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Messages 4290 - 4319 of 4319   Newest  |  < Newer  |  Older >  |  Oldest
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4319
damn school i will be stuck in school from 8:10-3:20 anybody have a way around this i would rely like a new multimeter ________________________________ From:...
Lou Kaufman
robot_lou
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3:00 am
4318
... neat. Given all the zero's I was multiplying in my example I figured there was a simpler solution. I would still use a program to calculate out the values...
bill
laserfur2
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Nov 30, 2009
10:15 pm
4317
Assuming that you can curve your fiberglass panels use the following relation ships to sketch out your panel. For angles between 0 and 90 degrees. Width =...
Martin, Jeff
mart0784umnedu
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Nov 30, 2009
8:41 pm
4316
... In the end you will have to either find a table or use a program to create a table since as you know the panels are not straight edged. The vector math...
bill
laserfur2
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Nov 30, 2009
4:27 am
4315
Ooh, you lost me at the vectors. :) I was hoping for something like a blueprint flat-pack with a formula for different size domes. Such as; For a 6 foot dome,...
Craig & Cindy
cindycraig_ec
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Nov 30, 2009
4:17 am
4314
There is a whole industry around this stuff. See http://obs.nineplanets.org/obs/obslist.html for example. I whimped out and just put a modified garden shed...
Kym Horsell
kymhorsell
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Nov 30, 2009
3:13 am
4313
... I'm probably the worst at math since I never had algebra it in school, however... Since the panels are flat between points you can take the distance ...
bill
laserfur2
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Nov 30, 2009
3:05 am
4312
To cut to the chase, I am entertaining the idea of making an observatory telescope tower turret built into my garage. The roof should be classic dome shape...
Craig & Cindy
cindycraig_ec
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Nov 30, 2009
2:31 am
4311
... It gets even worse when you factor in the weight of the power supply or power source. The only thing I've found that can beat humans is in-cylinder...
bill
laserfur2
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Nov 29, 2009
7:44 pm
4310
... FCC and RF. When the transistor is turned on, any noise imposed on the ground near the transistor can be radiated by the wires going to the coil. I've done...
bill
laserfur2
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Nov 29, 2009
7:38 pm
4309
ill be...it measures 1.5 micro henrys, thanks Jeff. why would they put a inductor in series with a 24vdc coil in a darlington transistor (ULN2003A) circuit? ...
andrew w
v3dmeautomation
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Nov 29, 2009
3:29 am
4308
It may be an inductor or ferrite. That would appear to be close to zero ohms....
Jeff Sampson
jws8675309
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Nov 29, 2009
1:34 am
4307
does anyone know what these are? on the silk screen, it is labeled with an E? looks like a SMT cap or resistor. black with no markings on it, there are...
andrew w
v3dmeautomation
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Nov 29, 2009
1:13 am
4306
Hi Craig, Yup, with proper gearing, you should be able to get any torque you want (didn't Archemedes say basically the same thing about moving the Earth with a...
bruce shapiro
taomc57
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Nov 28, 2009
9:07 pm
4305
With gearing, strength is sacrificed for speed. For example with R2’s middle leg deployment some were using linear actuators. The slow ones stayed in place...
Craig & Cindy
cindycraig_ec
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Nov 28, 2009
6:31 pm
4304
Thanks Alan! (man, that was quick)-- I realized, a few seconds after sending my message, that this is really a question of power/wt (not force/wt or...
bruce shapiro
taomc57
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Nov 28, 2009
6:55 am
4303
Muscle power in Watts: http://biomed.gerontologyjournals.org/cgi/content/full/60/4/476 http://www.uic.edu/aa/college/gallery400/notions/human%20energy.htm ...
Alan Kilian
alankilian
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Nov 28, 2009
6:26 am
4302
Hi gang, I'm having trouble answering what I thought would be an easy question: What is the relative ability of human muscle vs. state-of-the-art...
bruce shapiro
taomc57
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Nov 28, 2009
6:17 am
4301
Neet 1. you might want to stop by the hobby store and buy a 1/32 shaft collar. They are in the airplane isle and have a small set screw. 2. I still think that...
bill
laserfur2
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Nov 28, 2009
12:24 am
4300
Thanksgiving evening I brought up my Stirling engine model to show my brother. Peter wanted to know why it didn't work, and all I could say is "I don't know....
Alan Kilian
alankilian
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Nov 28, 2009
12:06 am
4299
oh yeah I plan to have my list together and entered and ready to "CLICK" immediately! one large item might be easier then a bunch of small stuff, but the bunch...
Overkill
mr_overkill1
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Nov 27, 2009
5:09 pm
4298
I read somewhere that they expect to sell out in the first 5 minutes. So don't spend too much time on the exact combination of things to buy. Just make sure...
Jeff Sampson
jws8675309
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Nov 27, 2009
5:04 pm
4297
I had already been made aware of this VIA a facebook post. and with a week or two to prepare...the questions becomes how to spend my free $100 wisely! what...
Overkill
mr_overkill1
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Nov 27, 2009
4:43 pm
4296
OK maybe I'll hit him up for one more. Do you know by chance if they are still in production. -Kenneth ________________________________ From: Pete Bergstrom...
Kenneth Kern
kurck2201
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Nov 25, 2009
2:55 pm
4295
I got this in my personal e-mail, and Theresa said I could forward it on to you folks to see if one of you can help her and her team. Please contact her...
Alan Kilian
alankilian
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Nov 25, 2009
4:05 am
4294
sorry about the reply all...
Pete Bergstrom
pbergstrom2001
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Nov 24, 2009
10:53 pm
4293
... Sorry, I've already arranged to sell Lewis the other few LCDs. Pete...
Pete Bergstrom
pbergstrom2001
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Nov 24, 2009
10:43 pm
4292
Hey all. My name is Paul and I heard about this group from the director of manufacturing at my school. A couple of my Dunwoody classmates and I came to the...
appliancide
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Nov 24, 2009
10:18 pm
4291
I'll be recovering from Thanksgiving....
Alan Kilian
alankilian
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Nov 24, 2009
7:45 pm
4290
http://www.sparkfun.com/commerce/news.php?id=305...
Jeff Sampson
jws8675309
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Nov 24, 2009
5:56 am
Messages 4290 - 4319 of 4319   Newest  |  < Newer  |  Older >  |  Oldest
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