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by gtoal
Thu Feb 08, 2018 5:53 pm
Forum: General programming discussion
Topic: British-made programming language
Replies: 54
Views: 15328

Re: British-made programming language

Paul Webster, Wow, it's a long time since I heard anything from a former Coral-66 programmer. I did a couple of years of Coral 66 back in the early 1980's. For Marconi Radar. Yes, Coral was similar enough to Algol to be picked up quickly. I had never heard of it before starting at Marconi Radar. Th...
by gtoal
Tue Feb 06, 2018 7:43 pm
Forum: General programming discussion
Topic: British-made programming language
Replies: 54
Views: 15328

Re: British-made programming language

Well, I was reading through this thread and thinking I'ld like to add some info, but had decided not to when I saw the 2012 date - but since some brave soul has already resurrected it... here goes... You've got the main ones. Pleased to see that Gordon mentioned Imp - though to clarify the primary l...
by gtoal
Mon Sep 11, 2017 7:48 am
Forum: General discussion
Topic: Be careful with Pi Zero and CSI slot
Replies: 40
Views: 13682

Re: Be careful with Pi Zero and CSI slot

I now have broken CSI clamps on 3 of 6 pi zeros. After the first one I was extra careful but it still happened. I consider it a design flaw. I've used extremely sticky tape to hold one in place over the broken connector but the depth of insertion is so shallow that even a little amount of give to th...
by gtoal
Sun Aug 06, 2017 11:37 pm
Forum: General discussion
Topic: keeping the temp low without fans?
Replies: 14
Views: 3013

Re: keeping the temp low without fans?

OutoftheBOTS wrote:
Sun Aug 06, 2017 9:42 pm
cut a little hole in the hat for a heat sink to stick out. The bottom line is that you have the let the heat escape so that it doesn't build up
I think I've solved the fan problem :-) (That probably *would* pass as normal in this part of the world :-/ )
by gtoal
Sun Aug 06, 2017 11:33 pm
Forum: General discussion
Topic: keeping the temp low without fans?
Replies: 14
Views: 3013

Re: keeping the temp low without fans?

How are you protecting the Pi from ESD? I just lost a new Pi0W to static (as far as the forum can conclude) Interesting, had not seen those threads. I just bought my second Pi Zero W a week or so back, and after working once, the wifi stopped working permanently. I didn't handle it roughly at all b...
by gtoal
Sun Aug 06, 2017 9:33 pm
Forum: General discussion
Topic: keeping the temp low without fans?
Replies: 14
Views: 3013

Re: keeping the temp low without fans?

Thanks for all your comments and suggestions. I'll look into seeing if it's possible to turn off the speed governor as suggested and lock it down at the lowest speed, and see how much difference that makes. Heatsinks etc aren't a option - there is literally no room for *anything* extra, and sticking...
by gtoal
Sun Aug 06, 2017 5:51 am
Forum: General discussion
Topic: keeping the temp low without fans?
Replies: 14
Views: 3013

keeping the temp low without fans?

I've just built a hat for a pi zero w. No, I don't mean an add-on card, I mean the thing you stick on your head :-) It contains a hidden picam that want to continuously record my day with, plus do anything else I might want an on-head personal assistant to do :-) The trouble is, the pi is right next...
by gtoal
Sat Jul 22, 2017 10:13 pm
Forum: AIY Projects
Topic: Google Assistant does not play music and some other commands
Replies: 14
Views: 26094

Re: Google Assistant does not play music and some other comm

As far as I can tell, the inability to play music appears to be a side-effect of not being able to select the raspberry-pi-based assistant device in the Google Home app. Which means it is impossible to set the default music source for the device - even though I suspect it could play the music if onl...
by gtoal
Thu Jul 13, 2017 1:42 pm
Forum: Raspbian
Topic: dpkg returned an error code (1)
Replies: 5
Views: 5348

Re: dpkg returned an error code (1)

Solved! [email protected]:~/src/listener-2.2 08:36 $ dpkg --get-selections|fgrep ffm ffmpeg install [email protected]:~/src/listener-2.2 08:36 $ sudo dpkg --remove ffmpeg (Reading database ... 124393 files and directories currently installed.) Removing ffmpeg (3.1.1-1) ... dpkg: warning: while removing ffmpeg, di...
by gtoal
Thu Jul 13, 2017 4:43 am
Forum: Raspbian
Topic: dpkg returned an error code (1)
Replies: 5
Views: 5348

