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by doughadfield
Wed Dec 28, 2016 8:10 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: STICKY: X86 Debian Jessie with PIXEL desktop for PC and Mac (obsolete)
Replies: 231
Views: 128062

Re: RASPBIAN WITH PIXEL DESKTOP FOR PC AND MAC

This is BRILLIANT!!! - I have a low-profile USB stick now permanently inserted in my HP Elitebook 8440p and I'm now fully converted to using Linux as my standard "home" desktop. I've tried other Linux desktops (Mint, etc) but they're too cumbersome. Pixel is really lightweight as well as being raspb...
by doughadfield
Tue Sep 27, 2016 12:35 pm
Forum: Raspbian
Topic: Howto: jessie, RTC, hwclock
Replies: 6
Views: 21323

Re: Howto: jessie, RTC, hwclock

Hi, with the latest Jessie, it's now even simpler to get rtc working. I've posted a description on the forum, but in a nutshell, you only need to make two edits to a standard Jessie raspbian or raspbian lite: 1. add the "dtoverlay=i2c-rtc,<chipset>" line in the /boot/config.txt file, as per your des...
by doughadfield
Tue Sep 27, 2016 10:16 am
Forum: General discussion
Topic: pi pen drive media server
Replies: 2
Views: 568

Re: pi pen drive media server

Which Pi do you have? (does it have two USB ports, or 4?) The early Pis (Model B, with two USB ports) had power limiting on the board, such that the power to external USB devices was limited. On the later Pis (Model B+, 2, 3) the on-board power availability is greater. However, notwithstanding the a...
by doughadfield
Tue Sep 27, 2016 7:47 am
Forum: General discussion
Topic: camera v2
Replies: 6
Views: 2451

Re: camera v2

I have several RPi cameras of various pedigrees, including NOIR, regular 1.3, new 2.1 and even a couple of the chinese knock-offs. With all (but one) of them, I've unscrewed the original lens and fitted a 12mm lens mount (designed for security cameras). This allows the fitting of a huge variety of l...
by doughadfield
Tue Sep 27, 2016 7:32 am
Forum: General discussion
Topic: Install DS3231 Real Time Clock - Latest Info
Replies: 69
Views: 50448

Re: Install DS3231 Real Time Clock - Latest Info

I'm presuming that the shape and construction of the module would be irrelevant to it's operation, if it's using the same chip (DS3231). So the above instructions should work regardless of the origin of the device itself. Let us know if your experience is different (with a picture if possible) as it...
by doughadfield
Tue Sep 27, 2016 7:23 am
Forum: General discussion
Topic: Running windows on Raspberry Pi 3
Replies: 13
Views: 3230

Re: Running windows on Raspberry Pi 3

Get another printer ;-) ...I'm only half joking - the opportunity for learning and personal development afforded by working with a different operating system (linux) is really not to be missed. for the sake of a printer, which you could probably replace for the cost of a couple of sets of ink cartri...
by doughadfield
Mon Sep 26, 2016 11:05 pm
Forum: General discussion
Topic: Have experience with Raspberry Pi? Interested in IoT?
Replies: 23
Views: 4186

Re: Have experience with Raspberry Pi? Interested in IoT?

Hi, I'm intrigued by your approach and think that exchanging gift vouchers for input from the pi community is a really good idea - cheaper than any other marketing focus-group based approach that I've had any experience with. For myself, I'm an IT professional as a day job, but enjoy playing with Pi...
by doughadfield
Mon Sep 26, 2016 10:38 pm
Forum: General discussion
Topic: Install DS3231 Real Time Clock - Latest Info
Replies: 69
Views: 50448

Re: Install DS3231 Real Time Clock - Latest Info

Following on from the above, here's a picture of the modules I used (the connector simply plugs onto the first 5 pins of the pi) - here are some useful hwclock commands to test and play. They all need to be run as the root user, so precede with "sudo" if you're not running as root: read time directl...
by doughadfield
Mon Sep 26, 2016 10:29 pm
Forum: General discussion
Topic: Install DS3231 Real Time Clock - Latest Info
Replies: 69
Views: 50448

