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by ToddFerrante
Sun Dec 02, 2012 8:49 pm
Forum: Graphics, sound and multimedia
Topic: Webcam stream
Replies: 38
Views: 60091

Re: Webcam stream

I was successful getting my Logitech c270 to stream using mjpg-streamer and the instructions in this thread: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=38&t=19661 I am able to view the video stream on my desktop, my laptop, and my Nexus 7 using firefox (desktop and laptop) and chrome (Nexus 7...
by ToddFerrante
Sun Dec 02, 2012 8:48 pm
Forum: Graphics, sound and multimedia
Topic: successful streaming to Raspberry Pi?
Replies: 0
Views: 760

successful streaming to Raspberry Pi?

I was successful getting my Logitech c270 to stream using mjpg-streamer and the instructions in this thread: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=38&t=19661 I am able to view the video stream on my desktop, my laptop, and my Nexus 7 using firefox (desktop and laptop) and chrome (Nexus 7...
by ToddFerrante
Sun Nov 18, 2012 9:56 pm
Forum: Automation, sensing and robotics
Topic: Driving multiple servos from the RaspberryPi
Replies: 209
Views: 92998

Re: Driving multiple servos from the RaspberryPi

I just discovered a nifty way to use servoblaster over a wireless (or wired) network link. Both computers need to be on the same network. First, install netcat onto both the robot controller and the control station using: sudo apt-get install netcat Keep in mind that I have "robotcontroller" and "co...
by ToddFerrante
Sun Nov 18, 2012 9:51 pm
Forum: Automation, sensing and robotics
Topic: Controlling servos and motors with a joystick
Replies: 9
Views: 15958

Re: Controlling servos and motors with a joystick

I haven't posted an update in a while because I have been working, unsuccessfully, on getting a usb webcam to stream from my Pi robot controller to my Pi control station. But, I just discovered something that is noteworthy. One of the tools suggested to stream the webcam is netcat. Though it didn't ...
by ToddFerrante
Sun Nov 11, 2012 7:11 pm
Forum: Graphics, sound and multimedia
Topic: Webcam stream
Replies: 38
Views: 60091

Re: Webcam stream

Thanks for the post. I already had my camera (Logitech c270) working with guvcview, so I knew it worked. I used your instructions with no changes and had success. It helps to know that the browser looking at the stream needs to use the address "http://IP/?action=stream". Be sure to include the port ...
by ToddFerrante
Sun Nov 11, 2012 1:02 pm
Forum: Automation, sensing and robotics
Topic: Using Raspberry pi to control motors using wifi
Replies: 1
Views: 679

Re: Using Raspberry pi to control motors using wifi

Enter the following into the "search" box at the upper right of the forum page "wifi servo control". The results should prove helpful to you.
Todd F.
by ToddFerrante
Sun Nov 11, 2012 12:55 pm
Forum: Automation, sensing and robotics
Topic: Starting robotics with raspberry pi?
Replies: 9
Views: 6461

Re: Starting robotics with raspberry pi?

Off the shelf, the Raspberry Pi can control up to 8 RC style servos (or motor drivers) using PWM control. This thread tells how: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=37&t=15011&hilit=servos For something like a camera pan/tilt, use position control servos. For driving motors, use the mo...
by ToddFerrante
Sun Nov 11, 2012 12:45 pm
Forum: Automation, sensing and robotics
Topic: Controlling multiple motors
Replies: 11
Views: 6989

Re: Controlling multiple motors

Chris,
To give a good answer, we need to know what type and size of motor you are talking about.
-steppers
-brushed DC
-brushless

Also, how much current will the motors draw? Are we talking tiny little motors for a desktop robot, or something that will power the spindle on a machine tool?
Todd F.
by ToddFerrante
Tue Oct 23, 2012 12:18 am
Forum: Automation, sensing and robotics
Topic: Controlling servos and motors with a joystick
Replies: 9
Views: 15958

Re: Controlling servos and motors with a joystick

I finally found a solution to making the wireless IP address static. It's in this post :
http://www.raspberrypi.org/phpBB3/viewt ... 85#p180585

I'm changing the wireless IP of robotcontroller to 192.168.1.11
Todd F.
by ToddFerrante
Mon Oct 22, 2012 1:08 pm
Forum: Automation, sensing and robotics
Topic: Using the Raspberry Pi as a Controller System
Replies: 6
Views: 2610

