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by exartemarte
Wed Aug 07, 2019 10:13 am
Forum: General discussion
Topic: Pi4 Cooling
Replies: 118
Views: 10435

Re: Pi4 Cooling, fan not powered from GPIO?

Fanshim looks pretty neat. Are the GPIO pins still usable 'above' the n pins used by the fan please? A bit cockeyed, but still usable? It depends on what you mean by "usable". They're certainly accessible - the shim is very thin and is not soldered. You could connect to the pins with a 40-way ribbo...
by exartemarte
Wed Jul 31, 2019 11:20 pm
Forum: General discussion
Topic: Pi4 Cooling
Replies: 118
Views: 10435

Re: Pi4 Cooling

. . . There is however a different way to achieve variable 2-wire brushless motor control using the Pi's PWM pin.. More on this later. Suddenly this thread is getting interesting - I'm looking forward to your next post. (Not that I actually want to control the speed of my fan, but I'd like to know ...
by exartemarte
Thu Jul 25, 2019 11:29 pm
Forum: Raspbian
Topic: Stretch Upgrade
Replies: 5
Views: 292

Re: Stretch Upgrade

Thank you all for the helpful replies, which have served to make good a gap in my knowledge of the way in which the distributions work. Why? And what issues have "we" been warned about? I'm not sure what to make of your use of quotation marks. I have seen posts enquiring about upgrading existing ins...
by exartemarte
Thu Jul 25, 2019 7:07 pm
Forum: Raspbian
Topic: Stretch Upgrade
Replies: 5
Views: 292

Stretch Upgrade

Installing Stretch on a Pi 3B+ I prevented it from updating because I presumed it would try to upgrade to Buster, which wasn't what I wanted and which we have been warned against. Am I right in thinking that is what would have happened? (I'll probably explain in another post why I wanted to use Stre...
by exartemarte
Thu Jul 25, 2019 12:00 pm
Forum: General discussion
Topic: Pi4 Cooling
Replies: 118
Views: 10435

Re: Pi4 Cooling

Re: Fan shim: . . . I have bought one and installed it. It's running and seems to be doing what it says on the tin; somewhat to my surprise, it genuinely is completely silent. It will be interesting to see how it copes with the summer, if we get one. Update: Hottest few days on record, apparently, a...
by exartemarte
Thu Jul 18, 2019 5:40 pm
Forum: General discussion
Topic: Pi4 Cooling
Replies: 118
Views: 10435

Re: Pi4 Cooling

I have a couple of Pi's, including the above-mentioned second desktop, in cases stuck on the back of monitors and it's in one of those that I've put the fan. On robots and other hobby installations I've been known to use a case but mostly I just mount them on pillars. And a couple of Zero's in those...
by exartemarte
Thu Jul 18, 2019 4:23 pm
Forum: General discussion
Topic: Pi4 Cooling
Replies: 118
Views: 10435

Re: Pi4 Cooling

jamesh wrote:
Thu Jul 18, 2019 4:08 pm
.. I use the board with no case, and just the airflow around my desk keeps it to 55 or so at idle ..
You have a tidier desk than mine!
by exartemarte
Thu Jul 18, 2019 10:49 am
Forum: General discussion
Topic: Pi4 Cooling
Replies: 118
Views: 10435

Re: Pi4 Cooling

Thank you for the suggestion. With an electronics background I do have reservations about anything electrical that relies on an interference fit for its connections, as this shim does. Nevertheless, I have bought one and installed it. It's running and seems to be doing what it says on the tin; somew...
by exartemarte
Sun Jul 14, 2019 2:54 pm
Forum: General discussion
Topic: Pi4 Cooling
Replies: 118
Views: 10435

Pi4 Cooling

The over-temperature icon is flickering on and off continuously on the Pi4/4 I'm running as a second desktop, alongside my 'proper' desktop. It's fitted with heatsinks and mounted in a modified old-type official case with both side panels and the top cover left off. On current Buster it's running on...
by exartemarte
Fri Jul 05, 2019 2:52 pm
Forum: Troubleshooting
Topic: LibreOffice Cursor in Buster
Replies: 17
Views: 1715

Re: LibreOffice Cursor in Buster

That works. Thank you, rpdom and Jamesh. (And the bloke who knows . . .)
by exartemarte
Fri Jul 05, 2019 2:32 pm
Forum: Troubleshooting
Topic: LibreOffice Cursor in Buster
Replies: 17
Views: 1715

Re: LibreOffice Cursor in Buster

Thank you, Jamesh. Unfortunately that hasn't worked for me; when I update/upgrade this is what I get: [email protected]:~ $ sudo apt-get update Hit:1 http://raspbian.raspberrypi.org/raspbian buster InRelease Hit:2 http://archive.raspberrypi.org/debian buster InRelease Reading package lists... Done [email protected]...
by exartemarte
Fri Jul 05, 2019 12:40 pm
Forum: Troubleshooting
Topic: LibreOffice Cursor in Buster
Replies: 17
Views: 1715

LibreOffice Cursor in Buster

I'm trying out a Pi4 4 as a second desktop, and so far I'm quite impressed. In LibreOffice Writer, however, no text cursor is visible, which is inconvenient to say the least. If anyone knows how/where to fix this I'd be most grateful. (The Pi is running Raspbian Buster 2019-06-20. I'm typing this in...
by exartemarte
Thu Aug 16, 2018 1:17 pm
Forum: Troubleshooting
Topic: [SOLVED] “mount error(112): Host is down” on stretch, but not jessie! Why?
Replies: 19
Views: 37092

Re: [SOLVED] “mount error(112): Host is down” on stretch, but not jessie! Why?

