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by SteveDee
Sun Mar 01, 2015 8:03 am
Forum: General discussion
Topic: Power/Voltage Issues on B+
Replies: 31
Views: 4572

Re: pRi 2 and camera board - how much power?

...vcgencmd measure_volts sums volts to 4.8250 V. I don't think this is helpful. The rainbow square indicates that the 5V supply has dropped below about 4.65V, which does not equate to the sum of these readings. (see Dom's post: http://www.raspberrypi.org/forums/viewtopic.php?f=29&t=82373) I...Shou...
by SteveDee
Sat Feb 28, 2015 10:48 pm
Forum: Automation, sensing and robotics
Topic: do i have to use pin 4 with a 18B20
Replies: 6
Views: 1431

Re: do i have to use pin 4 with a 18B20

evilkitty wrote:...can i use any of the green pins in this image...
You can change the designated pin by editing /boot/cmdline.txt (see my notes: http://captainbodgit.blogspot.co.uk/201 ... ensor.html)
by SteveDee
Fri Feb 27, 2015 2:59 pm
Forum: Automation, sensing and robotics
Topic: HOW-TO Build an Automatic Power Supply for the Pi
Replies: 39
Views: 37744

Re: HOW-TO Build an Automatic Power Supply for the Pi

Good quality information once again Paul. Many thanks.

I just wonder if this is too good for this forum (as a post, I mean). It should be in a Pi wiki, or maybe published in MagPi.
by SteveDee
Fri Feb 27, 2015 11:25 am
Forum: Troubleshooting
Topic: pi and usb Cameras
Replies: 5
Views: 1991

Re: pi and usb Cameras

You need to look here for information on the config options: http://www.lavrsen.dk/foswiki/bin/view/Motion/WebHome As far as I know (and I may be out of date on this) you may not be able to get more than one USB camera running on a Linux machine with only one USB controller (don't confuse USB socket...
by SteveDee
Wed Feb 25, 2015 7:48 pm
Forum: Beginners
Topic: desktop icons
Replies: 6
Views: 919

Re: desktop icons

... I've tried editing the idle.desktop file in /usr/share/applications but I still can't get it to appear on the desktop. Can anyone tell me how to do it? You can copy .desktop files from /usr/share/applications to /home/pi/Desktop and they should just appear, and be run-able on your desktop. You ...
by SteveDee
Wed Feb 25, 2015 8:48 am
Forum: Beginners
Topic: Videos recorded by RPI can't be played on Mac
Replies: 7
Views: 1834

Re: Videos recorded by RPI can't be played on Mac

...are you saying even though it's .mov, it's still h264 underneath? ... Yes, that's right. It doesn't matter what extension you give the file, it is still h264. There are a lot of articles on video file formats & conversion on the net. Here is an example Linux article: http://en.linuxreviews.org/H...
by SteveDee
Tue Feb 24, 2015 1:27 pm
Forum: General discussion
Topic: Bug with sudo shutdown -r now Under a Specific Situation
Replies: 8
Views: 1699

Re: problems with shutdown -r

...My program is to send a temperature value from a 18b20 sensor to a server after sending the temperature I do os.system('sudo modprobe -r w1-gpio') os.system('sudo modprobe -r w1-therm') .... I don't understand why you keep executing modprobe. These 2 commands should only be issued once each, aft...
by SteveDee
Tue Feb 24, 2015 1:14 pm
Forum: Beginners
Topic: One gpio, two npn
Replies: 9
Views: 1125

Re: One gpio, two npn

Smittie wrote:...You where almost right...
No, my brain was still fast asleep! My circuit uses white leds, so I know they typically have a Vf of 3.5 to 4V:-
http://en.wikipedia.org/wiki/Light-emit ... _materials
...Is the scheme with these components good?]
Yes, it looks good to me.
by SteveDee
Tue Feb 24, 2015 11:11 am
Forum: Beginners
Topic: Videos recorded by RPI can't be played on Mac
Replies: 7
Views: 1834

Re: Videos recorded by RPI can't be played on Mac

There are lots of different video and container formats. I think raspivid outputs H264 video without a container, and your Mac probably doesn't know what to do with it. So you will need to convert to a suitable format before it will play. This may help: http://raspi.tv/2013/how-to-shoot-video-and-co...
by SteveDee
Tue Feb 24, 2015 10:36 am
Forum: General discussion
Topic: Bug with sudo shutdown -r now Under a Specific Situation
Replies: 8
Views: 1699

Re: problems with shutdown -r

sunharrison wrote:...sudo shutdown -r now does not make the pi restart!
It would be a good idea to tell us what happens when you type:-

Code: Select all

sudo shutdown -r now
...in a terminal window.

For example; does the terminal return a message or other text? Does the terminal return to the command prompt, or just hang?
by SteveDee
Mon Feb 23, 2015 7:24 pm
Forum: Off topic discussion
Topic: Locked threads
Replies: 24
Views: 3550

Re: Locked threads

blc wrote:... it's been going since December 2011 and has now reached: 22,114 replies, 1106 pages, and 1,250,869 views. Now that is a mega-thread! :D
No, that's a Giga-Thread....we've already banned those here!
by SteveDee
Mon Feb 23, 2015 11:28 am
Forum: Off topic discussion
Topic: Locked threads
Replies: 24
Views: 3550

Re: Locked threads

I've never understood this obsession with closing old threads. What harm does it do to leave them open? If someone wrote a year ago that they were having a problem with such-n-such, is it a problem if someone comes along and says "did you ever find a fix for this?" If you want something to worry abo...
by SteveDee
Mon Feb 23, 2015 10:33 am
Forum: Beginners
Topic: where do I find help using leafpad?
Replies: 1
Views: 367

Re: where do I find help using leafpad?

