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by abroun
Tue Nov 25, 2014 6:17 pm
Forum: For sale
Topic: Build a Raspberry Pi Camera Robot (Updated)
Replies: 15
Views: 39497

Re: Build a Raspberry Pi Camera Robot (Updated)

With powerbank, I assume you can either power mini driver and rpi separately (most powerbanks have few outs, the one I've ordered has two), or you could power mini driver and then rpi from 5V out of mini driver. This is correct I think, provided that the powerbank output you use can provide enough ...
by abroun
Fri Sep 26, 2014 8:33 pm
Forum: For sale
Topic: Build a Raspberry Pi Camera Robot (Updated)
Replies: 15
Views: 39497

Re: Build a Raspberry Pi Camera Robot (Updated)

Nice, I don't think I've ever seen anyone else assemble the kit in that way, but it certainly shows the flexibility of the chassis. :) I can't think of any massively functional uses for the servo, but you could give your robot a tail, and then wag it when the robot is 'happy'. Perhaps combine it wit...
by abroun
Tue Sep 16, 2014 5:11 pm
Forum: For sale
Topic: Build a Raspberry Pi Camera Robot (Updated)
Replies: 15
Views: 39497

Re: Build a Raspberry Pi Camera Robot (Updated)

We've made a couple more updates (much improved battery life, and a tutorial showing how to attach lots of different sensors). We aim to keep improving the robot kit and the software over time, so if anyone has any suggestions for features they'd like to see in the future, we'd love to hear them. Ch...
by abroun
Sat Aug 16, 2014 12:42 pm
Forum: Automation, sensing and robotics
Topic: A Robot for RoboCup Junior with image processing - with code
Replies: 20
Views: 22872

Re: A Robot for RoboCup Junior with image processing

Hi Arne, First up, really fantastic work, and that's a great write up you've produced. With regards to line following with a camera, the RS4 self balancing robot , performs line following with a slightly different technique, which the guy who built the robot describes on his blog here . Also, if you...
by abroun
Fri Aug 15, 2014 9:08 am
Forum: For sale
Topic: Efficiently run your Pi from batteries using a UBEC
Replies: 2
Views: 4136

Re: Efficiently run your Pi from batteries using a UBEC

Hi there, I hadn't thought of it before (as I'm not that imaginative) but yes, this UBEC is also a handy way of charging your phone off batteries (see the photo of my phone charging below). No worries about connecting the batteries the wrong way round either as the UBEC has reverse polarity protecti...
by abroun
Thu Aug 14, 2014 5:45 pm
Forum: For sale
Topic: Efficiently run your Pi from batteries using a UBEC
Replies: 2
Views: 4136

Efficiently run your Pi from batteries using a UBEC

We now sell 3A UBECs, for running the Raspberry Pi off batteries, in our store . UBECs (Universal Battery Elimination Circuits) are efficient switching voltage regulators that convert a high battery voltage into a regulated voltage suitable for running electronics. UBECs are often used in remote con...
by abroun
Wed Jun 18, 2014 11:15 am
Forum: For sale
Topic: Build a Raspberry Pi Camera Robot (Updated)
Replies: 15
Views: 39497

Re: Build a Raspberry Pi Camera Robot (Updated)

We've made some changes to the robot over the last couple of months. Replying to make the post visible again...
by abroun
Sun May 25, 2014 1:25 pm
Forum: Troubleshooting
Topic: RaspberryPi - Arduino serial connection
Replies: 4
Views: 5564

Re: RaspberryPi - Arduino serial connection

Hi there, I've used the Pi with an Arduino for building a number of robots and have had no problem getting communication to work reliably at 57600bps over USB. 115200bps should also work but I haven't tried it much. I tend to use Python with PySerial on the Pi side, but wiringSerial should work just...
by abroun
Mon May 19, 2014 2:51 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi there, First of all, apologies that my first reply didn't work. I think the key lesson here is not to offer advice without having the hardware to test it. :oops: Now reading through the PyMata and Firmata source code a bit more carefully, it looks like the lines you actually want here are # initi...
by abroun
Sat May 17, 2014 12:56 pm
Forum: Beginners
Topic: Raspi Cam + Webiopi
Replies: 2
Views: 2762

Re: Raspi Cam + Webiopi

Hi there, I've put together a small program call raspberry_pi_camera_streamer , for a robot project , which should do what you want. It uses a modified version of the http server code from mjpg-streamer used in that tutorial so once you've built it, and start it running, it should work with the rest...
by abroun
Sat May 17, 2014 12:45 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi there, If you're still having a problem with this then I think that you're almost there, you should just need to set the pins to ANALOG rather than PWM. So the following should hopefully work (no Pi Co-op or Arduino on hand to test this at the moment) # initialize the pins as analog output. firma...
by abroun
Tue Apr 22, 2014 5:53 pm
Forum: Camera board
Topic: Setting quality level and/or bitrate for MMAL_ENCODING_MJPEG
Replies: 2
Views: 1097

