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46  Community / Bar Sport / Re: 10 Year OLD resistors pack! on: December 29, 2013, 01:44:52 pm
No wait, sticks and Fire!
47  Community / Bar Sport / Re: 10 Year OLD resistors pack! on: December 29, 2013, 01:44:21 pm
When I was a kid...  There was no DTL...  no RTL...  We used lamps and switches!
48  Using Arduino / Motors, Mechanics, and Power / Re: 28BYJ-48 5-Volt Stepper on: December 29, 2013, 11:38:48 am
Darn, can't find them by Googling.  After 100 rotations of 4096 it should be off by about 180 degrees.  Is this what you're seeing?
49  Using Arduino / Motors, Mechanics, and Power / Re: 28BYJ-48 5-Volt Stepper on: December 28, 2013, 01:54:13 pm
Has anyone tested the same physical motor size with 16:1 ratio?
50  Using Arduino / Motors, Mechanics, and Power / Re: 28BYJ-48 5-Volt Stepper on: December 20, 2013, 02:42:57 pm
I don't have the code or the motors handy right now.  I'm away from my Lab.  I did the test almost 2 years ago.  Attach a pointer or stick to the motor.  Simply rotate 4096, then stop for 1 second.  Repeat.  After a few seconds, minutes, certainly hours the pointer will stop at a different place moving around like a clock.  20/4096 is 0.5% which is a lot!  More than 1 degree error for each revolution.  That's how I know mine are/were exactly 4096. 
51  Community / Exhibition / Gallery / Re: Lunar Module on: December 20, 2013, 02:35:16 pm
It's a Space Race to see who will be first!
http://www.popularmechanics.com/science/space/moon-mars/the-lunar-x-prize-heats-up-16278801
52  Using Arduino / Motors, Mechanics, and Power / Re: 28BYJ-48 5-Volt Stepper on: December 19, 2013, 07:40:45 am
They are ALL 4076?  Sounds like I'm the only one with 4096 motors?  It's a simple code to test them just keep spinning in the same direction stopping every 4096 for an hour.
53  Using Arduino / Motors, Mechanics, and Power / Re: 28BYJ-48 5-Volt Stepper on: December 18, 2013, 02:57:37 pm
I understand it's for Beginners but...  In your Wiki you didn't mention that it's possible some motor are NOT exactly 2048 steps per revolution.  This could be confusing for some beginners.  Maybe yours are 2048?  I have not seen any information online about how to identify these motors.  Which category are most popular.  Or where to buy them?
54  Using Arduino / Motors, Mechanics, and Power / Re: 28BYJ-48 5-Volt Stepper on: December 18, 2013, 02:41:37 pm
Thanks for including my code and input on these topics:

1) duty cycle within each step while turning
2) different ways to avoid overheating
3) turning off coils when idle with geared motors
4) non-blocking code can execute other tasks at same time
5) measuring torque simply, to avoid faults or detect end of travel
6) ramping to increase speed and stop skipping steps with a large object

Great Wiki and kit Terry!  Still nobody has documented which motors have exactly 2048 steps/revolution, and which have an odd number with a fraction to the right of the decimal point.  Anyone?
55  Using Arduino / Motors, Mechanics, and Power / Re: New 28BYJ-48 library on: December 18, 2013, 02:29:18 pm
It was hard for me to find by searching too, so don't feel bad.  I explained it on March 28 here in this thread page 2.  There is much more info here:
http://forum.arduino.cc/index.php?topic=85335.120
I wish there was a way to combine these.
56  Community / Exhibition / Gallery / Re: Lunar Module on: December 18, 2013, 11:25:09 am
"We are those crazy people who think that every idea is crazy until we make it happen then people say...  Of course!"

"The iPhone of Space"

The first private company to land on the Moon.  Pimple powered lunar lander.  Helium-3 from the moon will give us power on earth for 100's of years. 
http://moonexpress.com/

Jim is a friend from way back, but he never would have thought of me  if someone didn't Google "Autonomous Quadcopter" to find me here on this forum!  Thanks Arduino Forum!
57  Community / Exhibition / Gallery / Re: GPS time-date on: December 17, 2013, 12:57:32 pm
With a PPS pin output from GPS you can get time accurate to about 100ns!
58  Community / Exhibition / Gallery / Lunar Module on: December 17, 2013, 12:55:57 pm
I will be part of a small team designing a Lunar Module thanks to this forum and Google which made it possible!
http://en.wikipedia.org/wiki/Google_Lunar_X_Prize
My Quadcopter code and hardware will be used to test the IMU that is going up in 2015!
PM if you want details...
59  Using Arduino / Motors, Mechanics, and Power / Re: New 28BYJ-48 library on: December 15, 2013, 10:02:20 am
At the beginning of one of these posts I have described each function the best way that I can.  There are details I have not included that can only be discovered thru experimentation.  To make a motor run forever is simple.  Just choose a large number for deg100 that will run a long time.  Then put it in a loop or loop().  Let's take calloften() as an example.  First you setup the distance and speed you want with it's friend function.  Then you call often calloften() in loop().  At least every d ms.  d is a global variable.  Seems easy to me.  It will be easy for you too, after you get it running.  The first time is the most difficult. 
60  Using Arduino / Project Guidance / Re: RC Receiver channel output to Arduino to manipulate signal on: December 15, 2013, 09:40:06 am
A big improvement would be to measure lateral acceleration to determine whether the R/C vehicle is moving in a straight line or turning sharply.  If straight use front brakes to take advantage of 90% weight shifting to front.  If turning use rear only for increased control of vehicles path.  Maybe allow for compromise during gradual turns.  What do you think?
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