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by Engine44
Tue Feb 10, 2015 3:31 pm
Forum: Camera board
Topic: Video File Won't Play
Replies: 35
Views: 7262

Re: Video File Won't Play

I guess I thought that I could just click on the h264 file and it would play. I guess not. I'll try the proposed solutions. Thanks. Here are my results so far: I opened VLC. The .h264 file appears on the Pi desktop but not in VLC so I couldn't run it there. I typed the line "omxplayer --fps 25 file....
by Engine44
Tue Feb 10, 2015 2:13 pm
Forum: Camera board
Topic: Video File Won't Play
Replies: 35
Views: 7262

Video File Won't Play

Hi,

Just setting up the camera module with a B+. Using a Macbook to control the Pi with SSH.

Camera seems to be working because I was able to view a still.

Tried a video.

A video file (vid h.264) was created but it won't open. Possible software setting? Help please.

Thanks
by Engine44
Mon Feb 09, 2015 12:13 pm
Forum: Camera board
Topic: Camera Module Streaming
Replies: 0
Views: 424

Camera Module Streaming

Hi, I just got a Pi camera module for my B+. I operate the Pi through my Macbook. I would like to stream video to the Macbook (and perhaps to an Android phone) without saving. It seems the standard streaming command automatically saves the stream, Does anyone know a proper command that doesn't save?...
by Engine44
Sun Feb 08, 2015 8:25 pm
Forum: Beginners
Topic: Screen Size
Replies: 2
Views: 412

Re: Screen Size

...The problem is that I can't see the whole window. ... You might like to try modifying the RaspberryPi /boot/config.txt file. It should be edited (as root) to include:- hdmi_force_hotplug=1 hdmi_group=2 hdmi_mode=16 Take a look at my notes: http://captainbodgit.blogspot.co.uk/2014/02/how-to-vnc-i...
by Engine44
Sun Feb 08, 2015 7:05 pm
Forum: Beginners
Topic: Screen Size
Replies: 2
Views: 412

Screen Size

Hi, I finally was able to setup remote operation of the Pi desktop on my Macbook. Now I am enabling my WiPi. The problem is that I can't see the whole window. I need to click on an ADD button to complete the WiPi setup, but I can't see the button. Apparently, it is off the bottom of the screen. How ...
by Engine44
Sun Feb 08, 2015 1:24 pm
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Re: Desktop

I THINK I DID IT, YEAH
by Engine44
Sun Feb 08, 2015 12:43 pm
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Re: Desktop

If the "autostart" folder inside the ".config" folder does not exist yet , create it : mkdir ~/.config/autostart ghans Yes, you're right. Thanks. I was able to create all required files. A sort of connection was established. In Finder, Raspberrypi was listed as shared. UPDATE: I made a few clicks a...
by Engine44
Sun Feb 08, 2015 11:42 am
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Re: Desktop

I decided to try this method: http://dennistt.net/2013/09/15/raspberry-pi/ Things went pretty well until I tried to use nano to create a required file: In order for the VNC server to start up at each boot, create the following file in ~/.config/autostart/x11vnc.desktop [Desktop Entry] Encoding=UTF-8...
by Engine44
Fri Feb 06, 2015 10:07 pm
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Re: Desktop

I think I've got the tightvncserver running on the Pi. Now I need VNC software for my Macbook. What are people using?

Thanks
by Engine44
Fri Feb 06, 2015 12:29 pm
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Re: Desktop

I decided to try the posted Raspberry method. I didn't get too far, lol. I installed the tightvncserver on the Pi. The following command was supposed to start a desktop session: vncserver :0 -geometry 1920x1080 -depth 24 I got this response: perl: warning: Setting locale failed. perl: warning: Pleas...
by Engine44
Fri Feb 06, 2015 12:12 pm
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Re: Desktop

drgeoff wrote:Why do you want the overhead and complication of having VNC in a VirtualBox?
The main reason is that I would like to keep everything in one place, if possible.
by Engine44
Fri Feb 06, 2015 9:10 am
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Re: Desktop

On the RPi site, there is a good writeup about using VNC to view the Pi desktop on a remote computer. Before I try that method I want to confirm one point: I want to view the Pi desktop on my Macbook but within a VirtualBox. The Mac is running Yosemite. I installed VirtualBox on it and created an Ub...
by Engine44
Fri Feb 06, 2015 8:41 am
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Re: Desktop

ghans wrote:Yes , you need to use VNC. Alternatively install XQuartz on
your Mac and try this :

Code: Select all

ssh -X pi@IP-ADRESS-OF-YOUR-PI
pcmanfm&
ghans
Thanks. I think I'll try VCN.
by Engine44
Thu Feb 05, 2015 9:38 pm
Forum: Beginners
Topic: Desktop
Replies: 14
Views: 1956

