Go to advanced search

by Applicable_Robotics
Fri Aug 19, 2016 5:25 am
Forum: Camera board
Topic: Replacement Lens for the V2 Camera
Replies: 1
Views: 1346

Replacement Lens for the V2 Camera

Hi,
Has anyone found a drop-in replacement lens for the V2 Camera?
Also, is the IR filter on the V2 camera part of the lens or is it placed directly on the sensor like the V1?
Thanks,
Nicholas
by Applicable_Robotics
Wed Mar 25, 2015 12:44 am
Forum: General discussion
Topic: Raspi 2 GPIO Power Supply
Replies: 6
Views: 1030

Re: Raspi 2 GPIO Power Supply

@techj2020 The power supply on the shield is a 15 watt (~1.8 amps at 3.3 volts) switching power supply available at http://www.newark.com/murata-power-solutions/okr-t-3-w12-c/dc-dc-conv-non-iso-pol-1-o-p-15w/dp/14R7976 . Thanks, the shield is essentially just a way to connect a Teensy 3.1 and MPU-91...
by Applicable_Robotics
Wed Mar 25, 2015 12:22 am
Forum: General discussion
Topic: Raspi 2 GPIO Power Supply
Replies: 6
Views: 1030

Re: Raspi 2 GPIO Power Supply

Thanks for the reply. Last year I made a custom shield for the model B. This shield supplies 3.3 volts directly to pins 1 & 2 of the GPIO header. The 3.3 volt supply to pin 2 can be disconnected if necessary (solder jumper). I would like to use this shield with the RPi 2, however I do not want to fr...
by Applicable_Robotics
Tue Mar 24, 2015 9:39 pm
Forum: General discussion
Topic: Raspi 2 GPIO Power Supply
Replies: 6
Views: 1030

Raspi 2 GPIO Power Supply

Hi,
I heard rumors that the RPi 2 cannot be powered by supplying 3.3 volts to the GPIO pins.
Are these rumors true or can I power the RPi 2 by putting 3.3 volts into the GPIO pins?
Thanks,
Nicholas
by Applicable_Robotics
Sun Feb 08, 2015 4:09 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 32088

Re: Compute Module Test Board

Thanks for this Briarios, it will be a great help.
Could you post the library files you used in the board design?
I would like to use a right-angle SODIMM connector, and having the libraries should help.
Thanks again,
Nicholas
by Applicable_Robotics
Tue Feb 03, 2015 1:52 am
Forum: General discussion
Topic: The Raspberry Pi 2 Q&A thread
Replies: 442
Views: 111141

Re: The Raspberry Pi 2 Q&A thread

Does the foundation have a time frame for the release of the Compute Module 2? Also, have you considered making a version of the compute module that uses a microSD card instead of a fixed size eMMC chip? That also might eliminate the eMMC disable circuit? Maybe another solution is using a header sim...
by Applicable_Robotics
Wed Dec 31, 2014 5:06 am
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 32088

Re: Compute Module Test Board

Hi Briarios,
How is the testing coming?
Could you release your current Eagle files even if they are not fully tested?
Also, what Eagle library are you using for the SODIMM connector pinout?
This project has been quite helpful for the timely execution of mine.
Thanks,
Nic
by Applicable_Robotics
Thu Nov 13, 2014 7:02 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

Hello ddudas, This library has not been abandoned, and Dave's version of the library is the most current release. Technically the library is still under development, however the updates may be sporadic. I just haven't gotten around to updating my github library with 6by9's version. I am rather surpr...
by Applicable_Robotics
Thu Nov 13, 2014 7:00 pm
Forum: Compute Module
Topic: Compute Module Test Board
Replies: 108
Views: 32088

Re: Compute Module Test Board

Hello Briarios, Have you made any progress on the testing of the latest batch of boards? I am considering building a few CM BoB's for a project, and it would be quite helpful to have something to build from. On a related note, how have you managed to create matched resistance routed pairs in eagle? ...
by Applicable_Robotics
Mon Oct 20, 2014 12:24 am
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

I cannot guarantee the stability of this link, but if you can download from Dropbox, then this should help. https://www.dropbox.com/l/IyBaeUCQUlziiQ3xYwICkr I will update this post later with a Google Drive download link. Edit: https://drive.google.com/file/d/0B0alP0wgEdzbc2FCU2ZEYzB2V0U/view?usp=sh...
by Applicable_Robotics
Sat Oct 18, 2014 8:40 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

I am currently hosting my website with godaddy, and am struggling to find an alternative site. You could try downloading it from http://benjaminjohnstonphotography.com/10-2-14_raspbian_with_opencv_2.4.9.tar.gz , although that domain is also hosted with godaddy. Until then, have you verified that you...
by Applicable_Robotics
Sat Oct 04, 2014 11:33 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

