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by davidb24v
Wed Dec 18, 2013 8:22 pm
Forum: HATs and other add-ons
Topic: ATmega setup, etc.
Replies: 39
Views: 11993

Re: ATmega setup, etc.

I have a bunch of stuff connected to digital pins 8-13 and can't be bothered unplugging the shield I'm using to program the 328. I'd really like to use the gertduino on my work-in-progress robot instead of an Arduino Uno (it saves me the bulk of a USB cable as the gertduino plugs directly into the P...
by davidb24v
Thu Nov 28, 2013 6:09 pm
Forum: HATs and other add-ons
Topic: LOL!
Replies: 1
Views: 1448

LOL!

Well I was wondering what was the daftest thing I could connect to the gertduino. How about this... http://www.electrickery.org.uk/wp-content/uploads/2013/11/IMG_20131128_175652.jpg An Olimex LOL shield using 10mm LEDs! It does sort of dominate things a bit :lol: Have a video: http://www.youtube.com...
by davidb24v
Thu Nov 28, 2013 5:11 pm
Forum: HATs and other add-ons
Topic: raspberry pi doesn't boot [solved]
Replies: 50
Views: 26034

Re: raspberry pi doesn't boot

Haven't had time to play with the gertduino until just before work this morning. I used Richard's jumper trick to get it to boot and have just erased the mega48 and programmed the 328 with the blink sketch. After erasing the mega48 it boots just fine, with or without jumpers. It would be interesting...
by davidb24v
Thu Mar 28, 2013 8:58 pm
Forum: Python
Topic: Don your testing hats, it's WiringPi2-Python
Replies: 54
Views: 17262

Re: Don your testing hats, it's WiringPi2-Python

Implemented: yes. Tested: no. I don't have one to try! Good luck, and do yell at me if anything explodes. Gordon has tested it, I believe, so if it doesn't work it's probably the wrappers fault. This is great stuff, will have a play soon, got too many other things to play with at the moment - me an...
by davidb24v
Sat Jan 05, 2013 12:42 pm
Forum: HATs and other add-ons
Topic: Gertboard charity auction on eBay
Replies: 0
Views: 780

Gertboard charity auction on eBay

My Gertboard is listed here for anyone interested. Quick summary: It all seems to work apart from the motor driver. I've thrown in a brand new Adafruit Motor Shield Kit which you could drive using the ATmega328P on the Gertboard or possibly the Raspberry Pi itself - do find out if you need a level s...
by davidb24v
Thu Jan 03, 2013 9:01 pm
Forum: HATs and other add-ons
Topic: Gertboard Software in Python - Released
Replies: 80
Views: 21903

Re: Gertboard Software in Python - Released

Been through all the tests now. It works, apart from the motor driver. I blame the person who clumsily assembled it :lol: I bought the Gertboard to learn, by the time I got it I sort of already had. Obviously my soldering skills could have been better :oops: Going to put it on eBay for charity - can...
by davidb24v
Wed Jan 02, 2013 9:37 pm
Forum: HATs and other add-ons
Topic: Gertboard Software in Python - Released
Replies: 80
Views: 21903

Re: Gertboard Software in Python - Released

Alex, Thanks for all you've done here. I built (aka - lashed together) my Gertboard a while ago, haven't had much time to play with it until now (well, haven't got much time now as we're trying to nurse our beloved cat through an "infection" that turned out to be meningitis). My python skills are no...
by davidb24v
Wed Dec 19, 2012 12:08 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: MCP23017 driving me nuts...
Replies: 2
Views: 929

Re: MCP23017 driving me nuts...

Hi,

Have you wired the reset pin to 3V3? That caught me out once...

Dave
by davidb24v
Fri Nov 23, 2012 8:14 pm
Forum: HATs and other add-ons
Topic: HotPi kickstarter, LIRC, RTC & more for the GPIO port
Replies: 4
Views: 2151

Re: HotPi kickstarter, LIRC, RTC & more for the GPIO port

I'm in :D Hey, it's cheap, I can do stuff with it. What's not to like? Would love to see more Pi related projects on KickStarter, I seem to have a 40ft ISO container of SmartDuino bits turning up in March and I've got Eve so... somehow, this will all work. I think :lol: I'm also convinced that there...
by davidb24v
Sun Nov 18, 2012 9:30 pm
Forum: Automation, sensing and robotics
Topic: Obstacle avoiding autonomous robot
Replies: 8
Views: 7475

