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by BrendonShaw
Fri Aug 23, 2013 5:33 am
Forum: Automation, sensing and robotics
Topic: Servo Motor - Control Board - indeas & suggestions
Replies: 2
Views: 1143

Re: Servo Motor - Control Board - indeas & suggestions

Thanks for the feedback, I have only just looked at servo control on the RPi. My only concern and need to do some testing is the ability for the RPi to control 4 servo motors and with an increase in CPU load, still keep accuracy on timing on four PWM channels. Also thinking what is the best method t...
by BrendonShaw
Thu Aug 22, 2013 10:28 am
Forum: Automation, sensing and robotics
Topic: Remote Control Vehicle
Replies: 8
Views: 7305

Re: Remote Control Vehicle

I created this RPi robot, we have started a web site and can send you link if you woud like more information?

http://www.raspberrypi.org/phpBB3/viewt ... 4&p=346773
by BrendonShaw
Thu Aug 22, 2013 10:27 am
Forum: Automation, sensing and robotics
Topic: Servo Motor - Control Board - indeas & suggestions
Replies: 2
Views: 1143

Servo Motor - Control Board - indeas & suggestions

I am looking to develop a four channel servo motor interface board the RPi and thinking how to connect it to the RPi. I was wanted to ask how people would use it, to allow a suitable interface board. Option 1 - Using a uC as the interface have a couple of GPIO control to set the servo direction i.e....
by BrendonShaw
Sat Aug 03, 2013 6:11 am
Forum: Raspbian
Topic: 2xRPi file transfer - Run from C code
Replies: 3
Views: 1146

2xRPi file transfer - Run from C code

I am working on a project were I have two RPi's, each will be running a program (at this time write in C) and I want to transfer files between the two RPi's. The idea is the C program will generate a file based on various GPIO states and this will be transferred to the other RPi to execute/control s...
by BrendonShaw
Sat Jul 27, 2013 8:10 am
Forum: Raspbian
Topic: Have I killed by RPi?
Replies: 3
Views: 772

Re: Have I killed by RPi?

Thanks for the quick response, to help this is want happen: 1. Brand new RPi board from Farnell this week (so latest h/w etc) 2. SD Card with 2013-02-09-wheezy-raspbian OS 3. Powered up with a GPIO extension board, with the following connections GP0, GP1, GP2, GP3, GP4 & GP5 connected to an DC motor...
by BrendonShaw
Sat Jul 27, 2013 6:39 am
Forum: Raspbian
Topic: Have I killed by RPi?
Replies: 3
Views: 772

Have I killed by RPi?

I have been playing to get another robot vehicle up & running and I have a brand new RPi, but when I power it up from a known SD image just get a load of USB messages and then a prompt which I can type in commands. This is not the normal behaviour i.e. initial start up screen, no network interface c...
by BrendonShaw
Wed Jul 10, 2013 9:10 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI & atmega48 - bcm2835-1.15 odd results
Replies: 0
Views: 437

SPI & atmega48 - bcm2835-1.15 odd results

I have been working to interface an atmega48 with the RPi, everything seems to be okay except some odd behaviour with the SPI interface. Using the bare basics atmega48 ISR SPI code and the bcm2835-1.15 spi code examples. If I send one byte very slowly i.e. using returning sending the single byte I a...
by BrendonShaw
Sat May 18, 2013 1:36 pm
Forum: Automation, sensing and robotics
Topic: Robot sensor requirements – ideas & suggestions
Replies: 1
Views: 742

Robot sensor requirements – ideas & suggestions

I have developed my DC motor controller board and now looking to develop an interface board to support different sensors. I am interested in reading different ideas for a robot and the end applications people want to use them for. I have generated a short list of robot sensors & functions, just wond...
by BrendonShaw
Sat May 18, 2013 8:58 am
Forum: Raspbian
Topic: WiFi setup via USB stick
Replies: 3
Views: 863

Re: WiFi setup via USB stick

Thanks for the link, I am sure they must be a way to detect a USB memory stick and copy over a file. Looks like this could be my weekend mini project..
by BrendonShaw
Thu May 16, 2013 8:58 pm
Forum: Raspbian
Topic: WiFi setup via USB stick
Replies: 3
Views: 863

WiFi setup via USB stick

I want to setup a set of RPi boards for a local school could be up to 10 RPi, I find it bit complex to setup the WiFi as you need to power them up and configure them for the WiFi hub, this normal involves a TV, keyboard, mouse etc. Which would mean bring this kit into the school to configure the RPi...
by BrendonShaw
Wed May 15, 2013 7:40 pm
Forum: Automation, sensing and robotics
Topic: STEM PiBot - Up & Running
Replies: 4
Views: 1209

Re: STEM PiBot - Up & Running

Thanks for the web links, I am planning to make a SPI sensor interface board which can be hooked up directly to the RPi or via the DC motor controller board. Ideally I would like to have something like the lego mindstorm products and have an easy hook to this sensor board, so I would like to cover d...
by BrendonShaw
Wed May 15, 2013 5:28 am
Forum: Automation, sensing and robotics
Topic: STEM PiBot - Up & Running
Replies: 4
Views: 1209

Re: STEM PiBot - Up & Running

It's primary the cost and control of the system, I looked at Lego Mindstorms but the costs are very high for really simple sensors. If we manage to put the RPi into schools it would be nice to teach how to build up the electronics sensors such as light, distance, sound etc and the s/w interface into...
by BrendonShaw
Tue May 14, 2013 7:40 pm
Forum: Automation, sensing and robotics
Topic: STEM PiBot - Up & Running
Replies: 4
Views: 1209

