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I Was Wanting To Make A Tracked Robot With My Arduino Uno R3. I Was Wondering Which Track I Should Get (Under $25). And Wanted An Opinion On Ultrasonic Sensors. (Under $10).

Thank You
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Build a robot! Pololu 22T Track Set! ($12.95)
http://compare.ebay.com/like/190682513664?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar&_lwgsi=y&cbt=y

Tamiya Tracked Vehicle Chassis Educational Model Kit  (About $23 with shipping)
http://www.google.com/shopping/product/639688927265948080?q=robot%20tracks&hl=en&client=safari&rls=en&psj=1&bav=on.2,or.r_cp.r_qf.&biw=1338&bih=1032&sa=X&ei=jRhFUeL-MLDi4AP6m4HIBQ&ved=0CHIQ8wIwAjg8


HC-SR04 Ultrasonic Distance Sensor Shield Module for Arduino  $2.26
http://www.fasttech.com/products/0/10000007/1012007-hc-sr04-ultrasonic-distance-sensor-shield-module-f
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The first one does not come with motors, which will cost $16/each.

The second one, I believe, has only a single motor, so it cannot turn. However, there is
something similar with a dual-motor gearbox.

http://www.pololu.com/catalog/product/61
http://www.pololu.com/catalog/product/106
http://www.pololu.com/catalog/product/79
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Quote
The first one does not come with motors, which will cost $16/each.

I bet DIY continous rotation servos could be attached to the sprockets using a little hot glue to save some $$$.
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I used the Tamiya Tractor kit which came with three motors and two gearboxes.

Because you are using analog motors I had a harder time researching code as most people modify the tamiya to use continuous rotation servos.

I also purchased a parallax ping sensor. I was able to get everything running in an autonomous movement setup. The ping sensor, or my coding is a bit iffy. I probably need to mount my sensor up higher in relation to the chassis.

I'm running mine with an arduino motorshield, and a Arduino Mega ADK, with the eventual goal of a controllable robot by 3/4G android with a wifi netcam mounted.

Check it out at www.murphyslawwrobotics.blogspot.com
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Quote
Because you are using analog motors I had a harder time researching code as most people modify the tamiya to use continuous rotation servos.
In general, either way works ok. With the Tamiya motors, you need to use a motor shield
such as from adafruit, and the programming info is readily available. With continous rotation
servos, you can just use the Arduino Servo library.

http://www.adafruit.com/products/81?gclid=CLS-uuauhLYCFSRxQgodvjAA9g
http://www.ladyada.net/make/mshield/
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