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by il_diavolo
Thu Jul 16, 2015 7:41 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 10366

Re: PiTeR, OpenCV and MagPi issue 28

I made a Google search on "Select timeout" and found a possible solution on the Stackoverflow site relating to Ubantu. I haven't had time to try the suggested solution yet but it seems it could be V4L playing up. I'll try it out in a couple of days and post the result.

Thanks

Colin
by il_diavolo
Wed Jul 15, 2015 9:30 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 10366

Re: PiTeR, OpenCV and MagPi issue 28

Thanks Derek I have managed to clone the Guzunty code now, I was trying the whole path to MagPi earlier which, of course, didn't work. However I still couldn't get the "so" file to work, as after copying it to .../pythonshared/python2.7 I get the same errors as before. I must admit to being out of m...
by il_diavolo
Wed Jul 15, 2015 7:59 pm
Forum: Troubleshooting
Topic: RPi 2 - No HDMI signal
Replies: 6
Views: 1183

RPi 2 - No HDMI signal - Solved and the Unsolved!

Just had my "New Horizons moment". Approaching Pluto rapidly and not able to see anything! However, I tried at least 4 known to be working SD cards and 2 fresh Noobs cards and nothing appeared, either on the monitor or the TV. I edited config.txt, "hdmi_safe", "hdmi_force_hotplug" and a couple of o...
by il_diavolo
Sun Jul 12, 2015 5:02 pm
Forum: Automation, sensing and robotics
Topic: PiTeR, OpenCV and MagPi issue 28
Replies: 47
Views: 10366

Re: PiTeR, OpenCV and MagPi issue 28

I am seeking help (nay, pleading for help!) with the programs on the Guzunty website, the github repository and opencv. Nothing seems to work satisfactorily. I see from the posts here that others have had success so I can only assume that I'm doing something wrong on a grand scale. Firstly I am unab...
by il_diavolo
Sun Jul 12, 2015 8:55 am
Forum: Troubleshooting
Topic: RPi 2 - No HDMI signal
Replies: 6
Views: 1183

Re: RPi 2 - No HDMI signal (resolved - sort of)

Just had my "New Horizons moment". Approaching Pluto rapidly and not able to see anything! However, I tried at least 4 known to be working SD cards and 2 fresh Noobs cards and nothing appeared, either on the monitor or the TV. I edited config.txt, "hdmi_safe", "hdmi_force_hotplug" and a couple of ot...
by il_diavolo
Sat Jul 11, 2015 7:25 pm
Forum: Troubleshooting
Topic: RPi 2 - No HDMI signal
Replies: 6
Views: 1183

Re: RPi 2 - No HDMI signal

MrEngman, I have tried hdmi_force_hotplug=1 but that did not resolve the problem.

drgeoff, I shall try that, thanks, I've got a couple of unused Noob SDs. If that doesn't work I'm guessing it's a hardware problem.

Il Diavolo
by il_diavolo
Sat Jul 11, 2015 4:49 pm
Forum: Troubleshooting
Topic: RPi 2 - No HDMI signal
Replies: 6
Views: 1183

RPi 2 - No HDMI signal

I have recently bought a RPi 2 to supplement my "old" RPi B rev 2. I have a Noobs SD/micro SD card on which I am developing software for a robot project, all the coding being done on the RPi B. When the RPi 2 was delivered a few weeks I ran it once using a previously configured micro SD from the B, ...
by il_diavolo
Tue May 05, 2015 12:10 pm
Forum: General discussion
Topic: Broken NAS connection
Replies: 1
Views: 324

Broken NAS connection

I have several SD cards and tend to use each one for a specific program. Each one has a copy of an executable file "./nas" in the pi folder which when run as "sudo ./nas" connects to my NAS drive on my network. The format is:- mount -t cifs -o guest //192.168.0.51/share /home/pi/nasdrive I recently ...
by il_diavolo
Wed Oct 29, 2014 2:19 pm
Forum: Camera board
Topic: Take, save and display photo for 10s, repeat
Replies: 8
Views: 1630

Re: Take, save and display photo for 10s, repeat

I have achieved something very similar using pygame.image.load(imagename.jpg) from Pygame in Python.
by il_diavolo
Wed Sep 03, 2014 9:40 pm
Forum: Camera board
Topic: Picamera long exposure - really?
Replies: 25
Views: 12093

Re: Picamera long exposure - really?

I am seeking some more help please. As the Picamera routine for a 6 second exposure is not working properly I have tried to call the raspistill command line in my main Python script using subprocess in this function: def longshot(): i = camera.iso s = camera.shutter_speed g = camera.awb_gains a = ca...
by il_diavolo
Tue Sep 02, 2014 12:45 pm
Forum: Camera board
Topic: Picamera long exposure - really?
Replies: 25
Views: 12093

Re: Picamera long exposure - really?

Many thanks, 6by9, my understanding is growing. I'll carry on experimenting. Best of luck with the job hunting.
by il_diavolo
Tue Sep 02, 2014 10:02 am
Forum: Camera board
Topic: Picamera long exposure - really?
Replies: 25
Views: 12093

Re: Picamera long exposure - really?

It is not my intention to stir up conspiracy theories, only to see if I can get the software to work. The script from the Picamera documentation is: import picamera from time import sleep from fractions import Fraction with picamera.PiCamera() as camera: camera.resolution = (1280,720) camera.framera...
by il_diavolo
Mon Sep 01, 2014 7:45 pm
Forum: Camera board
Topic: Picamera long exposure - really?
Replies: 25
Views: 12093

Re: Picamera long exposure - really?

