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Wednesday 19th December 2007
Written by Hanno   
Friday, 28 December 2007

The final meeting of the year attracted over 30 people, another record
turn out with lots of new faces and an age range from 6 to, well I was
too polite to ask. We are still fortunate to be able to use the Science
Alive facilities and I was pleased to be able to give them a record gold
coin collection of $38.90. Thanks for your donations, they are
appreciated. I have booked the Science Alive Seminar Room for the third
Wednesday of every even numbered month for 2008, but do check out our
new site http://kiwibots.org just in case of any late changes. I had a
wonderful time, very educational, thought provoking and many of us found
it hard to leave. Thanks to everyone for coming.

Attending Robots and Topics

Peter Harris brought along his prototype robotic lawn mower again. Much
changed since its last appearance, it has lost a lot of weight, acquired
some very business like grass stains and under radio control gave us a
good idea of its agility and speed. Thankfully its cutting blade made of
a hacksaw blade was removed during the demonstration so no damage was
done by those fortunate enough to be trusted to give it a try.

Eric Cummins bought along a mysterious shoe box and gave us a very
entertaining talk about his experiences developing robotic walking legs,
foraging in car yards for parts and applications for the disabled. The
highlight was when Eric opened the shoe box and took out a pair of
precision made robotic legs with torso that walked along the table, and
with a slight of hand could be made to walk around corners. Eric has a
DVD of his robotic adventures which hopefully we will be able to play at
the next session.

Hanno Sander spoke about the Parallax Propellor processor used in his
Dance robot. The processor is a tiny 44 pin device which has 32k words
of RAM and eight parallel 32bit CPUs clocked at up to 80MHz delivering
staggering performance and some very unusual programming
characteristics. Hanno demonstrated how to program the device and
execute code written in assembler or the built in Spin interpreted
language. He also showed us his ViewPort programming environment. The
ViewPort environment turns a PC running Windows connected to the
propellor on a demo board into a 32 channel logic state analyser, with
support for video and fuzzy logic. It is all nicely explained in this
video: http://mydancebot.com/viewport/videos.php Hanno obtained four
Proto boards from Parallax that were offered free to anyone prepared to
bring them along to the next session with a working application. A
number of names went into the hat and the lucky winners were: Carl
Ranson, Andrew McDoughall, Rob Haughy and Richard Jones (honest it was
all above board).


Here's a copy of the powerpoint.

All told a very lively and interesting session. If I’ve missed anything
or corrections are required just email the group. Thanks to all who
came, and for the Christmas fayre eats that we enjoyed.


Next Meeting
Our next meeting will be on Wednesday 20th February 7.30pm Seminar Room.
Hopefully this will be a lively meeting with lots of moving robots, four
working propellor demos and maybe a DVD of robotic legs. See you there!

Last Updated ( Wednesday, 05 March 2008 )
 
Wednesday 15th August 2007
Written by RichardJones   
Thursday, 16 August 2007
Thank you for those who came last night. A good turnout, some new faces and some interesting topics to talk about and things to see. Thanks too for those whose sent appologies, we can't all make every session. We are still fortunate to be able to use the Science Alive! facilities, so please keep your gold coin donations coming in, they are appreciated.

 

This is the first meeting that I (Richard Jones) have unlocked the room for, with Andrew having moved to Japan for a while. All went according to plan.

 

Organisational Developments since the last Meeting

We advertised the meeting to the New Zealand Electronicis Institute, the Bright Sparks organisation and Tait Electronics. Hopefully this approach will allow us to gently grow our numbers. Stimulating new thoughts and ideas. I would like to extend our advertising and will inform Christchurch Soar as our next meeting should be of interest to their members.

 

Also we have a prototype web site: http://groups.msn.com/chchrobotics

The web site has our programme, Science Alive directions, Table Top Challenge and Micromouse information. Either subscribe or send me your content if you would like to have information posted.

 

Attending Robots and Topics

Peter Harris brought along his Roomba robotic vacuum cleaner. It was great. We saw it perform on table tops without falling off. We saw it navigate around many obstacles without getting stuck. We saw it concentrate on areas of floor that we told it needed full attention. It spiralled out, and spiralled back. We saw it pick up our biscuit crumbs. We saw it needing to be emptied. And watched it search for home and go back there for recharging. And yes we took it to pieces and re-assembled it, and it was fully functional again. (After a technical tap!)