STEM PiBot - Up & Running

I posted this on the education forum, but I wanted to share it here to get any more ideas to make the project exiting & interesting for the children. The age group is 7 to 11, but we have been asked to expand this up to older children with more software & hardware content. We purchase the robot chas...
by BrendonShaw
Fri May 10, 2013 6:08 pm
Forum: Staffroom, classroom and projects
Topic: Learning vehicle monitoring and control
Replies: 27
Views: 12004

Re: Learning vehicle monitoring and control

Interesting post, I am an automotive electronics/software manger working within a global T1 OEM developing the products reference in your mail. In a nutshell you are asking for a lot, there must be at least years development and the RPi would only play a very small part. But, it depends how would li...
by BrendonShaw
Fri May 10, 2013 5:34 pm
Forum: Teaching and learning resources
Topic: STEM PiBot Project
Replies: 2
Views: 2702

Re: STEM PiBot Project

Thanks for the feedback and I like the idea to add the speaker with some audio may be forward, reverse, left, right & stop. I plan to make an SPI interface board using at Atmega device, it's early stages but the SPI comm's okay and just hooking up the IR led's to support line follower. I been lookin...
by BrendonShaw
Sun May 05, 2013 7:35 am
Forum: Teaching and learning resources
Topic: STEM PiBot Project
Replies: 2
Views: 2702

STEM PiBot Project

We have recently started to work with a local school via the STEM program to provide a robot controlled from a RPi. I wanted to provide a short overview of the project and what we plan to provide, but looking for more ideas to make the project exiting & interesting for the children. The age group is...
by BrendonShaw
Wed May 01, 2013 11:30 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI Microcontroller speed
Replies: 1
Views: 1002

SPI Microcontroller speed

I am in the process of interfacing an atmega48 microcontroller to the RPi and thinking about the SPI bus speed. If I have a microcontroller running at 20Mhz and I want an SPI bus speed of 1953 kHz, I need to set the RPi SPI bus speed but will the microcontroller just detect the clock pulses and Tx t...
by BrendonShaw
Mon Apr 29, 2013 6:14 am
Forum: Camera board
Topic: Camera mounting info
Replies: 7
Views: 2541

Camera mounting info

I am working on a Pi Robot project for a school and I want to include the CSI camera. I was wondering if there is a CAD model of the camera or a drawing on how to mount the camera i.e. fixing, though the hole mounting etc.
by BrendonShaw
Sun Apr 21, 2013 10:16 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI Voltage convertion 5v <-> 3.3v
Replies: 1
Views: 6044

SPI Voltage convertion 5v <-> 3.3v

I am hooking up an attiny microcontroller which will run at 5v and I just want to check how to convert the SPI voltages between the two boards. I plan to use an 74HCT125 to convert the voltages and plan the following connections. RPi MOSI (3.3v) --> 74HCT125 ---> attiny (5v) [Convert voltage] RPi MI...
by BrendonShaw
Tue Apr 09, 2013 6:18 am
Forum: Automation, sensing and robotics
Topic: Bluetooth vs WiFi Pi Demo setup
Replies: 0
Views: 454

Bluetooth vs WiFi Pi Demo setup

I have a project with the Pi which I plan to demo in a local school in a few weeks time, currently it's connected via by home WiFi and ssh into the RPi. I don't think it will be possible to connect or might be difficult to setup a connection in the school using WiFi (I am sure it would be possible, ...
by BrendonShaw
Sun Mar 10, 2013 9:40 am
Forum: Raspbian
Topic: SD Card - Will not retain files after reboot
Replies: 1
Views: 488

SD Card - Will not retain files after reboot

I am having an odd problems with my RPi this weekend, the latest one is any files I un-tar are not retain after a re-boot. I am using the same scandisk extreme SD card and tried on two different RPi board and still the same problems. I created a new image from 2012-12-16-wheezy-raspbian and trying t...
by BrendonShaw
Mon Feb 18, 2013 3:53 pm
Forum: Automation, sensing and robotics
Topic: DC or Stepper motor - Robot project
Replies: 3
Views: 1727

DC or Stepper motor - Robot project

I am looking supporting a local school with a robot project and not which way to go with the motors DC or Stepper? DC would be really easy and PWM to control the speed but then not sure how to have the controller bidirectional. I don't think the RPi would be quick enough to control the stepper and w...
by BrendonShaw
Sun Feb 03, 2013 8:34 am
Forum: Raspbian
Topic: Multiple RPi WiFi comms
Replies: 3
Views: 897

Re: Multiple RPi WiFi comms

Many thanks for the quick repsonse and I should have thought of that. I have some GPIO code and I am just get that up & running on the slave, the only question & help would be providing the SSH access & transferring files in python or C. Is there any chance you could send me a link or direction were...
by BrendonShaw
Sat Feb 02, 2013 7:53 pm
Forum: Raspbian
Topic: Multiple RPi WiFi comms
Replies: 3
Views: 897

Multiple RPi WiFi comms

I am setting up a demo for a school and I am sure this has been done, but not sure what I should be searching for. I what one Pi to be the host and then several Pi acting as slave devices, all connected via WiFi on a local network. I have setup the host as a WiFi hotspot and now need to understand h...
by BrendonShaw
Mon Jan 28, 2013 7:59 pm
Forum: Raspbian
Topic: RPi Stand alone WiFi host
Replies: 5
Views: 4303

RPi Stand alone WiFi host

I am looking at setup a couple of RPi for demo, for various reasons I cannot connect to the local WiFi network and looking at running one of the RPi as a WiFi host & then connect the other RPi to the host. Ideally I want to transfer files to and from the host, manly to support some form of datalogge...

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