Re: dpkg returned an error code (1)

Same here, while trying to install Google Assistant as per https://developers.google.com/assistant/sdk/prototype/getting-started-pi-python/run-sample I tried removing ffmpeg by these commands but neither worked: sudo apt-get remove ffmpeg sudo apt-get remove --purge ffmpeg I also tried temporarily r...
by gtoal
Wed Jul 05, 2017 5:24 pm
Forum: Troubleshooting
Topic: can't install munin - error processing archive /var/cache/ap
Replies: 2
Views: 704

Re: can't install munin - error processing archive /var/cach

Try sudo rm /var/cache/apt/archives/libsigsegv2_2.10-4_armhf.deb Thanks - that's doing the trick! I have to confess most of my unix experience is from the days when you had to fetch a tar file and build stuff yourself from source. I don't really have much experience of these new-fangled package man...
by gtoal
Wed Jul 05, 2017 5:04 pm
Forum: Troubleshooting
Topic: can't install munin - error processing archive /var/cache/ap
Replies: 2
Views: 704

can't install munin - error processing archive /var/cache/ap

did an apt-get update first... apt-get install munin causes this error: 0 upgraded, 45 newly installed, 0 to remove and 319 not upgraded. Need to get 0 B/5,338 kB of archives. After this operation, 24.0 MB of additional disk space will be used. Do you want to continue? [Y/n] Extracting templates fro...
by gtoal
Tue Jun 27, 2017 1:11 am
Forum: Troubleshooting
Topic: Reliable USB ethernet for Raspberry PI
Replies: 5
Views: 1386

Re: Reliable USB ethernet for Raspberry PI

https://www.raspberrypi.org/forums/viewtopic.php?f=45&t=186555 Thanks - wish I had seen this before ordering that adapter with some random unknown chipset! :-) I've now also ordered one of these cheap ones from eBay ($3.85): http://www.ebay.com/itm/282328781990 and a slightly more expensive one on ...
by gtoal
Mon Jun 26, 2017 2:08 am
Forum: Troubleshooting
Topic: Reliable USB ethernet for Raspberry PI
Replies: 5
Views: 1386

Re: Reliable USB ethernet for Raspberry PI

I've used this on Model A+'s http://www.banggood.com/USB3_0-Gigabit-Ethernet-Adapter-RJ45-Network-Card-101001000Mbps-p-959605.html if you use a micro to normal shim you can use it on a PI0 I have about 20 pi's online at home. Two of them crash every few days with a kernel "Oops". It's the same two ...
by gtoal
Tue Jun 20, 2017 3:46 pm
Forum: HATs and other add-ons
Topic: RPi + PS3Eye getting Sound-microphone
Replies: 20
Views: 21902

Re: PS3 Eye works again!

Happy to report that if you do sudo apt-get update && sudo apt-get upgrade as of today on your RPi running Raspbian 8.0 (jessie), and then reboot you will get kernel 4.9.24-v7+ #993 SMP Wed Apr 26 18:01:23 BST 2017 and this DOES WORK with the PS3 Eye audio, both with Audacity and a simple command l...
by gtoal
Sat Jun 03, 2017 4:51 pm
Forum: Camera board
Topic: motion: grey segments in avi (unable to open video device)
Replies: 0
Views: 792

motion: grey segments in avi (unable to open video device)

I've installed motion and it seems to work - it captures single frames OK when it detects motion, and I can watch the camera via web streaming just fine, but the saved avi files look like this: http://gtoal.com/motion/53-20170603082020.avi - a few frames are present but interspersed with grey frames...
by gtoal
Wed Mar 29, 2017 6:04 pm
Forum: General discussion
Topic: Unable to Install using apt-get
Replies: 42
Views: 144076

