http://forums.leaflabs.com/topic.php?id=698 A place to share, learn, and grow... en-US Sat, 18 May 2013 05:01:16 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=698&page=2#post-7198 Sat, 19 Nov 2011 20:15:50 +0000 crenn 7198@http://forums.leaflabs.com/ <p>It might have been an effective method to control the motor speed, however, the problem is the equipment needed to measure all of these factors was not completed as the stand/mounting block was not completed. </p> http://forums.leaflabs.com/topic.php?id=698&page=2#post-7184 Thu, 17 Nov 2011 14:48:30 +0000 gbulmer 7184@http://forums.leaflabs.com/ <p>crenn - okay, I think I get it. I thought you might be using them to derive motor feedback by 'continuously' measuring motor current. </p> http://forums.leaflabs.com/topic.php?id=698&page=2#post-7178 Wed, 16 Nov 2011 05:27:18 +0000 crenn 7178@http://forums.leaflabs.com/ <p>Well, the voltage and current sensors themselves worked fine and helped provide feedback on the battery voltage. The current part also worked but was not implemented in the final code. An ADC read takes 7uS, but I only updated those sensors every 20ms or so as I did not need a high update rate. </p> http://forums.leaflabs.com/topic.php?id=698&page=2#post-7174 Tue, 15 Nov 2011 21:48:18 +0000 gbulmer 7174@http://forums.leaflabs.com/ <p>crenn - Commiseration's, I am a bit sad to learn that things didn't go smoothly. I'll be interested to learning from your hard won wisdom.</p> <p>I did wonder how well the "Voltage and Current Sensors" worked. I wondered if they'd be fast enough to do "optimal" speed control of motors. </p> http://forums.leaflabs.com/topic.php?id=698&page=2#post-7172 Tue, 15 Nov 2011 20:51:29 +0000 crenn 7172@http://forums.leaflabs.com/ <p>So this project ended last week after a presentation was done on it saying what was achieved and what wasn't achieved. Summary of end result: aircraft didn't fly and was not stable enough to fly.<br /> After my exam tomorrow, I'll be doing a large write up on my site introducing the project (as I never introduced the project on my site) and go through the project and the problems encountered in as much depth as I can. There is a lot wrong that shouldn't be, but I won't go into that in this post. I'll update this thread later when post on my website.<br /> Either way, after I finish my write up, that will be marking the end of anything to do with that project. I have a lot of other projects to work on which should keep me busy during my break (although I'm currently looking for an intern position which means I'll be busy during week days, if I get a position) and which should yield better results than this project. </p> http://forums.leaflabs.com/topic.php?id=698&page=2#post-6161 Wed, 31 Aug 2011 16:50:55 +0000 crenn 6161@http://forums.leaflabs.com/ <p>Well, things are quietening now for the moment, which should give me enough time to spend time finishing off the Wire library for general use. We've been using it actively in our project and I believe it's stable enough for a release. My apologises that it's been delayed.</p> <p>I've recently integrated 3 of these Voltage and Current Sensors (I call them VIS, <a href="http://www.sparkfun.com/products/10643" rel="nofollow">http://www.sparkfun.com/products/10643</a> ) into the project so that we can see the voltage level of the battery and also the current draw of each of the motors. I'm also going to be trying to, over the weekend, to implement dual ADC sampling that has been developed in the forums.</p> <p>But you can say for the Maple Mini, As seen on TV!<br /> <a href="http://www.youtube.com/watch?v=xt-jVRvdG58" rel="nofollow">http://www.youtube.com/watch?v=xt-jVRvdG58</a><br /> <a href="http://www.youtube.com/watch?v=ruEvBooHrMo" rel="nofollow">http://www.youtube.com/watch?v=ruEvBooHrMo</a></p> <p>As for sunday, things didn't go very well. The board I designed, stopped working after I touched up some solder joints, and while diagnosing the issue, I accidentally caused a short circuit through the frame which melted the wires going to the board. Luckily the board was actually fine and the problem was traced down to a faulty solder joint on a via, on the ground line. I got a new board made which will prevent the problem occurring ever again and was also a bit smaller. </p> http://forums.leaflabs.com/topic.php?id=698#post-6013 Fri, 19 Aug 2011 13:09:10 +0000 mbolivar 6013@http://forums.leaflabs.com/ <p>awesome! good luck for sunday! </p> http://forums.leaflabs.com/topic.php?id=698#post-6012 Fri, 19 Aug 2011 10:21:52 +0000 crenn 6012@http://forums.leaflabs.com/ <p>This is several days work (6 days designing the board, 5 hours getting it made and then assembled):</p> <p><a