Install DS3231 Real Time Clock - Latest Info

Hi All, I just received a couple of these very cheap, neat DS3231 based real time clock modules from China (ebay specials) and have spent a good while getting them configured with the latest (mid-2016) Jessie based Raspbian. The current info on the internet is mostly out of date, so by piecing toget...
by doughadfield
Mon Sep 26, 2016 1:23 am
Forum: General discussion
Topic: Basic UPS for the Pi
Replies: 18
Views: 3097

Re: Basic UPS for the Pi

Wow, you're getting really scientific with this! My reactions: 1. I really like the PSU module you've found on Amazon - I'm going to order myself one (or two ;-) 2. What software do you use to produce your circuit diagrams? (or are they hand-drawn) - they look really good 3. Measuring current to/fro...
by doughadfield
Mon Sep 19, 2016 7:52 am
Forum: General discussion
Topic: Powerup/down from 2 12V sources
Replies: 11
Views: 1613

Re: Powerup/down from 2 12V sources

Yes this could work (having both switched (ignition) and non-switched (battery) supplies feeding the pi. However there are distros out there which use read-only file systems for the O/S and in-memory file systems to maintain non-persistent changes. These are designed for simple power-on/power-off (l...
by doughadfield
Mon Sep 19, 2016 7:38 am
Forum: General discussion
Topic: Basic UPS for the Pi
Replies: 18
Views: 3097

Re: Basic UPS for the Pi

Raspberry Pi is all about experimenting, discovery and learning, so it sounds like you're right in the centre of the intended outcome here! ...and yes, dad's can be sneaky (being one myself :-). I've not bothered with low voltage cutoff, as my UPSs are for entirely practical uses - I have three in "...
by doughadfield
Sun Sep 18, 2016 7:45 pm
Forum: General discussion
Topic: Basic UPS for the Pi
Replies: 18
Views: 3097

Re: Basic UPS for the Pi

Addendum to my previous reply - 15V regulated switch mode power supplies are easy to get hold of, as they are used by several laptop models. Toshiba being one. So get a couple of cheap clone toshiba power supplies off ebay - they seem to work perfectly for me.
by doughadfield
Sun Sep 18, 2016 7:40 pm
Forum: General discussion
Topic: Basic UPS for the Pi
Replies: 18
Views: 3097

Re: Basic UPS for the Pi

Hi, I've used basically an identical circuit to provide UPS for my home Pis (including ethernet switches and router). Couple of things I learned in development: 1. the mains power supply needs to be regulated at 15V. 2. The current limit resistor in the charging circuit should be 1.5ohms (2W or abov...
by doughadfield
Sun Sep 18, 2016 6:29 pm
Forum: General discussion
Topic: Pi as home router (with FTTP)
Replies: 6
Views: 3036

Re: Pi as home router (with FTTP)

All, after reading all your wise and helpful posts, I've had a brief attack of sanity and decided to use a purpose-built router - in fact, I remembered I had an old netgear WNR3500 knocking about, so I dug it out and lo and behold, it fired up first time on the BT fibre line and has all the features...
by doughadfield
Sat Sep 17, 2016 7:27 pm
Forum: General discussion
Topic: Pi as home router (with FTTP)
Replies: 6
Views: 3036

Re: Pi as home router (with FTTP)

Thanks both, for your quick and full replies. Let me address your points below: Performance: I take your point about the I/O bottleneck in the Pi - I have a Pi acting as a NAS and am intimately aware of the I/O limitations :-) - however my internet connection is 40Mbits/sec down and 10Mbits/sec up, ...
by doughadfield
Sat Sep 17, 2016 5:06 pm
Forum: General discussion
Topic: Pi as home router (with FTTP)
Replies: 6
Views: 3036

Pi as home router (with FTTP)

