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by NormanDunbar
Tue Aug 28, 2012 8:16 am
Forum: Troubleshooting
Topic: Don't but this USB hub
Replies: 25
Views: 9375

Re: Don't but this USB hub

Then of course there is the power supply, your mileage will vary as to whether you got a decent 2amp psu or a fire hazard. Morning Reggie. Even a 2 A PSU is underpowered for a 7 port USB hub. There should be, according to the USB 2.0 Standard, 500 mA on each port - so a minimum of 3.5 A would be re...
by NormanDunbar
Sat Aug 25, 2012 11:51 am
Forum: Troubleshooting
Topic: Don't but this USB hub
Replies: 25
Views: 9375

Re: Don't but this USB hub

2000mA PSU's which is not enough to power all @500mA obviously, but easily enough to power the RPi' and a HD + keyboard + mouse This is true, but yours are twice as powerful as mine. I've only got 1000 mA. Never mind, took it back this morning for a complete refund. The man asked why, so I told him...
by NormanDunbar
Fri Aug 24, 2012 3:31 pm
Forum: Troubleshooting
Topic: Don't but this USB hub
Replies: 25
Views: 9375

Re: Don't buy this USB hub

I think you have adequate grounds for demanding a refund of your return postage. You may be correct, however, it wasn't advertised as being compatible with the Pi, and the company I bought it from, like Farnells, probably don't have time or skills to test everything that all their products claim to...
by NormanDunbar
Fri Aug 24, 2012 2:58 pm
Forum: Troubleshooting
Topic: Don't but this USB hub
Replies: 25
Views: 9375

Re: Don't but this USB hub

I have 4 - and they all work with my RPi's though I know other people who cannot get them to work Interesting. What power rating is the power supply then? Maybe you got lucky and have one with enough power to work. Bus 001 Device 004: ID 05e3:0610 Genesys Logic, Inc. 4-port hub Bus 001 Device 005: ...
by NormanDunbar
Fri Aug 24, 2012 2:21 pm
Forum: Troubleshooting
Topic: Don't but this USB hub
Replies: 25
Views: 9375

Re: Don't buy this USB hub

Hi Jim,

I did think of opening it up and fitting a diode to prevent the power back feed from the interconnect cable, but then I figured, it's so small it's most likely a PCB mounted USB socket and anyway, the other problems with it render it useless anyway, so why bother. It's going back.

Cheers.
by NormanDunbar
Fri Aug 24, 2012 1:51 pm
Forum: Troubleshooting
Topic: Don't but this USB hub
Replies: 25
Views: 9375

Don't but this USB hub

Greetings. I purchased a Dynamode USB Hub for use with my Pi. It's a 7 port self powered HUB. The hub is the same as those being sold at Farnells as being compatible with the Pi. (http://uk.farnell.com/dynamode/usb-h70-1a2-0/hub-usb-2-0-7-port-with-ac-adaptor/dp/2115058 is the URL for the hub). The ...
by NormanDunbar
Wed Aug 15, 2012 2:41 pm
Forum: Raspbian
Topic: Auto detection of HDMI (and eth) post boot?
Replies: 15
Views: 12166

Re: Auto detection of HDMI (and eth) post boot?

Factoid, Dom,

thanks.

Cheers,
Norm.
by NormanDunbar
Wed Aug 15, 2012 2:20 pm
Forum: Raspbian
Topic: Auto detection of HDMI (and eth) post boot?
Replies: 15
Views: 12166

Re: Auto detection of HDMI (and eth) post boot?

I wouldn't trust anything that Element14 writes. They have a habit of scraping unverified crap from wikis and then publishing it as fact. I'm an old git, ;) , and I started computing with a ZX-81. Nothing on that was hot-plug! It was a sure fire way to trash the computer. I also remember the first ...
by NormanDunbar
Wed Aug 15, 2012 2:03 pm
Forum: Raspbian
Topic: Auto detection of HDMI (and eth) post boot?
Replies: 15
Views: 12166

Re: Auto detection of HDMI (and eth) post boot?

It'd be helpful if you could link to where you heard that. That doesn't make any sense to me, since HDMI is an inherently hot pluggable device. The config.txt file even has options for hdmi_force_hotplug and hdmi_ignore_hotplug. No problem, Element 14's Quick Start Guide is one place I read it. I a...
by NormanDunbar
Wed Aug 15, 2012 11:27 am
Forum: General discussion
Topic: Gertboard is here!
Replies: 67
Views: 10482

Re: Gertboard is here!

I think you missed the point of my sig! ;) On purpose. Sorry In which case, I must apologise for my own sense of humour failure. Sorry. Thankfully, I am not employed as a comedian! On the subject of lead/tin/copper mining in (Roman?) Britain, this is interesting: https://en.wikipedia.org/wiki/Minin...
by NormanDunbar
Tue Aug 14, 2012 11:46 am
Forum: General discussion
Topic: Gertboard is here!
Replies: 67
Views: 10482

Re: Gertboard is here!

And just so you know, plumbing comes from the Latin for lead, of which the Romans used a lot, much of which came from Cornwall, which is one reason why they invaded Britain. I may be wrong, but isn't Cornwall famous for Tin, not Lead? Here in Yorkshire - where I'm currently in exile - we have a few...
by NormanDunbar
Mon Aug 13, 2012 11:01 am
Forum: Raspbian
Topic: Auto detection of HDMI (and eth) post boot?
Replies: 15
Views: 12166

Re: Auto detection of HDMI (and eth) post boot?

Just a thought. I'm pretty sure I read somewhere that the HDMI is not hot-pluggable and plugging in or removing the cable, after boot and with power on, can render the Pi deader than a dead thing. Apparently only the Audio 3.5mm output, the USB and the Network are hot-plug, the HDMI isn't.I've no id...
by NormanDunbar
Sat Aug 11, 2012 3:52 pm
Forum: General discussion
Topic: Gertboard is here!
Replies: 67
Views: 10482

Re: Gertboard is here!

