Hi all Welcome to the new year. Hope everyone enjoyed their holiday festivities. Onto the robot events. Check out the website for this years dates. ...
Aaron Dwyer
aarond@...
Jan 8, 2001 3:25 am
136
Hi Aaron and Folks, Thanks Aaron for the info. If there is anything I can do to help, let me know. When's the next Committee meeting? For your reference. I...
Paul Nielsen
pnielsen@...
Jan 9, 2001 3:33 am
137
One commercial one I have seen is $65 for 12v 1A. See the robotoz.com.au website if interested. I would think building one is more economical. David...
David Chambers
davidc@...
Jan 9, 2001 5:44 am
138
Hi all, Aaron, I'm afraid I am still unlikely to have my machine ready for the 10th February. I might have some functionality working though, so it may be good...
Linus Dillon
ldillon@...
Jan 9, 2001 8:28 am
139
Paul, I'm not sure as to your power requirements but you can get the L293D from Dick Smith for around $10 to handle 600mA per channel . It's not in the catalog...
dcox@...
Jan 9, 2001 10:11 pm
140
Hi Linus, Could you elaborate a bit more on your H-bridge. Regards, Paul N....
Paul Nielsen
pnielsen@...
Jan 10, 2001 12:40 am
141
Hi David, Thanks for the thought. I've been using the 293D on the Handy Board. It doesn't seem to be able to delver enough power. I've tried stacking two...
Paul Nielsen
pnielsen@...
Jan 10, 2001 12:49 am
142
Hi Paul, I've found that the drivers on the Handyboard ( mine are the L293 substitutes TI75144 or something) do somehow have a lower output voltage than input....
Mark Benjamin
mbenjami@...
Jan 10, 2001 1:08 am
143
Yep. The L293 (and substitutes) will lose about 1.5V at low currents (<100 mA) and about 3.5V at high currents (~1.5A) when configured as an H-bridge. This is...
Gordon Wyeth
wyeth@...
Jan 10, 2001 1:32 am
144
OK, here is the circuit I am using for motor control on my stock car. This is NOT in fact a H-bridge, but rather an alternative that avoids some of the ...
Linus Dillon
ldillon@...
Jan 10, 2001 12:26 pm
145
Hi all Sorry for the late reminder. We will be having a organisational / test robot meeting tomorrow night in preparation for the competition. The competition...
Aaron Dwyer
aarond@...
Feb 5, 2001 8:33 am
146
Hi all The next meeting will be a full blown test of the robots before the competition. We have a room booked at QUT (S920), that's level 9 room 920 of S block...
Aaron Dwyer
aarond@...
Mar 3, 2001 6:19 am
147
Hi all My apologies in advance as neither myself or Anthony (and our robots) will be able to make it for this Tuesdays meeting due to work commitments. However...
Aaron Dwyer
aarond@...
Mar 5, 2001 11:01 am
148
Hi all. The competition is upon us once again. This weekend on Saturday 17th March 2001 at the Sciencentre in Brisbane. See the attached flyer for details. For...
Aaron Dwyer
aarond@...
Mar 12, 2001 8:17 am
149
I'm waging a local war on wasting mail-space with large attachments - and you'v attached your 100K PDF file twice! The civilised way is to paste the text into...
John Billingsley
johnbill@...
Mar 12, 2001 11:33 pm
150
My apologies to all for the double attachment. That was a slip up on my part. Regards Aaron. -- Aaron Dwyer PH: 3804...
Aaron Dwyer
aarond@...
Mar 13, 2001 1:39 am
151
Hi all We will be at QUT again this meeting. Usual time. 7:30pm. Room S920 at QUT Gardens point campus. We will be watching the video footage of the...
Aaron Dwyer
aarond@...
Apr 2, 2001 9:53 am
152
Hi all Next meeting is on the 1st May (Tuesday). As per the now usual room of S920 at QUT Gardens Point. 7:30pm. This will be the Annual General Meeting. ...
Aaron Dwyer
aarond@...
Apr 30, 2001 5:33 am
153
Hi all The GU open day this year is on Sunday June 24. We have been invited along again, and I think this is another good opportunity to get together with our...
Aaron Dwyer
aarond@...
May 16, 2001 7:15 am
154
Hello, I'm new here! Can you help with this project? I have to work with potential fields,and I would apreciate any kind of help (algorithms in matlab? local...
Ricardo Jorge
ricardo_woofer@...
May 18, 2001 3:54 pm
155
Hi Richardo, Can you tell me what a potential field actually is? I assume you are are attempting to use something like a neural network, I have a copy of a...
john.carter@...
May 21, 2001 7:40 am
156
Thanks John Carter! To tell you the truth I have't seen yet neural networks, so I can not know if it's usefull for me. I'll see genetic algorithms,as you have ...
Ricardo Jorge
ricardo_woofer@...
May 21, 2001 11:56 am
157
I second this, what is potential fields? has it got any thing to do with Hall effect sensors and motor sensing (potential fields??) At 05:40 PM 5/21/01 +1000,...
Nicolas J. Munro
nedarg@...
May 21, 2001 12:16 pm
158
'Potential fields' is yet another simile to label a somewhat different activity. Invent a 'repulsion function' for anything you want to avoid and an 'attaction...
John Billingsley
johnbill@...
May 22, 2001 1:21 am
159
The first reference I'm aware of is Khatib, O [1985] Real time obstacle avoidance for manipulators and mobile robots. Proc. IEEE Int. Conf. Robotics and...
Gordon Wyeth
wyeth@...
May 22, 2001 1:33 am
160
Hi, I have done something similar as part of a game development. It wasn't a full potential field as such, because it did not generate a complete matrix for...
Linus Dillon
linus_dillon@...
May 23, 2001 8:48 am
161
Thanks Linus Dillon At this moment I'm starting to work with Matlab, and it's going!(more or less) This is for a University project I have to make .I'm at...
Ricardo Jorge
ricardo_woofer@...
May 23, 2001 2:08 pm
162
Hi all As a late note (my apologies) there will be _NO_ monthly meeting for the Robot SIG this month. (usually at QUT). There is instead a meeting at the GU...
Aaron Dwyer
aarond@...
Jun 4, 2001 5:05 am
163
Hi all This is an early reminder about the Griffith Uni Open Day this weekend. Date: 24th June, Sunday. Time: 10am-3pm. We will be holding a display (demo)...
Aaron Dwyer
aarond@...
Jun 19, 2001 11:13 am
164
Hi Arron, Blake and I expect to be there John ... From: Aaron Dwyer [mailto:aarond@...] Sent: Tuesday, 19 June 2001 21:16 To: Brisbane Robotics SIG ...
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