For the record, this worked for me too. I am accessing networked Pi's (with Samba and various old versions of Raspbian) on the network from a newly set up Pi with current Raspbian Stretch. Fstab entries which had previously worked in Jessie generated the 'Host is down' message in Stretch. To mount a...
by exartemarte
Tue Sep 19, 2017 4:16 pm
Forum: General discussion
Topic: 3.5" Pitft screen settings help
Replies: 6
Views: 1520

Re: 3.5" Pitft screen settings help

CarlRJ wrote:
Sun Apr 23, 2017 7:42 pm
Using them as custom information displays and control panels works fantastically well as it plays to their strengths ...
Quite!

Image
by exartemarte
Sat Dec 31, 2016 5:03 am
Forum: Automation, sensing and robotics
Topic: Recommended DIY Chasis/Kit With Lots of Freedom?
Replies: 6
Views: 2086

Re: Recommended DIY Chasis/Kit With Lots of Freedom?

There are some good chassis and chassis kits out there, but none of them are cheap. Until you have have a little experience and know what you want I would suggest one of two things: 1. Buy the cheapest plastic chassis/motors combination you can find on eBay, or 2. Buy a couple of cheap geared motors...
by exartemarte
Sat Dec 31, 2016 4:07 am
Forum: HATs and other add-ons
Topic: Battery Powered PI
Replies: 7
Views: 1892

Re: Battery Powered PI

Li-Po batteries are potentially dangerous and I would strongly advise against a DIY approach unless you are sure you know what you are doing (in which case you probably wouldn't be asking for advice here). As well as a suitable boost regulator you would need safe wiring, a Li-Po battery charger and ...
by exartemarte
Sat Oct 15, 2016 8:43 pm
Forum: Beginners
Topic: Trouble installing mjpg-streamer
Replies: 5
Views: 5207

Re: Trouble installing mjpg-streamer

Not a direct reply to your question, but I've had quite good results (latency about 2s, frame rate around 10/15fps) using MotionEye with a v1 Pi Cam and a Pi Zero. Link to the software from the Pi Hut's ZeroView page. I've accessed the stream with browsers on Linux and Android - I don't have Windows...
by exartemarte
Tue May 17, 2016 11:22 pm
Forum: General discussion
Topic: A picture from The Pi Hut
Replies: 283
Views: 48278

Re: A picture from The Pi Hut

CarlRJ wrote:...They're limiting purchase quantities while supplies are limited. If they didn't, some folks would buy up tons of them and then you'd be complaining that they weren't available at all...
Or, probably, that they were only available on eBay at a huge mark-up.
by exartemarte
Sat May 14, 2016 2:13 am
Forum: General discussion
Topic: A picture from The Pi Hut
Replies: 283
Views: 48278

Re: A picture from The Pi Hut

asandford wrote:
exartemarte wrote:Of all the possible enhancements a real-time clock would be, to me anyway, the least useful.
Well, if it's not an rtc, perhaps an ADC?
That would be really handy. An obvious use would be monitoring the battery voltage on a mobile robot.
by exartemarte
Sat May 14, 2016 1:34 am
Forum: General discussion
Topic: A picture from The Pi Hut
Replies: 283
Views: 48278

Re: A picture from The Pi Hut

Of all the possible enhancements a real-time clock would be, to me anyway, the least useful.
by exartemarte
Tue May 03, 2016 12:02 am
Forum: Automation, sensing and robotics
Topic: Build a circuit board
Replies: 11
Views: 3290

Re: Build a circuit board

I had a similar construction issue with an Rpi internet radio project. I made up a short ribbon cable with an idc connector at one to connect to the Pi; at the other end I separated out the connectors and soldered them individually to the appropriate points on the circuit board. Unused connectors we...
by exartemarte
Mon Mar 14, 2016 11:48 pm
Forum: Raspbian
Topic: Raspbian won't boot, only blinks cursor in top left corner
Replies: 8
Views: 4238

Re: Raspbian won't boot, only blinks cursor in top left corn

I had something very similar to this. Like so many things Pi-related, it proved to be a power problem. I replaced the cheap-but-convenient angled micro-usb cable with a decent quality charging cable, fed it from a good PSU (5.2v 2.5A) and the problem went away.
by exartemarte
Tue Mar 01, 2016 6:33 pm
Forum: General discussion
Topic: I feel like betrayed
Replies: 126
Views: 14908

Re: I feel like betrayed

When I worked at Nokia all the servers I had to work with were named after famous things that crashed, Titanic, Hindenburg, Gripen, Concordski and so on. I call that tempting providence! We've just called a couple of machines we found in a skip May and Hammond. We avoided Clarkson, in case it got u...
by exartemarte
Tue Mar 01, 2016 3:24 am
Forum: General discussion
Topic: I feel like betrayed
Replies: 126
Views: 14908

Re: I feel like betrayed

Many years ago--mid- to late-1980s?--I saw a list of unix systems on the UC Berkeley campus. It was single spaced in two columns and ran 30 pages. Ye Gods! If I had that sort of naming problem I think I'd just give them all numbers! Those were the days, though: I remember UCB releases, UCSD Pascal ...
by exartemarte
Tue Mar 01, 2016 2:49 am
Forum: General discussion
Topic: I feel like betrayed
Replies: 126
Views: 14908

Re: I feel like betrayed

Valcrist wrote:Just food for thought: when we bought the Pi2, we bought the Pi2 - that's it. We didn't buy the Pi2 plus a promise that there won't be a new Pi for the next few months.
Quite so. As it happens I bought a Pi2 a few weeks ago, too. It's still a Pi2.

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