Desktop

Hi, I just connected my B+ to the internet for the first time. I'm using SSH control through my Macbook. I would like the Desktop environment to come up when I boot. I tried to configure that through raspi-config #3, but it didn't work. Am I doing something wrong? Do I need to use VNC because I am u...
by Engine44
Thu Feb 05, 2015 9:33 pm
Forum: Beginners
Topic: Power On
Replies: 3
Views: 508

Re: Power On

Thanks, everyone.
by Engine44
Thu Feb 05, 2015 7:33 pm
Forum: Beginners
Topic: Power On
Replies: 3
Views: 508

Power On

Hi,

Is it acceptable to leave a B+ powered on?

Thanks
by Engine44
Thu Feb 05, 2015 9:40 am
Forum: Beginners
Topic: SD Card for Raspbian
Replies: 19
Views: 2463

Re: SD Card for Raspbian

The system couldn't find the .img file on my Desktop. Had to cd to Desktop. Then it worked.
by Engine44
Wed Feb 04, 2015 7:20 pm
Forum: Beginners
Topic: SD Card for Raspbian
Replies: 19
Views: 2463

Re: SD Card for Raspbian

Thanks.

On the site, the following instruction is detailed:

sudo dd bs=1m if=path_of_your_image.img of=/dev/diskn

My img. is on the desktop. What path do I need to use?

Thanks
by Engine44
Wed Feb 04, 2015 1:54 pm
Forum: Beginners
Topic: SD Card for Raspbian
Replies: 19
Views: 2463

SD Card for Raspbian

Hi,

I'm trying to load Raspbian onto an SD card using my Macbook. Apparently a loading app is required. I found this one:

RPi-sd card builder v1.2

Has anyone used this one or is there another that is popular?

Thanks.
by Engine44
Wed Jan 28, 2015 2:03 pm
Forum: Automation, sensing and robotics
Topic: Robot Motor Control
Replies: 15
Views: 1690

Re: Robot Motor Control

You really need to figure out the motor specs, otherwise you stand a good chance of burning out the motor drivers if they can't handle the correct voltage and stall current. If the motors are like the small yellow motors on Magician chassis, you likely only need 3-6V @ 1A max, in which case L293D's...
by Engine44
Wed Jan 28, 2015 1:55 pm
Forum: Automation, sensing and robotics
Topic: Robot Motor Control
Replies: 15
Views: 1690

Re: Robot Motor Control

joan wrote:
Engine44 wrote: ...
Good point, thanks. Perhaps there will only be 4 wheels. As you suggest, only two controllers. It would be nice to be able to conrol the speed of the robot in addition to its direction.
You will be able to use PWM to control the motor speed (rapidly switching the motors on/off).
Thanks
by Engine44
Wed Jan 28, 2015 1:48 pm
Forum: Automation, sensing and robotics
Topic: Robot Motor Control
Replies: 15
Views: 1690

Re: Robot Motor Control

I'm considering building a robot with 6 wheels (6 motors). Just a quick question - will that be three motors per side and controlled like a tank? That is, the three motors in each group always run in the same direction? If so, you will need less control signals passing through to whatever motor dri...
by Engine44
Wed Jan 28, 2015 1:42 pm
Forum: Automation, sensing and robotics
Topic: Robot Motor Control
Replies: 15
Views: 1690

Re: Robot Motor Control

Gertbot would be the obvious choice rather than Gertboard. http://uk.farnell.com/gertboard/gertbot/gertbot-robotics-board-for-raspberry/dp/2452189?mckv=sBf52BWkv|pcrid|59936925248|kword|gertbot|match|p|plid|&CMP=KNC-GUK-FUK-GEN-SKU-MDC 4 H-Bridge drivers onboard, so 4 motors with bi-directional con...
by Engine44
Wed Jan 28, 2015 1:27 pm
Forum: Automation, sensing and robotics
Topic: Robot Motor Control
Replies: 15
Views: 1690

Re: Robot Motor Control

It seems to say the gertboard can only control one DC motor (connected to MOTA/MOTB). We need to know the voltage and current (stall preferably) of the motors you want to use (or may eventually want to use). I'm sorry, I don't know the size yet. If you assume the smallest practical size, does that ...
by Engine44
Wed Jan 28, 2015 1:19 pm
Forum: Automation, sensing and robotics
Topic: Robot Motor Control
Replies: 15
Views: 1690

Re: Robot Motor Control

Thanks for the manual link. It seems to say that the Gertboard can control only 2 motors. If a robot has more than 2 drive wheels, what are the best controller options? I assume that buying additional Gertboards is not the answer, lol.

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