Hi All, I'm embarking on a project to replace my BT home hub with a Pi! this is a dangerous undertaking for the obvious reason of security. Home routers are designed with firewalling (if that's even a word!!) built in and turned on by default. They are set to outgoing connections only, with (in most...
by doughadfield
Sat Sep 17, 2016 4:48 pm
Forum: General discussion
Topic: raspbian repositories down
Replies: 17
Views: 2098

Re: raspbian repositories down

Of course I agree with you! (I had tongue firmly in cheek ;-) - I've been working with large-scale Unix systems for decades, and one of the mantra's was zero downtime - running "uptime" on my main house pi shows it's been up for nearly a year! :-)

thanks again for your help

Doug
by doughadfield
Sat Sep 17, 2016 3:04 pm
Forum: General discussion
Topic: raspbian repositories down
Replies: 17
Views: 2098

Re: raspbian repositories down

OK folks, so I've just re-booted my (BT Home Hub 5) router and voila!! all is now working - all pis are accessing all repositories as normal! So firstly, sorry to have troubled the great folks on this forum secondly, thank you so much to those who immediately jumped in to help me thirdly, note to se...
by doughadfield
Sat Sep 17, 2016 2:26 pm
Forum: General discussion
Topic: raspbian repositories down
Replies: 17
Views: 2098

Re: raspbian repositories down

as for firewall or proxy, i'm a "normal" household network behind a BT home hub, with no other proxies or network routing in place. I have quite a few devices on my home network (including a Pi cluster, pi server, a few X64 linux and windows machines, but all on a flat network behind the single home...
by doughadfield
Sat Sep 17, 2016 2:21 pm
Forum: General discussion
Topic: raspbian repositories down
Replies: 17
Views: 2098

Re: raspbian repositories down

just tried pinging archive.raspberrypi.org from one of the offending pis - all fine, as can be seen below: [email protected] ~ $ ping archive.raspberrypi.org PING lb.raspberrypi.org (93.93.130.214) 56(84) bytes of data. 64 bytes from 93.93.130.214: icmp_seq=1 ttl=56 time=15.1 ms 64 bytes from 93.93.130.21...
by doughadfield
Sat Sep 17, 2016 2:15 pm
Forum: General discussion
Topic: raspbian repositories down
Replies: 17
Views: 2098

Re: raspbian repositories down

just tried browsing to archive.raspberrypi.org from this (windows 10) laptop, and all is peachy - immediate response, no delays, correct directories being presented, etc. Also, I've now tested 3 pis and one works fine - just the two recently updated ones that are struggling (one is raspbian lite, on...
by doughadfield
Sat Sep 17, 2016 2:12 pm
Forum: General discussion
Topic: raspbian repositories down
Replies: 17
Views: 2098

Re: raspbian repositories down

interestingly, of the 3 Pis on my home network that I've just tried, two show the problem and one completed the apt-get update just fine. The difference is the two that show the problem were recently "apt-get upgrade"d - within the last 48 hours, whereas the "working" one hasn't been upgraded for a ...
by doughadfield
Sat Sep 17, 2016 2:04 pm
Forum: General discussion
Topic: raspbian repositories down
Replies: 17
Views: 2098

Re: raspbian repositories down

...and to reply to B.Goode, I don't think anything has changed in the last 24 hours (although I did reboot my home hub yesterday). But all other linux repositories seem to be behaving perfectly, including the 3rd party ones on the affected pis.... All other web services to the house seem to be worki...
by doughadfield
Sat Sep 17, 2016 2:01 pm
Forum: General discussion
Topic: raspbian repositories down
Replies: 17
Views: 2098

Re: raspbian repositories down

Here you go... does the below look right? traceroute to 93.93.128.230 (93.93.128.230), 30 hops max, 60 byte packets 1 router.doughadfield.net (10.0.0.1) 1.353 ms 1.363 ms 1.213 ms 2 * * * 3 * * * 4 31.55.187.180 (31.55.187.180) 9.608 ms 9.825 ms 9.896 ms 5 core2-hu0-19-0-1.southbank.ukcore.bt.net (1...

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