 

Carl Ranson showed us his chunky robot propelled with car window winder motors, furniture casters for support, 10A H bridges and SLA for drive with his laptop for brains and 3 sharp IR distance measuring devices. The laptop had a nice mimic of the sensor view and it chugged around the room bumping into thin chair legs but avoiding upturned chairs nicely. Carl also showed some more developments on Hough transforms using his laptop, and is closer to reading bar codes with them and maybe poised for robotic vision.

 

Peter Morris showed his table top challenge robot named 'Hugo' still reliably staying on the table, finding the fluorescent cube and pushing it off. This is a very fine piece of work and is a delight to see in action. Peter also showed us his Nixie Tube clock, constructed on glass fibre PCBs. We were all very respectful of the 180V running round the PCBs.

 

And I showed the Micromouse Maze simulator running in Python on PC and MAC. It can now edit mazes, solve the best route problem in any maze with either 90 or 45 degree turns. Next I will train it to explore the maze in competition style, and publish the code.

 

Statistics

10 In Attendance including 2 partners and 1 chauffeur

5 first timers, 5 been before.

3 from Tait Electronics

1 from Canterbury University

1 from Bright Sparks/Burnside High

10~ Biscuits eaten

3 Robots Moving

$11 Collection

 

Next Meeting Wed 17th October 7.30pm Seminar Room

 

GPS Boomerang presentation by Synco Reynders

Robotics Software Programming – Anyone

Show new and old members how you program your 'bot.

 

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Last Updated ( Wednesday, 14 November 2007 )
 
Wednesday 17th October 2007
Written by Administrator   
Saturday, 27 October 2007

 

Thank you to those who came on Wednesday. A record turnout, some new faces and some new robots and very interesting topics to talk about and things to see. Thanks too for those who sent apologies, we can't all make every session. We are still fortunate to be able to use the Science Alive facilities, so please keep putting your gold coin donations into the tin, they are appreciated.

Organisational Developments since the last Meeting

Advertising and word of mouth is growing our numbers. Please send me any ideas that you may have for publicity, or just do it! I’ll bring some publicity sheets to the next meeting for new members to take away so that they have contact details for us.

Our prototype web site: http://groups.msn.com/chchrobotics has some photos of Wednesday’s session. Subscribe or send me your content if you would like to have information posted. We have had an offer of help with an improved web site and hosting in return for some publicity. More news soon.

Attending Robots and Topics

Image

Synco Reynders gave us a fascinating talk about the development and operation of his GPS Boomerang with videos of media coverage and some experimental flights. See http://www.gpsboomerang.com/ for more details and prices.

Hanno Sander brought a wonderful balancing robot that uses accelerometers and gyros and a parallax propeller array processor to balance on two wheels and dance. The bot leans back before driving forwards, and has a neat trick if the motors cannot meet the demand. Have a look at Hanno’s site http://mydancebot.com. There are some pics from Hanno here: http://groups.msn.com/chchrobotics/shoebox.msnw.

Peter Harris brought along his Robot Lawnmower. Still under development but moving nicely under radio control. Heaps of sealed lead acid batteries, huge FET H bridges and a neat tendancy to stand on its stabilizer wheel. This looks like a bot not to be messed with.

Carl Ranson brought along some tiny DC motors to give away, thanks Carl.

Peter Morris showed his table top challenge robot named 'Hugo' adapted for line following which it did very nicely. Anyone up for line following races next session?

Steve Graham bought an optical stepper motor driven scanning table with a laser line for capturing 3D images on computer that can then be used for direct fabrication.

Richard Jones brought a micromouse maze simulation written in Python now moving and turning in the maze competition style, and a DSL modem to be adapted for robotics using openwrt. See http://openwrt.org/

All told a very lively and interesting session. If I’ve missed anything or corrections are required just email the group. Thanks to all who came.

Next Meeting

Our next meeting will be on Wednesday 19th December 7.30pm Seminar Room (Note the change back to our normal venue). Bring a xmas fare plate and some robots to talk about. With no main topic we can divide our attention appropriately to each bot that comes along.

Statistics

16 In Attendance including 1 partner, 1 chauffeur, 1 guest

6 first timers, 10 been before.

5 from Tait Electronics

1 from Canterbury University

2 from Bright Sparks

~0 Biscuits eaten. I forgot the biscuits doh!

5 Moving Robots. Lawn Mower, GPS Boomerang, Dancebot, Line Follower, Scanner (in approx weight order)

$21.80 Room Collection for Science Alive!

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Last Updated ( Friday, 28 December 2007 )
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