X-cad is giving out a free copy of their 3DCAD software to the first 100,000 people to register. Go here to see the article in Desktop Engineering, with the...
Holy Moly! Time has flown by. Are we having a meeting this saturday? It is the third saturday of the month. Do we have a presentation? If not, should we all...
Yes it is the 3rd Saturday and yes we are having a meeting on Saturday 10am-noon at Roseville STAC. Tak will do a presentation on Stepper motors. Yes, we can...
368
Ralph Shamie
rshamie@...
Jul 19, 2005 7:03 pm
Last Meeting we discussed flyback diodes and Darlington pairs for motor controllers. Several Darlington pair part numbers were mentioned. But not any diodes....
369
Tak Auyeung
tauyeung@...
Jul 20, 2005 6:14 am
The 1N4148 is a good choice for "small" stepper motors (floppy drive type). --Tak...
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Ralph Shamie
rshamie@...
Jul 26, 2005 6:30 pm
Tak, Thank you. Is the 1N4148 better because it is a fast switching diode? I found a number of diodes in my junk box that can carry as much current. Is there...
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Tak Auyeung
tauyeung@...
Jul 26, 2005 6:51 pm
Ralph, Yes, the 1N4148 has a fast switch time. This helps to minimize the exposure (of other components) to the electrical "kick". Darlington pairs can switch...
372
sacrobotics@yahoogrou...
Sep 15, 2005 4:58 pm
Reminder from the Calendar of sacrobotics http://groups.yahoo.com/group/sacrobotics/cal Group Meeting Saturday September 17, 2005 10:00 am - 12:00 pm (This...
373
Tak Auyeung
tauyeung@...
Sep 17, 2005 10:56 pm
Just in case anyone is interested... My website is http://www.drtak.org The presentation is at http://www.drtak.org/plays/sarg20050716.sxi (OpenOffice Impress...
The third Saturday this month is the 22nd. I am going to try my best to make it to the meeting this time. Is it going to be at Parallax again, or back at STAC?...
Hey I am hoping everyone is messed up! I was also thinking the third Saturday was the 22nd. I have a place for us to meet on the 22nd this month. It is then...
Hi folks, My name is Lynda Weiss, and I am a member of this user group, although I haven't been able to make it to meetings since we lost Nerdbooks as a site. ...
378
sacrobotics@yahoogrou...
Nov 12, 2005 5:57 pm
Reminder from the Calendar of sacrobotics http://groups.yahoo.com/group/sacrobotics/cal Sacrobotics Group Meeting Saturday November 19, 2005 10:00 am - 12:00...
Here is a link to a map for the November meeting... http://www.valleysprings.org/location.htm I will be giving first half of a two part presentation on using...
380
sacrobotics@yahoogrou...
Nov 16, 2005 5:58 pm
Reminder from the Calendar of sacrobotics http://groups.yahoo.com/group/sacrobotics/cal Sacrobotics Group Meeting Saturday November 19, 2005 10:00 am - 12:00...
Hello, My name is James Nugen. I was a first time visitor to your meeting on Saturday. In the discussion, I mentioned that there were a few free (and open...
Good picks James, TinyCAD is one of the best simple schematic tools out there. It's very easy to use, yet has alot of extras. The developer, Matt Pine, is...
Here's a little info on the Micro Line Follower I am working on for the group project. I put some datasheets in the group files directory under "MLF" Standard...
Jeff, Thanks for the work you've been doing on the 'bot design - it's looking very cool. I'd like to hear what other people are thinking about the design....
Jeff, Thank you for getting this project started. I think designing the robot with extra avalible options is a good idea. Most people seem to have very...
I vaguely remember someone mentioned magnetic encoders that encode based on the phase of magnetic orientation. This may work, but the electro-magnetic noise...
Would anyone be interested in having a kernel, and background functions preprogrammed in conjunction with a bootloader? It would probably take less than 10% of...
I do have a real-time kernel that uses up 2kB of flash. It includes round-robin, time-slicing, priority queues, semaphores and etc. You can find it at...
Another option that I have started looking at is the OS being used in wireless sensor network research, TinyOS: http://www.tinyos.net/ Several of the hardware...
392
sacrobotics@yahoogrou...
Dec 3, 2005 5:55 pm
Reminder from the Calendar of sacrobotics http://groups.yahoo.com/group/sacrobotics/cal Sacrobotics Group Meeting Saturday December 10, 2005 10:00 am - 12:00...
Wow, my first free moment since my last post! It is wonderful to see discussion on the subject. Peter suggested the other day that we try a PC-104 type bus...
394
sacrobotics@yahoogrou...
Dec 7, 2005 5:55 pm
Reminder from the Calendar of sacrobotics http://groups.yahoo.com/group/sacrobotics/cal Sacrobotics Group Meeting Saturday December 10, 2005 10:00 am - 12:00...