I just realized that the tar.gz file I had uploaded was poorly organised, so I remade the archive and uploaded it to my website. Additionally, I included the sha1 hash in a text file in the archive. To check the extracted files I use the following command (linux): sha1sum *.img | grep $(cat sha1_has...
by Applicable_Robotics
Sat Oct 04, 2014 11:05 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

@stu: No problem, I am glad I was able to help. @All I have continued to work on the image with OpenCV and this library, however I have hit a roadblock. When using the latest version of raspbian and the latest firmware, the library hangs after about six executions of the encoder callback function. M...
by Applicable_Robotics
Fri Oct 03, 2014 7:23 am
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

I have the OpenCV-only version ready and am uploading it to my website. FYI, I forgot to enable the camera, hopefully this does not affect anything. Using tar.gz compression decreased the file size, it is now ~1.8 Gb. The extracted image file should have a sha-1 hash of f9e03800bd782ee1f41f541aac8ab...
by Applicable_Robotics
Wed Oct 01, 2014 8:21 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

@Stu: I did complete the clean OpenCV install, however I seem to have misplaced the sd card it was on. My raspi is currently doing another clean install of OpenCV 2.4.9 with the latest raspbian, and I will (most likely) have the img file ready in less than 24 hours. The image will include a build of...
by Applicable_Robotics
Sun Aug 17, 2014 6:57 am
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

The code in 6by9's repo does work, however I am still writing the code that creates and manages a TCP video link. The "currently not functioning properly" is just a remnant from my version of the library. Until I finish the TCP link code, using netcat and mplayer should work. I am currently creating...
by Applicable_Robotics
Tue Jul 29, 2014 9:01 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

Sorry for the confusion. I am using this library as part of an autopilot for a rc aircraft. The on-board OpenCV processing is for object detection, landing alignment, etc. I also need the H264 feed to create a real-time video link to the ground station. At the ground station, I need to overlay some ...
by Applicable_Robotics
Mon Jul 28, 2014 10:00 pm
Forum: C/C++
Topic: OpenCV decode H264 frame-by-frame
Replies: 5
Views: 13226

OpenCV decode H264 frame-by-frame

Hi, I am attempting to overlay text on a video feed from the Raspberry Pi Camera using OpenCV Currently I have a feed working (without overlay) using the following commands: Send: raspivid -n -t 0 -w 640 -h 480 -b 1000000 -fps 30 -o - | nc [insert destination IP address here] 1500 Recv: nc -l -p 150...
by Applicable_Robotics
Mon Jul 28, 2014 9:43 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

This is awesome, thanks! My computer has been acting up for the last few days, so I just got around to testing your modifications. I am still getting a "failed to set port parameter 64:0:EINVAL" error, but it is working perfectly so I am not worried. Now I just have to figure out how to decode the r...
by Applicable_Robotics
Wed Jul 23, 2014 10:11 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

I don't mean to impose, but have you had a chance to test the library? If you need a copy of raspbian with opencv installed, the links provided in post #7 (of this thread) should work, although you will need to update the contents of ~/git/robidouille/raspicam_cv/ with the files from the github repo...
by Applicable_Robotics
Mon Jul 21, 2014 6:01 am
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

I meant to respond sooner, but have been out of town without any Internet.
If you have some time to test it that would be great; I really appreciate the help.
by Applicable_Robotics
Fri Jul 18, 2014 8:08 am
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

Thanks. I should have realized that from mmal_port_parameter_set_boolean(camera_video_port, MMAL_PARAMETER_CAPTURE, 1) which will start output[1] Something is still wrong with my code, because the encoder_buffer_callback function only seems to execute three times, and printEncoder just prints garbag...
by Applicable_Robotics
Thu Jul 17, 2014 7:35 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

I just started applying the modifications you suggested, but when I change the MMAL_CAMERA_VIDEO_PORT parameter to 0, the program throws the error shown below. mmal: mmal_vc_port_parameter_set: failed to set port parameter 64:1:EINVAL mmal: raspiCamCvCreateCameraCapture: Failed to start capture I tr...
by Applicable_Robotics
Wed Jul 16, 2014 7:13 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

I have modified mmal_logging.c file, run rpi-update, and changed line 560. I can't believe I missed the problem on line 560; changing it fixed the problem with creating the encoder. Also, if you get the chance, could you point me in the right direction for connecting the encoder to the video port? M...
by Applicable_Robotics
Wed Jul 16, 2014 12:37 pm
Forum: Camera board
Topic: Low Latency video link incorporating OpenCV
Replies: 42
Views: 11011

Re: Low Latency video link incorporating OpenCV

The errors still persist, and yes, the error calls do print to the console. When line 676 uses "create_encoder_component(state)" the following errors are created: mmal: mmal_vc_port_parameter_set: failed to set port parameter 64:0:EINVAL mmal: Argument is invalid mmal: buffer null (the program then ...

Go to advanced search