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Caleb Kraft
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diy
Caleb Kraft   10/10/2013 1:01:31 PM
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I'd say to just start off with a couple DC motors and a motor shield to controll them You can do most of what the other platforms offer on your own with minimal effort. You can print a fancy round frame for it if you really want one.

Max The Magnificent
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Re: diy
Max The Magnificent   10/10/2013 2:45:02 PM
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@Caleb: I'd say to just start off with a couple DC motors and a motor shield to controll them...

I have to say that, having looked around, I tend to agree -- I'm looking around at motors and suchlike as we speak -- but I'm still open to suggestions :-)

Rcurl
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Re: diy
Rcurl   10/10/2013 4:55:18 PM
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If you're willing to build it from the ground up, look here:

http://www.servocity.com/ They've got an excellent collection of motors, brackets, gears, etc.

For kits and mechanical parts I've had good luck with these folks:

http://www.lynxmotion.com/

http://www.pololu.com/

...and of course there are the old standbys:

https://www.sparkfun.com/categories/31

http://www.jameco.com/Jameco/robot/robotstore.html

http://parallax.com/catalog/robotics

elizabethsimon
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Re: diy
elizabethsimon   10/10/2013 5:06:48 PM
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Digilent has some interesting parts...

http://www.digilentinc.com/Products/Catalog.cfm?NavPath=2,403&Cat=11

I like the flat plate with holes to mount things to...

 

Max The Magnificent
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Re: diy
Max The Magnificent   10/10/2013 5:10:46 PM
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@elizabethsimon: ...I like the flat plate with holes to mount things to...

Who wouldn't? LOL

I'm thinking of using something similar -- thank sfor sharing th eDigilnet link -- I hadn't thought of them

Max The Magnificent
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Re: diy
Max The Magnificent   10/10/2013 5:17:01 PM
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@rcurl: If you're willing to build it from the ground up...

That's pretty much what I've decided to do -- these are GREAT links -- thanks for sharing -- Max

willb6
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The Turtle looks good
willb6   10/12/2013 1:10:40 AM
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I like the look of the two-wheeled Turtle from DFRobot, along with their 2A dual motor controller.

The MAKE Rovera, which got one negative review, is actually a bigger, more expensive kit that appears to include the Turtle along with some other stuff, so I wouldn't let that one negative review cloud the DFRobot offering.

Garcia-Lasheras
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Re: diy
Garcia-Lasheras   10/12/2013 9:49:55 AM
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@Max: If you are ready to build your own robot from the ground up, let me offer my own approach.

I'm a LEGO fan since I was little child, and when I need to prototype something similar to a robot, I use to attach some bricks to the MCU boards until I get a nice Frankenstein-like thingy.

The last time I used LEGO plus electronics, I was trying to build a helicopter form factor drone: I bought a simple and big RC helicopter, a wifi enabled webcam and some LEGO Technics boxes to update my collection -- of course, the helicopter was destroyed in the first test flight ;-)

NOTE: In addition to LEGO Technics, now there are available kits for robotics such Mindstorm and NXT.

Max The Magnificent
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Re: The Turtle looks good
Max The Magnificent   10/14/2013 10:15:26 AM
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@willb6: I like the look of the two-wheeled Turtle from DFRobot, along with their 2A dual motor controller.

Thanks for the feedback, but I've sort of gone a different way -- I found an interesting base with three wheels (those strange wheels that have sub wheels on the main wheels) -- then I found a motor controller from AdaFruit that control four motors -- I'll be writing all of this up in a future blog.

willb6
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Re: The Turtle looks good
willb6   10/14/2013 4:41:02 PM
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I am eagerly looking forward to that post! -- Will

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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