Re: Using the Raspberry Pi as a Controller System

I'm working on developing a similar system. You can see my current status in this thread: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=37&t=19939 My goal is to minimize non-Pi hardware if at all possible. So far, I haven't needed to use any more boards (like the Arduino, Gertboard, or adafruit ...
by ToddFerrante
Mon Oct 22, 2012 12:56 am
Forum: Automation, sensing and robotics
Topic: Controlling servos and motors with a joystick
Replies: 9
Views: 15958

Re: Controlling servos and motors with a joystick

Here is a status update on my project. I now have the joystick servo control working over a WiFi link. I'm using Raspberry Pis for both the control station and the robot controller. The control station Pi is hardwired to a wireless router, and has a static IP. The robot controller Pi has a WiFi tran...
by ToddFerrante
Sun Oct 14, 2012 12:40 pm
Forum: Automation, sensing and robotics
Topic: Driving multiple servos from the RaspberryPi
Replies: 209
Views: 92998

Re: Driving multiple servos from the RaspberryPi

I can never remember all the arbitrary pin numbers on the GPIO, so I just look at the picture of the GPIO pins (http://elinux.org/images/2/2a/GPIOs.png). Look at the dark green pins and count down from the top left. The top left green pin is servo 0. The next one down is servo 1. Moving to the right...
by ToddFerrante
Sat Oct 13, 2012 10:00 pm
Forum: Automation, sensing and robotics
Topic: Driving multiple servos from the RaspberryPi
Replies: 209
Views: 92998

Re: Driving multiple servos from the RaspberryPi

Smcintosh,
Whereabouts in the world are you located?
Are you having trouble on the software end, or the hardware end of getting your servos working?
I just posed a new thread about a Python program I wrote that lets you control the servos with a joystick.
Todd F.
by ToddFerrante
Sat Oct 13, 2012 9:10 pm
Forum: Automation, sensing and robotics
Topic: Controlling servos and motors with a joystick
Replies: 9
Views: 15958

Controlling servos and motors with a joystick

I've written a Python 3 program which controls servos and motors using input from a joystick. Up to 8 PWM channels can be controlled using just the Raspberry Pi GPIO pins. This program uses code and concepts from multiple sources. Credits: I use the servoblaster kernal and driver to output the PWM s...
by ToddFerrante
Sat Oct 06, 2012 12:01 am
Forum: Automation, sensing and robotics
Topic: Driving multiple servos from the RaspberryPi
Replies: 209
Views: 92998

Re: Driving multiple servos from the RaspberryPi

Video of the script user interface here.
http://youtu.be/oE-9DMR_x5Q
Todd F.
by ToddFerrante
Thu Oct 04, 2012 12:37 pm
Forum: Automation, sensing and robotics
Topic: Driving multiple servos from the RaspberryPi
Replies: 209
Views: 92998

Re: Driving multiple servos from the RaspberryPi

Thanks, Richard. I'll add that line. Any thoughts on how the turbo mode effects the output signals of servoblaster? I've got it disabled currently, but I'd like to enable it if won't mess with the signal timing. It seems to me that if the clock frequency can change to faster speeds to meet computati...
by ToddFerrante
Thu Oct 04, 2012 2:53 am
Forum: Automation, sensing and robotics
Topic: Driving multiple servos from the RaspberryPi
Replies: 209
Views: 92998

Re: Driving multiple servos from the RaspberryPi

I've been working on getting the servoblaster drivers up and running. I also was unsuccessful getting the files to load automatically, so I had to improvise. To start with, I made simple bash scripts to load and unload the driver. "sbload" works great, but "sbunload" doesn't completely unload the dr...
by ToddFerrante
Sun Sep 30, 2012 8:45 pm
Forum: Beginners
Topic: $PATH and scripts
Replies: 7
Views: 718

Re: $PATH and scripts

That was the problem. I renamed it "tftest" and it worked properly. I knew there had to be a simple answer.
Todd F.
by ToddFerrante
Sun Sep 30, 2012 8:12 pm
Forum: Beginners
Topic: $PATH and scripts
Replies: 7
Views: 718

$PATH and scripts

I'm about to rip my hair out I'm so frustrated. I just flashed back to a fresh Raspberrian, and updated. I've created the classic "hello world" script in /usr/local/bin, called "test". When I check my path with "echo $PATH", that directory is in my path. "pwd" shows that I'm in that directory. I use...

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