Help with project

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hey guys. i'm thinking making autonomous gas leak detecting robot. i'm planning go destination 1 destination 2 go origin. these parts i'm considering:

wild thumper 6wd
arduino uno(or one?)
adafruit ultimate gps
motor shield (tbd)
7.2v battery 5000mah
ultrasonic sensor
gas sensor

are there other parts need project successful , motor shield recommend. thank you.

i have thought needed brushless motor otherwise sparks bush motor might ignite gas looking for.


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