Re: Setting quality level and/or bitrate for MMAL_ENCODING_M

Thanks for the reply. I'm not really aiming for a bitrate as low as 100kbits/s but it does demonstrate the problem I'm having fairly well. :) You can find the source for the project I'm trying to use this in here . Basically, bits copied from raspivid to get me familiar with mmal, mashed together wi...
by abroun
Tue Apr 22, 2014 1:00 pm
Forum: Camera board
Topic: Setting quality level and/or bitrate for MMAL_ENCODING_MJPEG
Replies: 2
Views: 1097

Setting quality level and/or bitrate for MMAL_ENCODING_MJPEG

Hi there, I'm playing around with mmal, creating a video encoder component with encoding set to MMAL_ENCODING_MJPEG. This seems to be working well, in that I get a series of JPEG images out the other end. My problem is that I can't see any way to set the quality level of the images, and have it stic...
by abroun
Mon Mar 24, 2014 10:54 am
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi Chris, If you've got a spare SD card available, could you try using the current version of Raspbian ( 2014-01-07-wheezy-raspbian.zip ) and then following the steps in the 'Simple Installation Process' section? I've just done this at my end and everything works fine. The script run in the Simple I...
by abroun
Sun Mar 23, 2014 8:25 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi Chris, Apologies for the late reply to this, I've been out all day. It looks for some reason as if the code to reset the Arduino (and thus prepare the bootloader to receive code) is not being called. I'm a bit confused though, is this the same SD card that you've been running the PyMata examples ...
by abroun
Sat Mar 22, 2014 5:32 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

. If it is off the board, how is it controlled? Sorry, missed this part. It looks like SPI isn't currently supported by Firmata, although there is a proposal to add it . You can however make use of SPI by writing you own Arduino sketch and using the Arduino SPI library. Serial communication back to...
by abroun
Sat Mar 22, 2014 5:21 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Here's my version: http://www.raspberrypi.org/forum/viewtopic.php?f=46&t=50744 Ah cool, I hadn't seen that one. There are indeed, many, many Arduino add-on boards for the Pi out there. I think that incorporating an Arduino appears as quite a logical step when trying to integrate the Pi with externa...
by abroun
Sat Mar 22, 2014 5:14 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi Chris, In this situation, the SPI lines can't talk to the Pi. The Arduino can communicate using SPI to other devices, but all communication between the Pi and the Arduino on the Pi Co-op is limited to serial UART. The SPI lines could be connected to the Pi, but we took the decision not to just be...
by abroun
Sat Mar 22, 2014 1:10 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi Gandar,

This is effectively an Arduino Uno, that connects directly to the GPIO pins.

Regards

Alan
by abroun
Sat Mar 22, 2014 1:07 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi there, Yes, as Dougie kindly pointed out. This is a standard ISP programming header, which you would connect to using a programmer such as this one . The pins are connected directly to the Atmega328. In general when reading a schematic, pins which have the same name are connected to each other, b...
by abroun
Wed Mar 19, 2014 12:03 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi Chris,

Looks very nice, and thank you for your order. :)

Interested to know how you get on with it. Any problems, or if there's any extra information you need, just gimme a shout.

Regards

Alan
by abroun
Sat Mar 15, 2014 8:29 pm
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

Re: The Pi Co-op - an Arduino Add-on Board for the Raspberry

Hi Chris, Thanks for the questions. The documentation is a bit sparse I'm afraid, but I'm looking to improve it all the time, and your questions give me some good pointers to areas which need to be expanded. :) Basically, the Pi Co-op is an Arduino Uno, just one that's more integrated with the Raspb...
by abroun
Sat Mar 15, 2014 7:48 pm
Forum: Automation, sensing and robotics
Topic: Can someone build me a Pi Bot?
Replies: 13
Views: 3042

Re: Can someone build me a Pi Bot?

Hi there, Thanks for the kind comment. :) The flex cable works reasonably well, although you do need to be careful when routing it originally to make sure that it doesn't snag on anything. The main point of stress comes when the head turns to the right, but on the robot pictured in the tutorial, whi...
by abroun
Sat Mar 15, 2014 11:06 am
Forum: For sale
Topic: The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi
Replies: 32
Views: 12461

The Pi Co-op - an Arduino Add-on Board for the Raspberry Pi

Hi all, The Pi Co-op from Dawn Robotics is an easy to use Arduino add-on board for your Pi, on sale here . We've created a video showing what it is, and why you might want to buy one here . Also, we've published a tutorial here showing how you can use Firmata to control the Pi Co-op from a higher le...
by abroun
Sat Mar 15, 2014 10:46 am
Forum: Automation, sensing and robotics
Topic: Can someone build me a Pi Bot?
Replies: 13
Views: 3042

Re: Can someone build me a Pi Bot?

Hi there, I've got a tutorial on building a Raspberry Pi camera robot that you can drive around using a web browser on a tablet, phone or pc, which you can find here . If you've got any questions about the build process or source code, please just ask. Regards Alan http://blog.dawnrobotics.co.uk/wp-...

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