...I can't seem to get it to edit as root and there is no help file on the program on my Pi.... I just found this: http://beginlinux.com/desktop_training/gos/rocket/859-leafpad If you want to open a file to edit as root, here are 2 ways:- 1. I normally use the default file manager (pcManFM) to find...
by SteveDee
Mon Feb 23, 2015 9:12 am
Forum: General discussion
Topic: Hardware watchdog?
Replies: 7
Views: 3306

Re: Hardware watchdog?

...If the heating system fails and the pipes freeze and burst, there can easily be tens of thousands of dollars worth of damage. Not life-threatening, but not a risk I want to take. So you've carried out a risk assessment, and you have a $35 RaspberryPi pc, set against potentially $10,000's damage ...
by SteveDee
Sun Feb 22, 2015 8:06 am
Forum: Off topic discussion
Topic: Mounting and Organization
Replies: 6
Views: 1483

Re: Mounting and Organization

For all of my old Model As, I just mounted them on old "6BA" sized bolts, with spacers. (They're a bit narrower than M3 bolts and fit fine.) ... It seems to me that M3 nuts, bolts, washers and nylon spacers are the most commonly available, and lowest price fixing. It's a shame that the Pi fixing ho...
by SteveDee
Sun Feb 22, 2015 6:29 am
Forum: General discussion
Topic: Hardware watchdog?
Replies: 7
Views: 3306

Re: Hardware watchdog?

...so I need near perfect reliability...Does anybody have any experience with this device? Are there any others that people recommend? I have no experience with the SwitchDoc, but it looks like you will also need a relay (or preferable a solid state device) for full, cold boot operation (i.e. to re...
by SteveDee
Sun Feb 22, 2015 4:59 am
Forum: General discussion
Topic: connect raspberry pi to PIC micro controller
Replies: 8
Views: 1429

Re: connect raspberry pi to PIC micro controller

...I am wondering if the 50mA limit still applies to the B+ + or has it changed? Yes, I think it probably has. The lovely Lady Ada seems to have taken a close look at the B+ electronics and thinks that the new regulator used to generate 3.3V may have a 1A rating: https://learn.adafruit.com/introduc...
by SteveDee
Sat Feb 21, 2015 9:52 pm
Forum: General discussion
Topic: connect raspberry pi to PIC micro controller
Replies: 8
Views: 1429

Re: connect raspberry pi to PIC micro controller

... the pic used pic16f877a You can run your Pic from 3.3Volts, which would then match the RaspberryPi GPIO supply voltage. However, you may not be able to use the Pi 3.3Volt supply to power your circuit if the pic requires more than 50mA (http://elinux.org/RPi_Low-level_peripherals). If that is th...
by SteveDee
Fri Feb 20, 2015 5:46 pm
Forum: General discussion
Topic: Corroded within a month? (Solved - mouse wee!)
Replies: 27
Views: 5709

Re: Corroded within a month?

Rugbywarrio89 wrote:...Upon opening the box, I got a good sniff of...mice....
I bet it was a microsoft mouse!
by SteveDee
Fri Feb 20, 2015 9:34 am
Forum: General discussion
Topic: the birdbox project and rain...
Replies: 5
Views: 1095

Re: the birdbox project and rain...

...Please can i have other people's thoughts, ideas and guidance on all of these question? Specifically the waterproof cable one... I wouldn't go knocking holes in my house until I considered all alternatives. But if you must, I'd suggest using Power Over Ethernet (POE) so you only need a relativel...
by SteveDee
Fri Feb 20, 2015 8:34 am
Forum: Beginners
Topic: One gpio, two npn
Replies: 9
Views: 1125

Re: One gpio, two npn

Sorry, one last comment and then I'll shut up! I don't think you mention the purpose of this system, but it looks like some kind of camera using either white or iRed leds to light the subject. (actually, looking at your circuit once more, I guess you have 3 white & 4 iRed leds. Is that right?). If t...
by SteveDee
Fri Feb 20, 2015 6:57 am
Forum: Beginners
Topic: One gpio, two npn
Replies: 9
Views: 1125

Re: One gpio, two npn

Smittie wrote: I don't want to draw to much amperes. So I thought that when I use a battery it will be safer. Please correct me if I'm wrong.
I doubt that an extra 100-150mA will cause problems. But measure system current before adding leds.
by SteveDee
Thu Feb 19, 2015 8:14 pm
Forum: Other projects
Topic: Bird nest box camera - solar and 3G
Replies: 15
Views: 11165

Re: Bird nest box camera - solar and 3G

You might like to take a look at my bird box project. The system does not need to run 24/7, so I use an activity detector and switch the Pi on/off using a cheap, low power, Picaxe. You will find many posts on my blog for BirdBox 2014 (uses a 555 timer) and 2015 (uses a 08m2 Picaxe). Start here: http...
by SteveDee
Thu Feb 19, 2015 7:50 pm
Forum: Beginners
Topic: Need help on streaming video from pi
Replies: 2
Views: 438

Re: Need help on streaming video from pi

...So does anyone know how to fix this or other package that could do these two things at the same time?... You can stream using Raspivid to a client running VLC. On VLC you can then press record (to record video) or press Snapshot (for a single picture). My notes may help: http://captainbodgit.blo...
by SteveDee
Thu Feb 19, 2015 7:38 pm
Forum: Beginners
Topic: Make Motion stream ONLY..
Replies: 2
Views: 1265

Re: Make Motion stream ONLY..

.... I couldn't find a forum for Motion to ask in.... The Motion website is: http://www.lavrsen.dk/foswiki/bin/view/Motion/WebHome Not sure if this helps, but if you want a high frame rate, take a look at my notes on using Raspivid and a VLC client rather than a browser:- http://captainbodgit.blogs...

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