have sufficient voltage on the Raspberry Pi. Not sure what you mean by "Polyfuse run out", it'...
by penguintutor
Mon Nov 11, 2013 4:37 pm
Forum: Beginners
Topic: Setting up my Raspberry
Replies: 10
Views: 2295

Re: Setting up my Raspberry

If an XBMC distribution has all the features you want then it's probably easier to use that rather than try and get xbmc running on Raspbian. Both Raspbmc and Openelec are good.
by penguintutor
Mon Nov 11, 2013 4:35 pm
Forum: Beginners
Topic: compile linux kernel
Replies: 5
Views: 1292

Re: compile linux kernel

You don't explain why you need such a small kernel. It can sometimes help on the forum if you state the reason you want it, so the answer can relate to what you are trying to achieve. Here's a response on using the least amount of space on the SD card - perhaps you have some other thing you are tryi...
by penguintutor
Mon Nov 11, 2013 4:05 pm
Forum: Beginners
Topic: Setting up my Raspberry
Replies: 10
Views: 2295

Re: Setting up my Raspberry

- When I use Raspbmc on my Pi, will I be able to connect my Pi to my network via WLAN, like I would be able with a normal Linux System? The intention behind this idea is, that I want to drag and drop music from my main PC onto the external Harddrive which is plugged into my Pi. Yes, as long as you ...
by penguintutor
Wed Aug 21, 2013 9:04 am
Forum: Other projects
Topic: Controlling many lights individually
Replies: 20
Views: 7344

Re: Controlling many lights individually

This is similar in concept to a project I'm working on, but your idea is a bit more ambitious than mine (at least in terms of the number of lights). My project is using a combination of Arduino and Raspberry Pi - which allows it to run a simple Arduino only mode as well as full computer control runn...
by penguintutor
Mon Aug 19, 2013 10:48 am
Forum: Beginners
Topic: First power-up...First question
Replies: 4
Views: 707

Re: First power-up...First question

If the USB drive is always connected then I'd go with the fstab route. This is what I use on my media centre. The downside of that is that if it is not available then the computer will hang when trying to mount it, but if all your data is on the USB then it's probably not usable without the usb driv...
by penguintutor
Mon Aug 19, 2013 10:25 am
Forum: General discussion
Topic: Interfacing Pi w/ Arduino Uno
Replies: 4
Views: 7258

Re: Interfacing Pi w/ Arduino Uno

How does my RPi, running on a 5v input, power another 5v piece of hardware such as the Uno while still running itself? The supply in to the Pi is connected to the supply for the USB sockets. There is a poly fuse which should have minimal voltage drop as long as working within the designed limits. I...
by penguintutor
Fri Jul 19, 2013 8:42 pm
Forum: Beginners
Topic: I have no idea what I need. Some advice?
Replies: 3
Views: 748

Re: I have no idea what I need. Some advice?

To share files across a network then I'd recommend Samba as that will work with both Linux and Windows computers. To install use sudo apt-get install samba The configuration is in /etc/samba/smb.conf It's a long configuration document, but well documented. For a remote desktop onto a Pi then I sugge...
by penguintutor
Thu Jul 18, 2013 2:18 pm
Forum: Other projects
Topic: Powering the Pi from my doorbell.
Replies: 6
Views: 2229

Re: Powering the Pi from my doorbell.

I would be unhappy about using a "bell transformer" in this situation. Generally, it would be designed to sit for hours un-loaded, with only the occasional spike of current taken. That is a good point. It depends upon the transformer as some are designed for "permanent loads" vs short period loads....
by penguintutor
Thu Jul 18, 2013 1:23 pm
Forum: Beginners
Topic: Proxy Exceptions
Replies: 3
Views: 2118

Re: Proxy Exceptions

Was not sure if it would be set system wide or just the browser. It's actually both, the following are the most common system variables that are used to set which proxies are used (or which networks are excluded from the proxy requests in the case of no_proxy). http_proxy https_proxy ftp_proxy no_p...
by penguintutor
Wed Jul 17, 2013 10:44 pm
Forum: Networking and servers
Topic: Installing Wordpress
Replies: 1
Views: 737

Re: Installing Wordpress

Have you unzipped the files - they are normally gz files - so you need to run gunzip against the file. Also you say you are trying to run setup-mysql -n wordpress localhost - with a space before the '-n' But the error says 'setup-mysql-n' - without a space before the -n You need to cd /usr/share/doc...
by penguintutor
Wed Jul 17, 2013 10:34 pm
Forum: Beginners
Topic: Proxy Exceptions
Replies: 3
Views: 2118

Re: Proxy Exceptions

This appears to be a limitation within Midori. It's causing me a bit of a problem as well. You can install another browser instead which does have the ability to bypass proxies for certain address ranges - eg. chromium or firefox. Unfortunately the other browsers tend to be a little more demanding o...
by penguintutor
Wed Jul 17, 2013 10:15 pm
Forum: Other projects
Topic: Powering the Pi from my doorbell.
Replies: 6
Views: 2229

Re: Powering the Pi from my doorbell.

With a bridge rectifier you'll normally lose about 1.2 v (0.6 v across each diode). I'd recommend taking the 12v supply through a bridge rectifier (some capacitors for smoothing) and a 5v voltage regulator such as a L7805. This assumes that the transformer is able to supply at least 750mA in additio...
by penguintutor
Wed Jul 17, 2013 9:37 pm
Forum: Beginners
Topic: Early Years PI
Replies: 7
Views: 4222

Re: Early Years PI

I've been teaching my 7 year old (almost 8) on a Raspberry Pi http://www.penguintutor.com/news/raspberrypi/programming-child . We've progressed since that last post, but I'll be providing an update in future. We looked at Scratch on the Laptop before getting the Pi, but the Pi helped to focus a bit ...
by penguintutor
Wed Jul 17, 2013 9:34 am
Forum: Beginners
Topic: basic necessities
Replies: 6
Views: 1698

Re: basic necessities

I am glad ... the Raspberry Pi Education Manual is key to getting programmers going. I am glad you reminded me of http://www.raspberrypi.org/archives/2965 because I had lost track of where I found my copy down in the archives. I think it would be good to have a link to say the education manual on o...
by penguintutor
Tue Jul 16, 2013 10:44 pm
Forum: Automation, sensing and robotics
Topic: Power the Pi from a SINGLE AA battery
Replies: 5
Views: 2077

Re: Power the Pi from a SINGLE AA battery

easy enough to calculate how long it would last. Current draw of the pi * any inefficieny in the 1.2 > 5v conversion / amp hours of the battery (usually only 1-2) Whilst those are the main variables in how much energy you can get from the battery it doesn't actually provide an answer to at which po...
by penguintutor
Tue Jul 16, 2013 10:25 pm
Forum: Raspbian
Topic: Is X-Windows present on the Raspberry Pi (Raspbian)
Replies: 9
Views: 19049

Re: Is X-Windows present on the Raspberry Pi (Raspbian)

Raspbian uses X.org as standard. There is talk of moving to Wayland/Weston in future, but even then there will probably be a way of still running X.org as the relevant packages are on the repositories. To find out more about X.org type man xorg If you need to install the development libraries then I...

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