Re: Unable to Install using apt-get

I've been getting this problem off and on, and usually apt-get update fixes it, but recently I've had some packages that just will not install, so I finally got out the trusty sniffer and looked into it closely to find the underlying problem. After redirection by mirrordirector.raspbian.org, my requ...
by gtoal
Wed Mar 29, 2017 5:53 am
Forum: Graphics, sound and multimedia
Topic: How to use my Pi as contributor for Broadcastify.com
Replies: 3
Views: 1493

Re: How to use my Pi as contributor for Broadcastify.com

fruitoftheloom wrote:
some_evil wrote:And another question, is the pi capable of using a stereo 3.5mm audio jack as a line in (mic)???
The Raspberry Pi has no Audio Input built in, you need to use a USB Sound card or a GPIO AUdio HAT Card ;)
He could use an SDR to receive the audio from radio and also do frequency scanning too...
by gtoal
Wed Mar 29, 2017 5:12 am
Forum: Graphics, sound and multimedia
Topic: realtime audio FFT
Replies: 4
Views: 4775

realtime audio FFT

I've just discovered the 2014 post about GPU_FFT and the demo code in /opt/vc. Better late than never I guess :-) Our beehive monitoring project could usefully use this to analyse audio from the beehive and log the data in realtime as we do for other sensors in the hive such as temperature and humid...
by gtoal
Sat Mar 18, 2017 5:47 pm
Forum: Automation, sensing and robotics
Topic: Bee hive control and observation
Replies: 9
Views: 8566

Re: Bee hive control and observation

Wii Fit boards are now around $25 (or $15 occasionally if you can find a good sale on) and they'll work great for this project. We're in the process of adding one to our "Electric Hive" project. They do have a problem with requiring a bluetooth sync every time you power it up but that can be easily ...
by gtoal
Fri Mar 10, 2017 11:34 pm
Forum: Camera board
Topic: STICKY: Volunteers to assist with project: Honey Bee Counter
Replies: 57
Views: 45227

Re: Volunteers to assist with this project: Honey Bee Counte

Dr DongChul Kim, a new member of our team, is making some progress on using a neural net to classify bee videos: https://www.youtube.com/watch?v=xF09bFD7sS4 - still early days, but I thought you might be interested in seeing the work progress.
by gtoal
Fri Mar 10, 2017 8:00 am
Forum: Automation, sensing and robotics
Topic: want to use soft pwm with gpio command
Replies: 11
Views: 7741

Re: want to use soft pwm with gpio command

Unless something has changed the gpio utility will only generate hardware PWM (i.e. Broadcom GPIO 12/13/18/19). You need a daemon (such as pigpio) to generate software PWM. Ah! Finally someone who knows. Thanks, Joan. I could have sworn I had read somewhere that it did software PWM, but this explai...
by gtoal
Fri Mar 10, 2017 7:07 am
Forum: Automation, sensing and robotics
Topic: want to use soft pwm with gpio command
Replies: 11
Views: 7741

Re: want to use soft pwm with gpio command

To use the gio utility on the command line for PWM I think you have to do this: gpio mode 1 pwm gpio pwm 1 512 gpio -g pwm 18 51 That should set an LED on WiringPi pin 1 (Physical pin 12, BCM pin 18) to 50% brightness then to 5% -g means use BCM numbering. If you set the mode to output you don't ge...
by gtoal
Thu Mar 09, 2017 8:40 pm
Forum: Automation, sensing and robotics
Topic: want to use soft pwm with gpio command
Replies: 11
Views: 7741

Re: want to use soft pwm with gpio command

>I presume there is always some daemon process running in the background to drive the pins? It seems to me that presumption is wrong. pigpio is described here . I suggest you convert your python programs to use it instead of rpi.gpio, for it (as you noticed) has the daemon you require. In my experi...
by gtoal
Thu Mar 09, 2017 4:43 pm
Forum: Automation, sensing and robotics
Topic: Powering raspberry pi by voltage regulator
Replies: 11
Views: 6306

Re: Powering raspberry pi by voltage regulator

I've been powering a pi from a 2S lipo for a couple of years with no problems - using a UBEC buck converter. See this project: https://www.instructables.com/id/Retro-Pi-Cam/ regulator is similar to https://www.adafruit.com/product/1385 or https://www.aliexpress.com/item/Hot-1pc-BEC-UBEC-3A-5V-Brushl...

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