Re: Obstacle avoiding autonomous robot

Thanks catmaker. Progress has been slow recently. It seems to me that the 90/%/10% rule that applies to software projects also applies to hardware - you get 90% of it done in 10% of the time. Fact! Not a fact I like, but it seems to be one of them "universal law" thingies. My impediment this last we...
by davidb24v
Mon Nov 12, 2012 5:08 pm
Forum: Automation, sensing and robotics
Topic: Obstacle avoiding autonomous robot
Replies: 8
Views: 7475

Re: Obstacle avoiding autonomous robot

Apologies, I posted the wrong link to a post about the weekends efforts. It should have been: http://www.electrickery.org.uk/index.ph ... per-motor/

It looks like the Sugru has worked so it's time to start putting this thing back together again...

Dave
by davidb24v
Sun Nov 11, 2012 10:19 pm
Forum: Automation, sensing and robotics
Topic: Obstacle avoiding autonomous robot
Replies: 8
Views: 7475

Re: Obstacle avoiding autonomous robot

Seem to have had a few hardware problems - the odd dry joint, the odd short, nothing serious. I've progressed the scanning ultrasonic sensor idea and am currently waiting for some "Sugru" to dry - hmmmm..... There must be a better way to connect stuff to motors? Here a video of a stepper moving a pi...
by davidb24v
Sun Nov 11, 2012 8:06 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Controlling stepper motors via I2C?
Replies: 10
Views: 9053

Re: Controlling stepper motors via I2C?

Ok, as those of you who know, er, know.

Not a problem. It just works, well for this particular stepper motor anyway.

Phew! That saved a complete re-think.

Dave
by davidb24v
Sat Nov 10, 2012 9:31 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Controlling stepper motors via I2C?
Replies: 10
Views: 9053

Controlling stepper motors via I2C?

I'm out of pins on an Arduino for something I'm trying to do with a Pi controlling an Arduino. I have I2C available and in the right place, is there any chance that chucking in another MCP23017 will let me control a stepper motor? It's just a cheap one - the 28BJY-48 with the ULN2003 board. If nobod...
by davidb24v
Sun Nov 04, 2012 1:45 pm
Forum: Automation, sensing and robotics
Topic: RPi + Arduino + Python = Robot!
Replies: 6
Views: 4537

Re: RPi + Arduino + Python = Robot!

Awesome project Wisar! I'm also trying to do something similar - namely to have a bot that will autonomously map out it's surroundings and roam to wherever it can. Have got mine more or less built (there's a post around somewhere - here ). There's a link to the academic paper I stumbled across which...
by davidb24v
Thu Nov 01, 2012 9:58 pm
Forum: Automation, sensing and robotics
Topic: Obstacle avoiding autonomous robot
Replies: 8
Views: 7475

Obstacle avoiding autonomous robot

Hi all, Here's my second "project". I went to that Google thingy for inspiration one morning. Somehow, I stumbled across this paper and got very interested. After messing about with a BigTrak for a bit I decided that wasn't for me - too hard for the ham-fisted to mount sensors etc. so I bought a 4WD...
by davidb24v
Sat Oct 27, 2012 9:09 pm
Forum: Python
Topic: When to declare variables as global
Replies: 27
Views: 6894

Re: When to declare variables as global

Mike, Can I try to cut to the chase here, as a fellow Python n00b. I needed some kind of "global variable" yesterday for a project I'm porting to Python. I have a command line script that may, or may not, launch a GUI. It can also take sub-commands and tell you about the state of the system and take...
by davidb24v
Mon Oct 22, 2012 9:26 pm
Forum: Automation, sensing and robotics
Topic: My Big Trak project
Replies: 2
Views: 4370

My Big Trak project

Here's a bit of rambling on what I got up to with a Big Trak... My aim was to build up from simply "not breaking it" to having an autonomous robot that could map it's surroundings using sensors - and preferably not run over the Mrs or the cat in the process :D I'd never done any electronics (or been...
by davidb24v
Wed Oct 17, 2012 9:34 pm
Forum: HATs and other add-ons
Topic: Gertboard Assembly Thread
Replies: 162
Views: 23076

Re: Gertboard Assembly Thread

I made the mistake of putting the LEDs the wrong way round because I was in a bit of rush and didn't follow the instructions. I assumed the white line on the PCB was the cathode (flat edge) but it isn't. I'm not sure what that line is supposed to mean. Good, it wasn't just me then! :D I even had th...

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