href="http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/DSC_0005.jpg" rel="nofollow">http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/DSC_0005.jpg</a><br /> <a href="http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/DSC_0003.jpg" rel="nofollow">http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/DSC_0003.jpg</a><br /> <a href="http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/DSC_0001.jpg" rel="nofollow">http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/DSC_0001.jpg</a><br /> <a href="http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/2011-08-19_22-06-17_222.jpg" rel="nofollow">http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/2011-08-19_22-06-17_222.jpg</a><br /> <a href="http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/2011-08-19_22-06-07_802.jpg" rel="nofollow">http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/2011-08-19_22-06-07_802.jpg</a><br /> <a href="http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/2011-08-19_22-05-38_725.jpg" rel="nofollow">http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/2011-08-19_22-05-38_725.jpg</a><br /> <a href="http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/2011-08-19_22-05-15_307.jpg" rel="nofollow">http://i3.photobucket.com/albums/y81/crenn/TBVTOL_Project/PCBv01/2011-08-19_22-05-15_307.jpg</a></p> <p>Time for sleep, the uni has an open day this Sunday and we're working overtime to get it to hover. </p> http://forums.leaflabs.com/topic.php?id=698#post-4275 Mon, 11 Apr 2011 15:45:09 +0000 crenn 4275@http://forums.leaflabs.com/ <p>The brushless motors are controlled by modified brushless speed controllers running on I2C with a firmware my partner found on an RC Hobby website. I have the code used, just German isn't my strongest language and I'd have to work out how it's working before I could port that code to the Maple if that's what you're asking, however, I do understand the concept of how it works.</p> <p>As for how to control the speed controllers themselves, after addressing an individual speed controller, you write a single byte to it (0-255). </p> http://forums.leaflabs.com/topic.php?id=698#post-4272 Mon, 11 Apr 2011 14:28:08 +0000 poslathian 4272@http://forums.leaflabs.com/ <p>crenn, forgive me if I missed this somewhere. Do you have your brushless implementation posted somewhere? We would love to add this to the libraries! </p> http://forums.leaflabs.com/topic.php?id=698#post-4257 Sat, 09 Apr 2011 11:20:02 +0000 crenn 4257@http://forums.leaflabs.com/ <p>Just a minor update (1:17AM whoo! Been programming most of the day), there has been progress happening slowly on the robot, and details will be posted soon. Also, there might be the possibility of a video of the robot flying this week, although part of it will be controlled with a remote control. More details to follow. </p> http://forums.leaflabs.com/topic.php?id=698#post-4249 Fri, 08 Apr 2011 19:37:52 +0000 ridgebackred 4249@http://forums.leaflabs.com/ <p>poslathian,<br /> Needless to say, I am fan of what LeafLabs is accomplishing. It took the AVR line seven or eight years to get to it's current state of bliss with a large informal contributor group and factory support. LeafLabs is compressing this into two or three years with a small development team on tougher to tame silicon. To me, that is jaw dropping awesome! </p> http://forums.leaflabs.com/topic.php?id=698#post-4247 Fri, 08 Apr 2011 18:17:54 +0000 poslathian 4247@http://forums.leaflabs.com/ <p>ridgebackred - the long tail of uses people are getting out of cheap cellphone tech is going to be quite long and awesome! Dont neglect the console companies too, I might remind everyone the stm32 chip in the Maple has a home in the sony playstation 3 controller. Speaking of which, anyone who manages do to any sort of hack exploiting the fact that both Maple (libmaple, wirish, our ide, or the hardware) and the playstation 3 controller are based on the same chip (stm32f103rbt6) will get something awesome from us. I dont know what yet, but it will be great ;) (perhaps a cake, stuffed with hardware, surrounded by accelerometers - or perhaps a featured blog post) </p> http://forums.leaflabs.com/topic.php?id=698#post-4246 Fri, 08 Apr 2011 18:12:02 +0000 poslathian 4246@http://forums.leaflabs.com/ <p>Roberto, weve been tracking your project. Great stuff! Check them out at <a href="http://www.virtualrobotix.com/" rel="nofollow">http://www.virtualrobotix.com/</a> </p> http://forums.leaflabs.com/topic.php?id=698#post-4208 Thu, 07 Apr 2011 12:23:40 +0000 jessb 4208@http://forums.leaflabs.com/ <p>This is belated, but crenn, you should most definitely do a wiki post about this project. We'd love to follow its progress. </p>