Thanks ethanol100 I used your raspistill command string and can confirm that I got the picture I had originally expected, the second hand blurred over a 6 second arc. I also find that using ISO 800 in both the Picamera script and in raspistill results in very different exposures, I needed to drop th...
by il_diavolo
Mon Sep 01, 2014 12:57 pm
Forum: Camera board
Topic: Picamera long exposure - really?
Replies: 25
Views: 12093

Re: Picamera long exposure - really?

I confirm that the second hand moves in discrete 1 sec ticks. By the way, I am running Rasbian from a new image downloaded last week and Rpi-updated 2 days ago. I'll try altering the brightness value to see if that makes any difference. In the meantime I'd be grateful if someone could advise me what...
by il_diavolo
Sun Aug 31, 2014 8:25 pm
Forum: Camera board
Topic: Picamera long exposure - really?
Replies: 25
Views: 12093

Picamera long exposure - really?

I have updated my "Starwatch" astronomy program to incorporate the long exposure script from Picamera Documentation, Release 1.7, section 1.4.8 Capturing in low light. "Starwatch" is a Python script using Pygame and Picamera which shoots and displays rapid consecutive still jpegs or h264 video using...
by il_diavolo
Thu Aug 28, 2014 12:54 pm
Forum: General discussion
Topic: Any news on official Raspberry Display?
Replies: 260
Views: 94177

Re: Any news on official Raspberry Display?

August departs in a couple of days! Should I spend the fifty quid I've saved for the "official" display on something available now or is the wait nearly over? :D
by il_diavolo
Tue Aug 05, 2014 12:51 pm
Forum: HATs and other add-ons
Topic: gertboard Motor Controller test - failed (solved: low volt)
Replies: 3
Views: 1871

Re: gertboard Motor Controller test - failed

Been there, made the complaint, felt foolish! Yes, you need a minimum voltage of 7v I believe. I found that 4no AA batteries didn't work but 5no did.
by il_diavolo
Wed Jul 30, 2014 1:09 pm
Forum: Beginners
Topic: Pull up - Pull down, have I got it right?
Replies: 27
Views: 7995

Re: Pull up - Pull down, have I got it right?

I think I've got it straight in my mind now, you've been a great help people. I shall try programming it tonight (I'll leave "coding" to the young guns, along with "apps"). Should work first go, shouldn't it? :-)
by il_diavolo
Tue Jul 29, 2014 9:01 am
Forum: Beginners
Topic: Pull up - Pull down, have I got it right?
Replies: 27
Views: 7995

Re: Pull up - Pull down, have I got it right?

Sorry, I'll try to be a bit precise. The spec from the device says- Upon detecting a low-to-high signal edge on the DCD line, your driver should: (I'm ok with that bit, the "DCD" line can simply be connected to another GPIO pin rather than one used by the UART) Open the serial port, if not already o...
by il_diavolo
Tue Jul 29, 2014 8:30 am
Forum: Beginners
Topic: Pull up - Pull down, have I got it right?
Replies: 27
Views: 7995

Re: Pull up - Pull down, have I got it right?

Fascinating discussion people but perhaps irrelevant to my original posts. It's way over my head as someone who's just dallying with an inexpensive electronic education device aimed at young people and seeking help in the "Beginners" forum. Nobody has completely answered my final question, can I tog...
by il_diavolo
Mon Jul 28, 2014 7:00 pm
Forum: Beginners
Topic: Pull up - Pull down, have I got it right?
Replies: 27
Views: 7995

Re: Pull up - Pull down, have I got it right?

Thanks for the replies, very helpful and it is nice to know I wasn't too far off track. Another question if I may? The device I'm trying to attach requires a serial connection so I intend to use the UART on pins 8 and 10. (signal levels will not be greater than 3.3v). The device also requires that p...
by il_diavolo
Mon Jul 28, 2014 1:33 pm
Forum: Beginners
Topic: Pull up - Pull down, have I got it right?
Replies: 27
Views: 7995

Pull up - Pull down, have I got it right?

I think I understand but I'd be grateful if someone could confirm/deny it. If I want a GPIO pin to be held "high" I connect it to a 3.3v pin through a resistor. When the GPIO pin receives a signal to go "low" that signal overcomes the resistor? Similarly for the GPIO to be held "low" it needs to be ...
by il_diavolo
Wed Jul 23, 2014 8:22 pm
Forum: Troubleshooting
Topic: Resolution stuck at 592x448 while using vnc
Replies: 13
Views: 5017

Re: Resolution stuck at 592x448 while using vnc

Thanks AndyD, for the explanation on the difference between x11vnc and tightvnc. Another question if I may? As the x11 server is tied to the "true" screen does that mean that the PiCamera preview screen will display on the vnc screen on my Windows laptop. Sorry if I'm hijacking this thread but there...
by il_diavolo
Wed Jul 23, 2014 12:45 pm
Forum: Troubleshooting
Topic: Resolution stuck at 592x448 while using vnc
Replies: 13
Views: 5017

Re: Resolution stuck at 592x448 while using vnc

Something I don't understand. I can change the VNC screen size/resolution by simply using "-geometry" when starting the tightvnc server on the pi. Why would this not work for the op?
by il_diavolo
Thu Jul 17, 2014 3:34 pm
Forum: General discussion
Topic: Any news on official Raspberry Display?
Replies: 260
Views: 94177

Re: Any news on official Raspberry Display?

Sorry if this question has already been dealt with, but will the "official display" be able to show the preview image from the "official camera" or will that still only be available on the HDMI output?

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