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by penguintutor
Thu Jun 12, 2014 11:24 am
Forum: Teaching and learning resources
Topic: Question regarding RPI PCB design Layout
Replies: 1
Views: 3275

Re: Question regarding RPI PCB design Layout

You need to look at the circuit diagram schematics rather than the PCB layout. The PCB has multiple layers and trying to trace the links by hand is not practical. http://www.raspberrypi.org/documentation/hardware/raspberrypi/Raspberry-Pi-Rev-2.1-Model-AB-Schematics.pdf You need to look at page 3 top...
by penguintutor
Thu Apr 03, 2014 9:32 am
Forum: General discussion
Topic: New Website
Replies: 94
Views: 35139

Re: New Website

Also similar image sizes for some of the other images - eg. "raspberrypi-model-b.jpg" is 2MB - 4217 x 2811 px scaled to 350 x 233px
by penguintutor
Thu Apr 03, 2014 9:21 am
Forum: General discussion
Topic: New Website
Replies: 94
Views: 35139

Re: New Website

The performance issues are due to the image sizes of the blog previews carousel on the front page. For example - the "new-website" image is 1202px x 991 px - but only displayed as 308 x 250 so it could be approx 72KB rather than 622KB April fool image - 1432 x 1029 px - displayed as 308 x 250px Quak...
by penguintutor
Thu Mar 13, 2014 4:58 pm
Forum: Automation, sensing and robotics
Topic: Can someone build me a Pi Bot?
Replies: 13
Views: 2799

Re: Can someone build me a Pi Bot?

That is very similar to the Magician Chassis that I've been working on.

I've put a quick overview at: http://www.penguintutor.com/electronics/rubyrobot but I'm still working on the documentation.

Hopefully I should have something available in a few days time.
by penguintutor
Tue Mar 04, 2014 3:18 pm
Forum: Teaching and learning resources
Topic: Learning Scratch for primary school teachers
Replies: 0
Views: 766

Learning Scratch for primary school teachers

This is an introduction to Scratch that I ran with teachers from a local primary school. The presentation is intended as a practical hands-on session with live demonstration (so may be hard to follow without the explanation), but there is also a guide that goes through creating a quiz game in Scratc...
by penguintutor
Sun Jan 26, 2014 7:49 pm
Forum: Beginners
Topic: Issues with permissions on a flash drive
Replies: 12
Views: 2386

Re: Issues with permissions on a flash drive

Are you saying that I can keep the drive formatted as fat32 but mount it as ext3 so that the rights will work properly? No - you need to format the partition as ext3 to be able to mount it as such. Normally you should change the partition type to a linux partition (otherwise fdisk and other softwar...
by penguintutor
Wed Dec 04, 2013 4:32 pm
Forum: Scratch
Topic: Unable to load Scratch files from a Raspberry Pi onto a PC
Replies: 15
Views: 4282

Re: Unable to load Scratch files from a Raspberry Pi onto a

Great - thanks for looking into this so quickly.

Is this going to get pushed to the repositories so I can just do an apt-get update?
by penguintutor
Mon Dec 02, 2013 3:04 pm
Forum: Scratch
Topic: Unable to load Scratch files from a Raspberry Pi onto a PC
Replies: 15
Views: 4282

Unable to load Scratch files from a Raspberry Pi onto a PC

I have already filed this into the appropriate forum on the Scratch website, but have not had any response. Anyone on here been able to take files from Scratch on a Raspberry Pi and load them onto Scratch 1.4 on a PC. I have been using Scratch in school using a Raspberry Pi and Scratch 1.4. I am try...
by penguintutor
Tue Nov 26, 2013 12:06 pm
Forum: General discussion
Topic: Using PS3 controller as mouse ?
Replies: 2
Views: 1312

Re: Using PS3 controller as mouse ?

Possible, but difficult. There are a couple of links here. http://www.madsoft.org/2008/12/16/configuring-the-playstation-3-controller-on-linux/ This is a step by step guide, but it's not written for the Raspberry Pi so you may need to tweak it somewhat. https://github.com/chemisus/ps3board This seco...
by penguintutor
Tue Nov 26, 2013 11:32 am
Forum: Automation, sensing and robotics
Topic: Raspberry Pi Home Automation Ideas...
Replies: 30
Views: 35262

Re: Raspberry Pi Home Automation Ideas...

This is a very basic home automation project that I've put together. http://www.penguintutor.com/electronics/simple-homeautomation-raspberrypi It's very basic - simple on/off of lights and sockets, but has the advantage of using a commercial product without any need to get involved with mains wiring...
by penguintutor
Tue Nov 26, 2013 11:24 am
Forum: Raspbian
Topic: fsck on boot - ctrl-D - how to disable ?
Replies: 11
Views: 12732

Re: fsck on boot - ctrl-D - how to disable ?

Edit your /etc/fstab and set any file systems you don't want checked to have a 0 in the 6th (last) field. See the following from the fstab man page: The sixth field (fs_passno). This field is used by the fsck(8) program to determine the order in which filesystem checks are done at reboot time. The r...
by penguintutor
Thu Nov 21, 2013 11:46 am
Forum: HATs and other add-ons
Topic: 2millions PI, how many Gertboard
Replies: 14
Views: 3220

Re: 2millions PI, how many Gertboard

Should be able to buy it now. Oh yes I can see it on the Farnell and CPC website, although it's still not listed on the Farnell Raspberry Pi micro-site (CPC and the standard Farnell site don't charge postage (there is a minimum order value for Farnell, but it's only a little more than the Gertduino...
by penguintutor
Wed Nov 20, 2013 3:36 pm
Forum: Automation, sensing and robotics
Topic: My project - i need suggestions & help
Replies: 10
Views: 1906

Re: My project - i need suggestions & help

I'm not aware of any boards specifically for servos, but take a look at: http://www.raspberrypi.org/archives/5269 This appears to be a simple H-Bridge motor driver board based around the SN754410, which is the same as I have with my project (but mine is currently on breadboard). I was looking at cre...
by penguintutor
Wed Nov 20, 2013 3:28 pm
Forum: HATs and other add-ons
Topic: 2millions PI, how many Gertboard
Replies: 14
Views: 3220

Re: 2millions PI, how many Gertboard

The GertDuino looks good.