... and Liz saying "That's baffling. I *know* they have plenty in the warehouses already". So it's not all that clear to me. You might find that Liz mentioned having lots of **boards** in stock. They, Farnells, could be having problems sourcing enough of the correct quality components to make up th...
by NormanDunbar
Wed Aug 08, 2012 8:44 am
Forum: Troubleshooting
Topic: Running Headless and Sound
Replies: 11
Views: 3044

Re: Running Headless and Sound

Ok, now this is getting weird! My config.txt looks like this: hdmi_force_hotplug=1 disable_overscan=1 And that allows me to run headless or with a full screen on HDMI and all nice fonts etc. Just what I was after. I switched out my Rasbian distro to try out the Fedora 17 Respin, it's pretty slow, bu...
by NormanDunbar
Tue Aug 07, 2012 6:59 am
Forum: Troubleshooting
Topic: Running Headless and Sound
Replies: 11
Views: 3044

Re: Running Headless and Sound

Morning OBCD. Thanks again for testing this stuff out for me. Appreciate it. I've tested myself: Direct to switch, 100M lit up on switch, 10M lit up on Pi. Via Homeplug (85M max) 10M lit on switch, 10M lit on Pi. Oh well - that's consistent then! Suspect Netgear switch may be lying to me! I don't ha...
by NormanDunbar
Mon Aug 06, 2012 7:00 pm
Forum: Troubleshooting
Topic: Running Headless and Sound
Replies: 11
Views: 3044

Re: Running Headless and Sound

Sorry, that should have been:

All responses have been gratefully received - thanks.

Can't spell, can't type! :-(

Cheers,
Norm.
by NormanDunbar
Mon Aug 06, 2012 6:35 pm
Forum: Troubleshooting
Topic: Running Headless and Sound
Replies: 11
Views: 3044

Re: Running Headless and Sound

Thanks to all who replied. With hdms_safe=1 I can boot without an HDMI monitor attached. Hooray! Unfortunately, with one attached, the display is severely squashed with huge margins on all 4 sides. Not to worry elinux.org has the details of what other settings hdmi_safe actually sets, so I can remov...
by NormanDunbar
Mon Aug 06, 2012 1:39 pm
Forum: Troubleshooting
Topic: Running Headless and Sound
Replies: 11
Views: 3044

Re: Running Headless and Sound

Thanks for replying OBCD, I don't with to infer that you are incorrect, but I have run my Pi with one of those Ethernet over the power supply type things and the light is lit for that as well. I know that that device only get 80 M maximum, so I'm not 100% convinced of your explanation - sorry. Addin...
by NormanDunbar
Mon Aug 06, 2012 12:17 pm
Forum: Troubleshooting
Topic: Running Headless and Sound
Replies: 11
Views: 3044

Running Headless and Sound

I've got my Pi running Raspbian. I'm attempting to run it headless as I have found that VNC over my network is quite adequate as far as responses etc go. However, I have found that unless I plug an HDMi monitor in I get nothing on startup except the red power on LED lighting up. Also, regardless of ...
by NormanDunbar
Fri Dec 16, 2011 8:09 am
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 159039

Re: BASIC - more harmful than useful?

<r>Quote from DavidS on December 15, 2011, 21:22<br/> The most productive coders are those that do it correctly. They may not produce as much product, though they do produce the most usable product.<br/> A sorry tale from my fairly recent past. A company I worked in was looking to make redundancies ...
by NormanDunbar
Wed Dec 14, 2011 4:15 pm
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 159039

Re: BASIC - more harmful than useful?

Quote from adric22 on December 14, 2011, 14:53
That is what the Pi needs.. something that runs full screen that is easy to learn within a few minutes.
Agreed!

Cheers,
Norm.
by NormanDunbar
Wed Dec 14, 2011 12:33 pm
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 159039

Re: BASIC - more harmful than useful?

<r>Morning all,<br/> <br/> people are too quick to trash Basic, or indeed, to give it both barrels behind the shed - a touch hasty methinks.<br/> <br/> While it is true that basic doesn't have linked lists, or records or other structures, neither does C as someone else back up this thread pointed ou...
by NormanDunbar
Mon Dec 12, 2011 4:18 pm
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 159039

Re: BASIC - more harmful than useful?

<r>Quote from tomo on December 12, 2011, 16:12<br/> ... But I still wonder what's the aim of raspberry pi and using it for teaching? What's the goal? Is it to produce skilled windows programmers by the end of the course (I guess no)?<br/> I believe that the aim is to produce skilled programmers whic...
by NormanDunbar
Mon Dec 12, 2011 3:33 pm
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 159039

Re: BASIC - more harmful than useful?

<r>Quote from obarthelemy on December 12, 2011, 14:43<br/> ...Computing has moved on, it's time us old geeks caught up ^^<br/> Yeah right! <E>;)</E> I'm an old geek too, and I can do COBOL still, as well as C++. Mind you, I'm probably better at COBOL!<br/> <br/> Computing may have moved on, but ther...
by NormanDunbar
Sun Dec 11, 2011 4:58 pm
Forum: Staffroom, classroom and projects
Topic: BASIC - more harmful than useful?
Replies: 899
Views: 159039

Re: BASIC - more harmful than useful?

<r>Quote from spock on December 11, 2011, 16:54<br/> what basic would you use on a raspberry pi anyway?<br/> <br/> Good question. If nothing "floats your boat" why not define a list of what would, and write an OpenSource Basic that meets them exactly - how hard can it be? I'd use ANTLR (<URL url="ht...

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