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by nrdb
Fri Mar 09, 2012 3:11 am
Forum: General discussion
Topic: R-Pi as a thin client using LTSP
Replies: 19
Views: 12215

Re: R-Pi as a thin client using LTSP

<t>I have used some basic mini-itx cards as LTSP clients, they only have a 800MHz processor and a 10MBit ethernet.  They work fine as clients.  There are no local-apps configured, everything works on the Server.<br/> <br/> My only concern with the Rpi is that the ethernet goes via the USB and that m...
by nrdb
Thu Feb 23, 2012 12:53 pm
Forum: General discussion
Topic: R-Pi as a thin client using LTSP
Replies: 19
Views: 12215

Re: R-Pi as a thin client using LTSP

<t>I maintain a LTSP setup for a company I do contract work for.<br/> <br/> The image that is downloaded via PXE to the clients almost never changes, this is just used by the client to connect its screen and keyboard to the server.<br/> <br/> The user then logs in to the server (via the client) and ...
by nrdb
Sun Jan 01, 2012 1:55 am
Forum: General discussion
Topic: SD Card image repository
Replies: 3
Views: 1910

Re: SD Card image repository

<t>I would like to see a part of this site where people can download/upload SD card images.<br/> <br/> So that you can get multiple images.  Say you want a special OS or with specific applications.  (e.g. Debian Squeeze with Blender installed)<br/> <br/> A few things would be needed.<br/> <br/> <br/...
by nrdb
Mon Sep 19, 2011 2:18 am
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 249511

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced

<r>You could also use this as a teaching environment for basic electronics.<br/> <br/> Have some simple i2c or multi-drop rs232 cards for doing various things.<br/> * open-collector outputs for relays, small motors, lights etc.<br/> * r/c servo motor controllers for moving things<br/> * opto-isolate...
by nrdb
Mon Sep 19, 2011 12:08 am
Forum: General discussion
Topic: USB power
Replies: 8
Views: 1906

Re: USB power

<t>Would it be possible to put a jumper on the Rpi so that you can choose if the Rpi supplies power to the USB port or takes power from it?<br/> <br/> I was thinking this could be handy if you made the Rpi act as a USB client. I can think of a number of project ideas where that would be nice to try....
by nrdb
Sat Sep 10, 2011 2:35 pm
Forum: Other projects
Topic: UAV
Replies: 51
Views: 12785

Re: UAV

<t>I think your biggest problem will be keeping this in the air. As the air pressure and temperature changes the gas envelope will need to be inflated/deflated to maintain neutral buoyancy. This will mean if you use helium you will have to carry a tank of compressed helium to correct the buoyancy.<b...
by nrdb
Fri Sep 09, 2011 7:55 pm
Forum: Other projects
Topic: File and/or media server
Replies: 75
Views: 20370

Re: File and/or media server

<t>Quote from Lob0426 on August 21, 2011, 20:17<br/> abishur that was the beauty of the original WHS. It used drive extender technology to mount new drives into the DATA drive. It did not care if the drive was SATA, USB or IDE. It used them all in conjunction to create the DATA drive. ........ I wou...
by nrdb
Fri Sep 09, 2011 7:11 pm
Forum: Automation, sensing and robotics
Topic: Cat catcher
Replies: 4
Views: 3472

Re: Cat catcher

Once saw a you tube video where they used computer motion sensor connect to an articulated paint ball gun. There was a guy in front of this thing trying to dodge out of the way, and getting hammered. Fun to watch.
by nrdb
Fri Sep 09, 2011 6:53 pm
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 249511

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced

<t>There is a lot of talk about communication speeds here. I am no expert in PLCs but I did once create a Ethernet computer network system from the ground up, both hardware and software. So here is my 2 cents worth.<br/> <br/> As the ARM processor is running at a low voltage and any GPIO signals won...
by nrdb
Fri Sep 09, 2011 4:40 pm
Forum: Other projects
Topic: Thinking of rolling a distro - 8 bit style!
Replies: 15
Views: 4271

Re: Thinking of rolling a distro - 8 bit style!

<t>I think we need a simple system to teach people starting in computer programming. Like write a program to convert Celsius to Fahrenheit. Not design a Web-Site. You could have a web-site giving tutorials on programming.<br/> <br/> If someone can program in C++ that person will want a full blown OS...
by nrdb
Fri Sep 09, 2011 12:06 am
Forum: Other projects
Topic: Thinking of rolling a distro - 8 bit style!
Replies: 15
Views: 4271

Re: Thinking of rolling a distro - 8 bit style!

<t>I think this would be great.<br/> <br/> What might work good is a simple UI (maybe done in python and GTK+) that has some icons on it to do a small set of specific actions)<br/> <br/> As this is probably going to be used to teach programming, one thing that should probably be done is a module to ...
by nrdb
Thu Sep 08, 2011 2:15 am
Forum: General discussion
Topic: R-Pi as a thin client using LTSP
Replies: 19
Views: 12215

Re: R-Pi as a thin client using LTSP

<r>I have setup a LTSP system, for an office.<br/> You don't have to have the thin clients network boot. That is just so you can remove the HDD from the clients.<br/> The image that is normally networked booted is just to setup the client to ssh login into the server, and set itself up as a remote s...
by nrdb
Fri Jul 29, 2011 7:15 am
Forum: Staffroom, classroom and projects
Topic: Raspberry pi, computer science tool for the masses?
Replies: 31
Views: 8678

Re: Raspberry pi, computer science tool for the masses?

<t>It would be simple to have a SD card with a Linux version that booted straight into a striped down UI with a BASIC or PYTHON interpreter available.<br/> <br/> Another thing that would help is a series of simple expansion cards, that would give general I/O capabilities. Like turn on LEDs, Relays, ...

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