Sounds like Shield for the Raspberry Pi with an Arduino on, that then allows you to use other Arduino sheilds on top.

In fact that sounds like it would be a perfect fit for a project I'm working on.

Looking forward to that being available to buy.
by penguintutor
Tue Nov 19, 2013 10:36 am
Forum: HATs and other add-ons
Topic: 2millions PI, how many Gertboard
Replies: 14
Views: 3220

Re: 2millions PI, how many Gertboard

I don't know how many Gertboards are in the wild, but I don't see many of them in actual use, and in fact I haven't actually done anything with mine since I bought it (although that's because I've been working on other things instead). I have thought of writing some tutorials using the Gertboard, bu...
by penguintutor
Tue Nov 19, 2013 10:21 am
Forum: Raspbian
Topic: Track Internet Usage
Replies: 7
Views: 10610

Re: Track Internet Usage

There are a few different Linux tools that can map network usage, but as you have discovered most are based upon monitor a specific interface rather than down to the application level. I haven't tried all these with the Raspberry Pi, but have installed them on a regular Linux computer. Two useful to...
by penguintutor
Tue Nov 19, 2013 9:33 am
Forum: Automation, sensing and robotics
Topic: My project - i need suggestions & help
Replies: 10
Views: 1906

Re: My project - i need suggestions & help

I have created a robot vehicle based on the Magician Robot Chassis I am writing up the details at the moment. It's going to be a detailed guide so may take a while before the write-up is complete, but for now you can see an overview including parts-list at: http://www.penguintutor.com/electronics/ru...
by penguintutor
Thu Nov 14, 2013 2:23 pm
Forum: Troubleshooting
Topic: /etc/init.d/networking ifup permission denied
Replies: 2
Views: 2028

Re: /etc/init.d/networking ifup permission denied

The file /sbin/ifup should be an executable: $ ls -l /sbin/ifup -rwxr-xr-x 3 root root 43768 Apr 15 2013 /sbin/ifup [email protected]:~$ file /sbin/ifup /sbin/ifup: ELF 32-bit LSB executable, ARM, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.26, BuildID[sha1]=0xe28424077...
by penguintutor
Thu Nov 14, 2013 1:54 pm
Forum: General discussion
Topic: How many Pi's do you own?
Replies: 53
Views: 9864

Re: How many Pi's do you own?

Just 8 Rasberry Pis at the moment as I gave one of mine away as a present (already setup with Raspbmc). Most of them have a specific use Proxy XBMC x2 Kids programming platform x2 (though only one child is really old enough to be using it at the moment - hoping to start with the younger one soon) Ro...
by penguintutor
Thu Nov 14, 2013 1:38 pm
Forum: Beginners
Topic: Setting up my Raspberry
Replies: 10
Views: 2296

Re: Setting up my Raspberry

Ftp is on port 21 which is the default port. You should just need to put in the IP address of the Raspberry Pi into filezilla and it should connect. If it has anything else in the port field change it to 21. You probably want to choose PASV mode as well. There are some FAQs on the Raspbmc website he...
by penguintutor
Thu Nov 14, 2013 12:00 pm
Forum: Beginners
Topic: Wireless via Cell phone?
Replies: 11
Views: 2056

Re: Wireless via Cell phone?

It sounds like a problem with your network connection. If it fails to download through a browser then its even more likely to fail with apt as it stops on a failure rather than retrying. It sounds like you may need to use a different network or download the files outside of apt and install using apt...
by penguintutor
Thu Nov 14, 2013 11:55 am
Forum: Troubleshooting
Topic: No Network Connection
Replies: 30
Views: 73361

Re: No Network Connection

It seams odd that it received two packets, but then the rest are errors. There are a lot of dropped packets, but they could be IPV6 or some other protocol - so you can probably ignore that part, but the errors are a concern. Have you checked that you don't have a duplicate IP address on the same net...
by penguintutor
Thu Nov 14, 2013 10:55 am
Forum: Beginners
Topic: STICKY: Getting Started with the Raspberry Pi
Replies: 313
Views: 1231460

Re: How to start using your Raspberry Pi

The SD card association disk formatter is usually required to reformat an SD card when it has been split into multiple partitions (after installing an image directly, or in the case of NOOBs after you have selected an operating system to install from the boot screen). It is not normally required for...
by penguintutor
Wed Nov 13, 2013 11:41 am
Forum: Troubleshooting
Topic: No Network Connection
Replies: 30
Views: 73361

Re: No Network Connection

I agree with DeeJay that an Ethernet connection normally works fine without any configuration required. I've only once had the Ethernet connection not work which was due to a power problem - something I spent ages working on before swapping power supply and it started working. In addition to the com...
by penguintutor
Wed Nov 13, 2013 11:05 am
Forum: Beginners
Topic: how to download & install software to hard drive
Replies: 3
Views: 651

Re: how to download & install software to hard drive

I don't believe you can do that using apt-get, but you can if you download an install manually - eg. using dpkg to install. For example you may prefer to install the executable into /usr/local/bin instead of /usr/bin To install a package at a different directory then you need to provide the option o...

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